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Indian Institute of Science
1.
Dighe, Anasuya.
Studies on Dynamic Plasticity of Ligand Binding Sites in Proteins.
Degree: PhD, Faculty of Science, 2019, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/4236
► Molecular recognition between proteins and their associated ligands constitutes ligand-induced protein rewiring thereby enabling the formation of a stable protein-ligand complex. The studies presented in…
(more)
▼ Molecular recognition between proteins and their associated ligands constitutes ligand-induced
protein rewiring thereby enabling the formation of a stable
protein-ligand complex. The studies presented in this thesis address the conformational plasticity inherent to proteins by virtue of which they adapt to diverse ligands and orchestrate complex biological processes like signal transduction, transcription and
protein-protein interaction. Adopting network theory based formalisms for understanding
protein-ligand associations involve deconstructing the three-dimensional
structure of a
protein in terms of nodes and edges. With this view,
Protein Structure Networks (
PSNs) of ligand-bound complexes are studied by considering their side-chain non-covalent interactions. Agonist and antagonist-bound G-
Protein Coupled Receptors (GPCRs) are investigated to gain mechanistic insights into allostery and its role in signal transduction. The degree of similarity between
PSNs of these complexes is quantified by means of Network Similarity Score (NSS). The physical nature of these
networks is inspected by subjecting them to perturbations and major players in maintaining the stability of such
networks are identified. Residue-wise groupings (at backbone and side-chain level) are obtained by applying graph spectral methods.
All-atom Molecular Dynamics (MD) simulations are carried out to gain a better understanding of
protein-ligand binding by analysing conformational ensembles of these complexes. In this scenario, two members from a highly versatile ligand-inducible transcription factor superfamily, i.e., Nuclear Receptors (NR) are studied, that are known to exhibit extremes of ligand binding behavior ranging from promiscuity to specificity.
Diverse ligands are known to bind to proteins and the overall nature of their binding site is investigated. In particular, similarities among binding sites of diverse proteins are analysed by using PocketMatch. Percolation of these similarities to regions surrounding the binding site is reported and examples depicting this extended similarity are discussed.
Overall, studies presented in this thesis provide a structural perspective into the adaptability of proteins for recognizing diverse ligands and undergoing local or global re-organizations in their framework to regulate complex biological processes.
Advisors/Committee Members: Vishveshwara, Saraswathi (advisor), Chandra, Nagasuma (advisor).
Subjects/Keywords: Protein-ligand Interactions; Protein Ligand Interactions; Protein Structure Networks (PSNs); Graph Theory; Protein Side-chain Networks (PScN); Muscarinic Acetylcholine Receptors; Muscarinic Receptor Cmplexes; Protein-Protein Interactions; Pregnane X Receptor; G-Protein Coupled Receptors (GPCRs); Network Similarity Score (NSS); Biochemistry
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APA (6th Edition):
Dighe, A. (2019). Studies on Dynamic Plasticity of Ligand Binding Sites in Proteins. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/4236
Chicago Manual of Style (16th Edition):
Dighe, Anasuya. “Studies on Dynamic Plasticity of Ligand Binding Sites in Proteins.” 2019. Doctoral Dissertation, Indian Institute of Science. Accessed January 23, 2021.
http://etd.iisc.ac.in/handle/2005/4236.
MLA Handbook (7th Edition):
Dighe, Anasuya. “Studies on Dynamic Plasticity of Ligand Binding Sites in Proteins.” 2019. Web. 23 Jan 2021.
Vancouver:
Dighe A. Studies on Dynamic Plasticity of Ligand Binding Sites in Proteins. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2019. [cited 2021 Jan 23].
Available from: http://etd.iisc.ac.in/handle/2005/4236.
Council of Science Editors:
Dighe A. Studies on Dynamic Plasticity of Ligand Binding Sites in Proteins. [Doctoral Dissertation]. Indian Institute of Science; 2019. Available from: http://etd.iisc.ac.in/handle/2005/4236

University of Tennessee – Knoxville
2.
foutch, david.
Network Analysis of Protein Structure Networks Upon Ligand Binding.
Degree: MS, Life Sciences, 2020, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_gradthes/5598
► Network analysis is a computational approach used to describe the structure and dynamics of complex systems.Residue-residue contacts that are made over the course of MD…
(more)
▼ Network analysis is a computational approach used to describe the
structure and dynamics of complex systems.Residue-residue contacts that are made over the course of MD simulations were used to create
protein structure networks (
PSNs). As a case study,
PSNs were generated for two
protein systems: the transcription factor constitutive androstane receptor and the enzyme ribonucleotide reductase. In order to understand the changes in residue-residue contacts induced upon ligand-binding in proteins, we performed topological analyses of three CAR systems and four RNR systems under different binding conditions.Four measures of centrality were used to evaluate structural changes between ligand-free and ligand-bound systems: betweenness, closeness, degree, and eigenvector centralities. Although ligand-binding induced contact rearrangements resulting in substantial changes in centrality values for many residues, the distributions of centrality values were generally very similar for all systems. Results obtained here suggested that closeness centrality primarily identifies residues that are physically central to the three-dimensional
structure of the
protein. Previous reports suggested that closeness centrality identifies important residues in enzyme active sites. However, this may only be true for enzymes whose active site is centrally located. Moreover, the distributions for degree centrality are not power-law distributed, which also raises the question of whether the power-law degree distribution should be assumed for all ”real-world”
networks. In summary, this work demonstrated that the centrality distributions for the two representative proteins are remarkably invariant to ligand binding, despite substantial changes in centrality values for residues.
Advisors/Committee Members: Albrecht von Arnim, Tongye Shen, Rachel McCord.
Subjects/Keywords: Graph theory; protein structure networks; protein dynamic networks; network analysis
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
foutch, d. (2020). Network Analysis of Protein Structure Networks Upon Ligand Binding. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/5598
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
foutch, david. “Network Analysis of Protein Structure Networks Upon Ligand Binding.” 2020. Thesis, University of Tennessee – Knoxville. Accessed January 23, 2021.
https://trace.tennessee.edu/utk_gradthes/5598.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
foutch, david. “Network Analysis of Protein Structure Networks Upon Ligand Binding.” 2020. Web. 23 Jan 2021.
Vancouver:
foutch d. Network Analysis of Protein Structure Networks Upon Ligand Binding. [Internet] [Thesis]. University of Tennessee – Knoxville; 2020. [cited 2021 Jan 23].
Available from: https://trace.tennessee.edu/utk_gradthes/5598.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
foutch d. Network Analysis of Protein Structure Networks Upon Ligand Binding. [Thesis]. University of Tennessee – Knoxville; 2020. Available from: https://trace.tennessee.edu/utk_gradthes/5598
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – San Diego
3.
Mih, Nathan Da-Wei.
Understanding genetic variation in the proteome: a multi-scale structural systems biology toolkit.
Degree: Bioinformatics & Systems Bio, 2018, University of California – San Diego
URL: http://www.escholarship.org/uc/item/6523m9mh
► The computational representation of metabolic networks has traditionally abstracted the representation of enzymatic components that catalyze their associated reactions. However, the long history of reductionism…
(more)
▼ The computational representation of metabolic networks has traditionally abstracted the representation of enzymatic components that catalyze their associated reactions. However, the long history of reductionism in studying biological components, specifically the three-dimensional structure of proteins, has resulted in a rich knowledgebase of experimental data and computational tools capable of describing atomic-level biochemical interactions and inferring functional consequences. The challenge of integrating such information into large-scale computational models of cells results in the intersection of structural and systems biology. This dissertation aims to explore and address the methodological issues that arise from the integration of these two fields, centered around the creation of a computational framework to answer the question of how best to utilize structural data in genome-scale models of metabolism. I present a software framework, ssbio, and an associated pipeline to simplify the integration process and allow the construction of high-quality genome-scale models with protein structures (GEM-PROs). The framework allows for the rigorous consideration and consolidation of the often repetitive or incomplete data of proteins in 3D space. Next, I explore a deep integration of molecular modeling tools into metabolic models to understand the impact of non-synonymous mutations on protein-ligand interactions within the human erythrocyte. I then show how these models provide utility in a comparative analysis of Escherichia coli and Thermotoga maritima by elucidating the impact of the structural proteome on the temperature dependence of growth, the distribution of protein fold families, and substrate specificity. Finally, I extend this framework to understand if hypothesized adaptations to oxidative stress are reflected in the structural proteomes of multiple strains of E. coli, along with the incorporation of a probabilistic model of oxidative damage based on selected structural features into a model of metabolism and protein synthesis. Overall, these studies represent the utility of a multi-scale approach to understanding how changes to the structural proteome can impact the system they participate in, along with providing the basis for future computational studies in structural systems biology.
Subjects/Keywords: Bioinformatics; metabolic networks; molecular dynamics; protein structure; structural biology; systems biology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mih, N. D. (2018). Understanding genetic variation in the proteome: a multi-scale structural systems biology toolkit. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/6523m9mh
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mih, Nathan Da-Wei. “Understanding genetic variation in the proteome: a multi-scale structural systems biology toolkit.” 2018. Thesis, University of California – San Diego. Accessed January 23, 2021.
http://www.escholarship.org/uc/item/6523m9mh.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mih, Nathan Da-Wei. “Understanding genetic variation in the proteome: a multi-scale structural systems biology toolkit.” 2018. Web. 23 Jan 2021.
Vancouver:
Mih ND. Understanding genetic variation in the proteome: a multi-scale structural systems biology toolkit. [Internet] [Thesis]. University of California – San Diego; 2018. [cited 2021 Jan 23].
Available from: http://www.escholarship.org/uc/item/6523m9mh.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mih ND. Understanding genetic variation in the proteome: a multi-scale structural systems biology toolkit. [Thesis]. University of California – San Diego; 2018. Available from: http://www.escholarship.org/uc/item/6523m9mh
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science
4.
Vijayabaskar, M S.
Protein-DNA Graphs And Interaction Energy Based Protein Structure Networks.
Degree: PhD, Faculty of Science, 2013, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/1904
► Proteins orchestrate a number of cellular processes either alone or in concert with other biomolecules like nucleic acids, carbohydrates, and lipids. They exhibit an intrinsic…
(more)
▼ Proteins orchestrate a number of cellular processes either alone or in concert with other biomolecules like nucleic acids, carbohydrates, and lipids. They exhibit an intrinsic ability to fold de novo to their functional states. The three–dimensional
structure of a
protein, dependent on its amino acid sequence, is important for its function. Understanding this sequence– structure–function relationship has become one of the primary goals in biophysics. Various experimental techniques like X–ray crystallography, Nuclear Magnetic Resonance (NMR), and site–directed mutagenesis have been used extensively towards this goal. Computational studies include mainly sequence based, and
structure based approaches. The sequence based approaches such as sequence alignments, phylogenetic analysis, domain identification, statistical coupling analysis etc., aim at deriving meaningful information from the primary sequence of the
protein. The
structure based approaches, on the other hand, use structures of folded proteins. Recent advances in
structure determination and efforts by various structural consortia have resulted in an enormous amount of structures available for analysis. Innumerable observations such as the allowed and disallowed regions in the conformations of a peptide unit, hydrophobic core in globular proteins, existence of regular secondary structures like helices, sheets, and turns and a limited fold space have been landmarks in understanding the characteristics of
protein structures.
The uniqueness of
protein structure is attained through non–covalent interactions among the constituent amino acids. Analyses of
protein structures show that different types of non–covalent interactions like hydrophobic interactions, hydrogen bonding, salt bridges, aromatic stacking, cation–π interactions, and solvent interactions hold
protein structures together. Although such
structure analyses have provided a wealth of information, they have largely been performed at a pair–wise level and an investigation involving such pair–wise interactions alone is not sufficient to capture all the determinants of
protein structures, since they happen at a global level. This consideration has led to the development of graphs/
networks for proteins.
Graphs or
Networks are a collection of nodes connected by edges.
Protein Structure Networks (
PSNs) can be constructed using various definitions of nodes and edges. Nodes may vary from atoms to secondary structures in Synopsis proteins, and the edges can range from simple atom–atom distances to distance between secondary structures. To study the interplay of amino acids in
structure formation, the most commonly used
PSNs consider amino acids as nodes. The criterion for edge definition, however, varies.
PSNs can be constructed at a course grain level by considering the distances between Cα/Cβ atoms, any side–chain atoms, or the centroids of the amino acids. At a finer level,
PSNs can be constructed using atomic details by considering the interaction types or by computing the extent of interaction between…
Advisors/Committee Members: Vishveshwara, Saraswathi (advisor).
Subjects/Keywords: Proteins-DNA Graphs (PDGs); Protein Structures; Protein Side–chain Networks (PScNs); Protein–DNA Graphs (PDGs); Protein Energy Networks (PENs); Dps; Mycobacterium smegmatis; Structure Network Analysis; Protein Structure Networks; GraProStr; Structure Networks; Biochemistry
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vijayabaskar, M. S. (2013). Protein-DNA Graphs And Interaction Energy Based Protein Structure Networks. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/1904
Chicago Manual of Style (16th Edition):
Vijayabaskar, M S. “Protein-DNA Graphs And Interaction Energy Based Protein Structure Networks.” 2013. Doctoral Dissertation, Indian Institute of Science. Accessed January 23, 2021.
http://etd.iisc.ac.in/handle/2005/1904.
MLA Handbook (7th Edition):
Vijayabaskar, M S. “Protein-DNA Graphs And Interaction Energy Based Protein Structure Networks.” 2013. Web. 23 Jan 2021.
Vancouver:
Vijayabaskar MS. Protein-DNA Graphs And Interaction Energy Based Protein Structure Networks. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2013. [cited 2021 Jan 23].
Available from: http://etd.iisc.ac.in/handle/2005/1904.
Council of Science Editors:
Vijayabaskar MS. Protein-DNA Graphs And Interaction Energy Based Protein Structure Networks. [Doctoral Dissertation]. Indian Institute of Science; 2013. Available from: http://etd.iisc.ac.in/handle/2005/1904

Indian Institute of Science
5.
Bhattacharyya, Moitrayee.
Probing Ligand Induced Perturbations In Protien Structure Networks : Physico-Chemical Insights From MD Simulations And Graph Theory.
Degree: PhD, Faculty of Science, 2014, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2341
► The fidelity of biological processes and reactions, inspite of the widespread diversity, is programmed by highly specific physico-chemical principles. This underlines our basic understanding of…
(more)
▼ The fidelity of biological processes and reactions, inspite of the widespread diversity, is programmed by highly specific physico-chemical principles. This underlines our basic understanding of different interesting phenomena of biological relevance, ranging from enzyme specificity to allosteric communication, from selection of fold to structural organization / states of oligomerization, from half-sites-reactivity to reshuffling of the conformational free energy landscape, encompassing the dogma of sequence-
structure dynamics-function of macromolecules. The role of striking an optimal balance between rigidity and flexibility in macromolecular 3D structural organisation is yet another concept that needs attention from the functional perspective. Needless to say that the variety of
protein structures and conformations naturally leads to the diversity of their function and consequently many other biological functions in general. Classical models of allostery like the ‘MWC model’ or the ‘KNF model’ and the more recently proposed ‘population shift model’ have advanced our understanding of the underlying principles of long range signal transfer in macromolecules. Extensive studies have also reported the importance of the fold selection and 3D structural organisation in the context of macromolecular function. Also ligand induced conformational changes in macromolecules, both subtle and drastic, forms the basis for controlling several biological processes in an ordered manner by re-organizing the free energy landscape.
The above mentioned biological phenomena have been observed from several different biochemical and biophysical approaches. Although these processes may often seem independent of each other and are associated with regulation of specialized functions in macromolecules, it is worthwhile to investigate if they share any commonality or interdependence at the detailed atomic level of the 3D structural organisation. So the nagging question is, do these diverse biological processes have a unifying theme, when probed at a level that takes into account even subtle re-orchestrations of the interactions and energetics at the
protein/nucleic acid side-chain level. This is a complex problem to address and here we have made attempts to examine this problem using computational tools. Two methods have been extensively applied: Molecular Dynamics (MD) simulations and network theory and related parameters. Network theory has been extensively used in the past in several studies, ranging from analysis of social
networks to systems level
networks in biology (e.g., metabolic
networks) and have also found applications in the varied fields of physics, economics, cartography and psychology. More recently, this concept has been applied to study the intricate details of the structural organisation in proteins, providing a local view of molecular interactions from a global perspective. On the other hand, MD simulations capture the dynamics of interactions and the conformational space associated with a given state (e.g., different…
Advisors/Committee Members: Vishveshwara, Saraswathi (advisor).
Subjects/Keywords: Protein Structure; Protein - Non Covalent Interactions; Nucleic Acids- Non Covalent Interactions; Bacterial LuxS Protein; Protein-Ligand Interactions; Protein Structure Networks; Proteins - Conformation; Allosteric Proteins; Energy-Weighted Network Formalism; Proteins - Allosterism; Protein Structure Network (PSN); Protein Structure Graph (PSN); Protein Complex Energy Network (PcEN); Biochemistry
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bhattacharyya, M. (2014). Probing Ligand Induced Perturbations In Protien Structure Networks : Physico-Chemical Insights From MD Simulations And Graph Theory. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2341
Chicago Manual of Style (16th Edition):
Bhattacharyya, Moitrayee. “Probing Ligand Induced Perturbations In Protien Structure Networks : Physico-Chemical Insights From MD Simulations And Graph Theory.” 2014. Doctoral Dissertation, Indian Institute of Science. Accessed January 23, 2021.
http://etd.iisc.ac.in/handle/2005/2341.
MLA Handbook (7th Edition):
Bhattacharyya, Moitrayee. “Probing Ligand Induced Perturbations In Protien Structure Networks : Physico-Chemical Insights From MD Simulations And Graph Theory.” 2014. Web. 23 Jan 2021.
Vancouver:
Bhattacharyya M. Probing Ligand Induced Perturbations In Protien Structure Networks : Physico-Chemical Insights From MD Simulations And Graph Theory. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2014. [cited 2021 Jan 23].
Available from: http://etd.iisc.ac.in/handle/2005/2341.
Council of Science Editors:
Bhattacharyya M. Probing Ligand Induced Perturbations In Protien Structure Networks : Physico-Chemical Insights From MD Simulations And Graph Theory. [Doctoral Dissertation]. Indian Institute of Science; 2014. Available from: http://etd.iisc.ac.in/handle/2005/2341

University of Rochester
6.
Yang, Na.
Algorithms for affective and ubiquitous sensing systems
and for protein structure prediction.
Degree: PhD, 2015, University of Rochester
URL: http://hdl.handle.net/1802/29666
► Rapid development in sensing technologies has facilitated increased design of more affective and ubiquitous sensing environments for humans. Through affective sensing of human emotions and…
(more)
▼ Rapid development in sensing technologies has
facilitated increased design of
more affective and ubiquitous
sensing environments for humans. Through affective
sensing of
human emotions and behaviors, devices can respond accordingly
to
provide the users with a better human-computer interaction
experience. While
affective sensing provides electronic devices
with a better understanding of humans,
ubiquitous sensing provides
humans with a better knowledge of their environments.
Wireless
sensor networks (WSNs) have been proposed for different
ubiquitous
sensing scenarios over the decades, and in-home monitoring is one
of
the successful examples that have been widely deployed.
Algorithms designed to
optimize such in-home sensor networks can
also be mapped to other domains.
In particular, the problem of
optimizing coverage in directional sensor networks
can be mapped
to the problem of predicting the structure of proteins, an
important
challenge for bioinformatics research that is needed for
effective drug
therapy design. In this dissertation, we contribute
algorithms to enable affective
and ubiquitous sensing systems as
well as algorithms to improve protein structure
prediction.
Accurate acquisition and interpretation of human physical signals
are two essential
components for affective sensing. In the first
part of this dissertation,
we develop a speech-based emotion
classification system, which uses several one against-
all support
vector machines with a threshold-based fusion mechanism to
combine
the individual outputs. A thorough performance evaluation of this
system
is provided for different test scenarios, including
classification using noisy speech
samples and samples from real
users. Results show that the system achieves a
six-emotion
decision-level correct classification rate of 80% for an acted
dataset
with clean speech. Applications for this proposed emotion
sensing system range
from behavior studies to context-aware
electronics design.
Fundamental frequency (F0) is one of the
speech features used for emotion
classification. However, noise is
inevitably included during the speech signal’s
acquisition. We
present a novel noise resilient F0 detection algorithm named BaNa
that combines the approaches of harmonic ratios and Cepstrum
analysis. We test
the performance of the proposed BaNa algorithm
using real human speech samples
corrupted by different types of
noise. Results show that for almost all types of
noise and
signal-to-noise ratio values investigated, BaNa achieves the lowest
Gross
Pitch Error rate among all the classic and state-of-the-art
algorithms.
In the second part of this dissertation, we study the
aforementioned in-home
monitoring problem, considering energy
efficiency for both the monitoring and
transmission processes. In
particular, we evaluate the performance of different
camera and
motion sensor placement strategies, and formulate optimization
problems
to achieve the minimum energy consumption, longest
network lifetime, or the
lowest monetary cost. In the image…
Subjects/Keywords: Affective computing; Emotion classification; Mood sensing; Protein structure prediction; Ubiquitous computing; Wireless sensor networks
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yang, N. (2015). Algorithms for affective and ubiquitous sensing systems
and for protein structure prediction. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/29666
Chicago Manual of Style (16th Edition):
Yang, Na. “Algorithms for affective and ubiquitous sensing systems
and for protein structure prediction.” 2015. Doctoral Dissertation, University of Rochester. Accessed January 23, 2021.
http://hdl.handle.net/1802/29666.
MLA Handbook (7th Edition):
Yang, Na. “Algorithms for affective and ubiquitous sensing systems
and for protein structure prediction.” 2015. Web. 23 Jan 2021.
Vancouver:
Yang N. Algorithms for affective and ubiquitous sensing systems
and for protein structure prediction. [Internet] [Doctoral dissertation]. University of Rochester; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1802/29666.
Council of Science Editors:
Yang N. Algorithms for affective and ubiquitous sensing systems
and for protein structure prediction. [Doctoral Dissertation]. University of Rochester; 2015. Available from: http://hdl.handle.net/1802/29666

University of South Carolina
7.
Cole, Casey Anne.
From Cellular to Holistic: Development of Algorithms to Study Human Health and Diseases.
Degree: PhD, Computer Science and Engineering, 2020, University of South Carolina
URL: https://scholarcommons.sc.edu/etd/5804
► The development of theoretical computational methods and their application has become widespread in the world today. In this dissertation, I present my work in…
(more)
▼ The development of theoretical computational methods and their application has become widespread in the world today. In this dissertation, I present my work in the creation of models to detect and describe complex biological and health related problems. The first major part of my work centers around the creation and enhancement of methods to calculate
protein structure and dynamics. To this end, substantial enhancement has been made to the software package REDCRAFT to better facilitate its usage in
protein structure calculation. The enhancements have led to an overall increase in its ability to characterize proteins under difficult conditions such as high noise and low data density. Secondly, a database that allows for easy and comprehensive mining of
protein structures has been created and deployed. We show preliminary results for its application to
protein structure calculation. This database, among other applications, can be used to create input sets for computational models for prediction of
protein structure. Lastly, I present my work on the creation of a theoretical model to describe discrete state
protein dynamics. The results of this work can be used to describe many real-world dynamic systems. The second major part of my work centers around the application of machine learning techniques to create a system for the automated detection of smoking using accelerometer data from smartwatches. The first aspect of this work that will be presented is binary detection of smoking puffs. This model was then expanded to perform full cigarette session detection. Next, the model was reformulated to perform quantification of smoking (such as puff duration and the time between puffs). Lastly, a rotational matrix was derived to resolve ambiguities of smartwatches due to position of the watch on the wrist.
Advisors/Committee Members: Homayoun Valafar.
Subjects/Keywords: Computer Sciences; Artificial Intelligence; Artificial Neural Networks; dynamics; human activity recognition; protein structure; smartwatches
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cole, C. A. (2020). From Cellular to Holistic: Development of Algorithms to Study Human Health and Diseases. (Doctoral Dissertation). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/5804
Chicago Manual of Style (16th Edition):
Cole, Casey Anne. “From Cellular to Holistic: Development of Algorithms to Study Human Health and Diseases.” 2020. Doctoral Dissertation, University of South Carolina. Accessed January 23, 2021.
https://scholarcommons.sc.edu/etd/5804.
MLA Handbook (7th Edition):
Cole, Casey Anne. “From Cellular to Holistic: Development of Algorithms to Study Human Health and Diseases.” 2020. Web. 23 Jan 2021.
Vancouver:
Cole CA. From Cellular to Holistic: Development of Algorithms to Study Human Health and Diseases. [Internet] [Doctoral dissertation]. University of South Carolina; 2020. [cited 2021 Jan 23].
Available from: https://scholarcommons.sc.edu/etd/5804.
Council of Science Editors:
Cole CA. From Cellular to Holistic: Development of Algorithms to Study Human Health and Diseases. [Doctoral Dissertation]. University of South Carolina; 2020. Available from: https://scholarcommons.sc.edu/etd/5804

Queens University
9.
Wathen, Brent.
Sequence and Structure Based Protein Folding Studies With Implications
.
Degree: Biochemistry, 2011, Queens University
URL: http://hdl.handle.net/1974/6802
► As the expression of the genetic blueprint, proteins are at the heart of all biological systems. The ever increasing set of available protein structures has…
(more)
▼ As the expression of the genetic blueprint, proteins are at the heart of all biological systems. The ever increasing set of available protein structures has taught us that diversity is the hallmark of their architecture, a fundamental characteristic that enables them to perform the vast array of functionality upon which all of life depends. This diversity, however, is central to one of the most challenging problems in molecular biology: how does a folding polypeptide chain navigate its way through all of the myriad of possible conformations to find its own particular biologically active form? With few overarching structural principles to draw upon that can be applied to all protein architecture, the search for a solution to the protein folding problem has yet to produce an algorithm that can explain and duplicate this fundamental biological process.
In this thesis, we take a two-pronged approach for investigating the protein folding process. Our initial statistical studies of the distributions of hydrophobic and hydrophilic residues within α-helices and β-sheets suggest (i) that hydrophobicity plays a critical role in helix and sheet formation; and (ii) that the nucleation of these motifs may result in largely unidirectional growth. Most tellingly, from an examination of the amino acids found in the smallest β-sheets, we do not find any evidence of a β-nucleating code in the primary protein sequence.
Complementing these statistical analyses, we have analyzed the structural environments of several ever-widening aspects of protein topology. Our examination of the gaps between strands in the smallest β-sheets reveals a common organizational principle underlying β-formation involving strands separated by large sequential gaps: with very few exceptions, these large gaps fold into single, compact structural modules, bringing the β-strands that are otherwise far apart in the sequence close together in space. We conclude, therefore, that β-nucleation in the smallest sheets results from the co-location of two strands that are either local in sequence, or local in space following prior folding events. A second study of larger β-sheets both corroborates and extends these findings: virtually all large sequential gaps between pairs of β-strands organize themselves into an hierarchical arrangement, creating a bread-crumb model of go-and-come-back structural organization that ultimately juxtaposes two strands of a parental β-structure that are far apart in the sequence in close spatial proximity. In a final study, we have formalized this go-and-come-back notion into the concept of anti-parallel double-strandedness (DS), and measure this property across protein architecture in general. With over 90% of all residues in a large, non-redundant set of protein structures classified as DS, we conclude that DS is a unifying structural principle that underpins all globular proteins. We postulate, moreover, that this one simple principle, anti-parallel double-strandedness, unites protein structure, protein folding and protein…
Subjects/Keywords: Protein Structure
;
Protein Folding
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Wathen, B. (2011). Sequence and Structure Based Protein Folding Studies With Implications
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/6802
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wathen, Brent. “Sequence and Structure Based Protein Folding Studies With Implications
.” 2011. Thesis, Queens University. Accessed January 23, 2021.
http://hdl.handle.net/1974/6802.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wathen, Brent. “Sequence and Structure Based Protein Folding Studies With Implications
.” 2011. Web. 23 Jan 2021.
Vancouver:
Wathen B. Sequence and Structure Based Protein Folding Studies With Implications
. [Internet] [Thesis]. Queens University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1974/6802.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wathen B. Sequence and Structure Based Protein Folding Studies With Implications
. [Thesis]. Queens University; 2011. Available from: http://hdl.handle.net/1974/6802
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University
10.
Ahmed, Hazem Radwan A.
Pattern Discovery in Protein Structures and Interaction Networks
.
Degree: Computing, 2014, Queens University
URL: http://hdl.handle.net/1974/12051
► Pattern discovery in protein structures is a fundamental task in computational biology, with important applications in protein structure prediction, profiling and alignment. We propose a…
(more)
▼ Pattern discovery in protein structures is a fundamental task in computational biology, with important applications in protein structure prediction, profiling and alignment. We propose a novel approach for pattern discovery in protein structures using Particle Swarm-based flying windows over potentially promising regions of the search space. Using a heuristic search, based on Particle Swarm Optimization (PSO) is, however, easily trapped in local optima due to the sparse nature of the problem search space. Thus, we introduce a novel fitness-based stagnation detection technique that effectively and efficiently restarts the search process to escape potential local optima.
The proposed fitness-based method significantly outperforms the commonly-used distance-based method when tested on eight classical and advanced (shifted/rotated) benchmark functions, as well as on two other applications for proteomic pattern matching and discovery. The main idea is to make use of the already-calculated fitness values of swarm particles, instead of their pairwise distance values, to predict an imminent stagnation situation. That is, the proposed fitness-based method does not require any computational overhead of repeatedly calculating pairwise distances between all particles at each iteration. Moreover, the fitness-based method is less dependent on the problem search space, compared with the distance-based method.
The proposed pattern discovery algorithms are first applied to protein contact maps, which are the 2D compact representation of protein structures. Then, they are extended to work on actual protein 3D structures and interaction networks, offering a novel and low-cost approach to protein structure classification and interaction prediction. Concerning protein structure classification, the proposed PSO-based approach correctly distinguishes between the positive and negative examples in two protein datasets over 50 trials. As for protein interaction prediction, the proposed approach works effectively on complex, mostly sparse protein interaction networks, and predicts high-confidence protein-protein interactions — validated by more than one computational and experimental source — through knowledge transfer between topologically-similar interaction patterns of close proximity.
Such encouraging results demonstrate that pattern discovery in protein structures and interaction networks are promising new applications of the fast-growing and far-reaching PSO algorithms, which is the main argument of this thesis.
Subjects/Keywords: 3D Structural Motif Matching
;
Protein Structure Classification
;
Protein Structure Alignment
;
Protein Interaction Networks
;
Protein-Protein Interaction Prediction
;
Multi-Start Particle Swarm Optimization
;
Fitness-based Agile Restart
;
Efficient Stagnation Detection
;
Proteomic Pattern Matching and Discovery
;
Protein Contact Maps
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ahmed, H. R. A. (2014). Pattern Discovery in Protein Structures and Interaction Networks
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/12051
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ahmed, Hazem Radwan A. “Pattern Discovery in Protein Structures and Interaction Networks
.” 2014. Thesis, Queens University. Accessed January 23, 2021.
http://hdl.handle.net/1974/12051.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ahmed, Hazem Radwan A. “Pattern Discovery in Protein Structures and Interaction Networks
.” 2014. Web. 23 Jan 2021.
Vancouver:
Ahmed HRA. Pattern Discovery in Protein Structures and Interaction Networks
. [Internet] [Thesis]. Queens University; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1974/12051.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ahmed HRA. Pattern Discovery in Protein Structures and Interaction Networks
. [Thesis]. Queens University; 2014. Available from: http://hdl.handle.net/1974/12051
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Cottat, Maximilien.
Optimisation de nanostructures plasmoniques pour la détection et la caractérisation structurelle des protéines par Diffusion Raman Exaltée de Surface : Optimization of plasmonics nanostructures for detection and characterization of proteins structure by Surface Enhanced Raman Scattering.
Degree: Docteur es, Physique, 2014, Paris 13
URL: http://www.theses.fr/2014PA132049
► Les protéines jouent un rôle important dans les cellules, via leur activité enzymatique et les interactions qu’elles mettent en jeu. Ces fonctions sont principalement basées…
(more)
▼ Les protéines jouent un rôle important dans les cellules, via leur activité enzymatique et les interactions qu’elles mettent en jeu. Ces fonctions sont principalement basées sur la structure des protéines. Afin de détecter leur présence, et de caractériser leur structure, nous nous sommes appuyés sur les propriétés optiques des nanostructures. La résonance des plasmons de surface localisés (RPSL), ainsi que la diffusion Raman exaltée de surface(DRES), nous ont permis de détecter différentes protéines. Une optimisation des nanostructures nous a également permis de concevoir un biocapteur basé sur la DRES, qui soit sensible, reproductible et spécifique. En effet, la détection spécifique d’un biomarqueur pathologique, la protéine Manganèse Super Oxide Dismutase (MnSOD), a été réalisée grâce à l’utilisation de nanostructures optimisées et fonctionnalisées avec un aptamère (séquence ADN). Avec ce système, nous avons démontré la détection de la MnSOD à des concentrations physiologiques dans des fluides corporels comme le sérum et la salive. Enfin, l’étude de la structure de la protéine Spleen Tyrosine kinase (Syk), par DRES, nous a permis de mettre en évidence un réarrangement structurale de Syk lors de sa phosphorylation. Une étude complémentaire par Western Blot montre que son activité kinase est dépendante de son état de phosphorylation indiquant que la structure et l’activité de Syk sont liées. L’ensemble de ces travaux contribue à une meilleure connaissance de l’interface entre la physique et la biologie.
Proteins play an important role in cells via their enzymatic activity and the irinteractions. Their functions are mainly based on the protein structure. In order to detect their presence and to characterize their structure, we used optical properties of nanostructures. The localized surface plasmon resonance (LSPR), as well as the surface enhanced Raman scattering (SERS), allowed us to detect various proteins. We also optimized nanostructures to build a sensitive, reproducible and specific biosensor based on SERS. Indeed, specific detection of one pathological biomarker, the Manganese Super Oxide Dismutase (MnSOD) protein, was investigated by using optically optimized and aptamer-functionalized nanostructures. Using this system, we were able to detect the MnSOD at physiological concentration in body fluids, such as serum and saliva. Finally, the structural study of the Spleen Tyrosine kinase (Syk) protein by SERS, allowed us to demonstrate that its structure varied with its phosphorylation levels. A complementary Western Blot analysis showed that the Syk kinase activity depended also on its phosphorylation state, meaning that the structure and the activity of Syk were linked. Altogether, these data contributed to a better understanding of the interface between physics and biology.
Advisors/Committee Members: Lamy de la Chapelle, Marc (thesis director), Le Roy, Christine (thesis director), Lidgi, Nathalie (thesis director).
Subjects/Keywords: Protéines / structure; Protein / structure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cottat, M. (2014). Optimisation de nanostructures plasmoniques pour la détection et la caractérisation structurelle des protéines par Diffusion Raman Exaltée de Surface : Optimization of plasmonics nanostructures for detection and characterization of proteins structure by Surface Enhanced Raman Scattering. (Doctoral Dissertation). Paris 13. Retrieved from http://www.theses.fr/2014PA132049
Chicago Manual of Style (16th Edition):
Cottat, Maximilien. “Optimisation de nanostructures plasmoniques pour la détection et la caractérisation structurelle des protéines par Diffusion Raman Exaltée de Surface : Optimization of plasmonics nanostructures for detection and characterization of proteins structure by Surface Enhanced Raman Scattering.” 2014. Doctoral Dissertation, Paris 13. Accessed January 23, 2021.
http://www.theses.fr/2014PA132049.
MLA Handbook (7th Edition):
Cottat, Maximilien. “Optimisation de nanostructures plasmoniques pour la détection et la caractérisation structurelle des protéines par Diffusion Raman Exaltée de Surface : Optimization of plasmonics nanostructures for detection and characterization of proteins structure by Surface Enhanced Raman Scattering.” 2014. Web. 23 Jan 2021.
Vancouver:
Cottat M. Optimisation de nanostructures plasmoniques pour la détection et la caractérisation structurelle des protéines par Diffusion Raman Exaltée de Surface : Optimization of plasmonics nanostructures for detection and characterization of proteins structure by Surface Enhanced Raman Scattering. [Internet] [Doctoral dissertation]. Paris 13; 2014. [cited 2021 Jan 23].
Available from: http://www.theses.fr/2014PA132049.
Council of Science Editors:
Cottat M. Optimisation de nanostructures plasmoniques pour la détection et la caractérisation structurelle des protéines par Diffusion Raman Exaltée de Surface : Optimization of plasmonics nanostructures for detection and characterization of proteins structure by Surface Enhanced Raman Scattering. [Doctoral Dissertation]. Paris 13; 2014. Available from: http://www.theses.fr/2014PA132049
12.
Muley, Vijaykumar Yogesh.
Improved computational prediction and analysis of protein
- protein interaction networks.
Degree: 2012, Manipal University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/5399
► Recent progress in computational methods for predicting physical and functional protein-protein interactions has provided new insights into the complexity of biological processes. Most of these…
(more)
▼ Recent progress in computational methods for
predicting physical and functional protein-protein interactions has
provided new insights into the complexity of biological processes.
Most of these methods assume that functionally interacting proteins
are likely to have a shared evolutionary history. These methods
include phylogenetic profiling (PP),gene neighborhood (GN), gene
cluster (GC), and the mirrortree. Expression similarity in various
physiological conditions also has been used an indicator of
functional linkages between genes. Comprehensive newlinecomparison
of these methods has not been frequently reported in literature. In
this work, I have shown that the higher performance for predicting
protein-protein interactions was achievable even with 100?150
bacterial genomes out of 565 genomes. I find that variants of PP
and GN are robust against reference genome selection. This study
also reveals that the prediction of metabolic pathway protein
interactions continues to be a challenging task for all methods
which possibly reflect flexible/independent evolutionary histories
of these proteins. On the contrary, genetic information processing
pathways are predicted with comparable accuracy. I have also shown
that the effective use of a particular prediction method depends on
the pathway under investigation. The topological properties of
network predicted by each method differ significantly. This study
suggests that organization of proteins in the predicted networks
ensure the local perturbations in the metabolic pathways and
protein complexes should communicate with quickly to other cellular
proteins. A set of seven machine learning classifiers also used to
predict genome-scale interactome. It is observed that probabilistic
classifiers such as naïve bayes are best suitable for PPI
prediction task. Finally, I have predicted functions for number of
uncharacterized proteins and some of them tested experimentally. A
high quality PPIs can be accessible through user friendly interface
at http://www.cdfd.org.in/ecofunppi
References p. 138-150, Appendix p.
151-157
Advisors/Committee Members: Ranjan, Akash.
Subjects/Keywords: Protein interaction networks; Protein
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Muley, V. Y. (2012). Improved computational prediction and analysis of protein
- protein interaction networks. (Thesis). Manipal University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/5399
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Muley, Vijaykumar Yogesh. “Improved computational prediction and analysis of protein
- protein interaction networks.” 2012. Thesis, Manipal University. Accessed January 23, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/5399.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Muley, Vijaykumar Yogesh. “Improved computational prediction and analysis of protein
- protein interaction networks.” 2012. Web. 23 Jan 2021.
Vancouver:
Muley VY. Improved computational prediction and analysis of protein
- protein interaction networks. [Internet] [Thesis]. Manipal University; 2012. [cited 2021 Jan 23].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/5399.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Muley VY. Improved computational prediction and analysis of protein
- protein interaction networks. [Thesis]. Manipal University; 2012. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/5399
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
13.
Cui, Xuefeng.
Finding Similar Protein Structures Efficiently and Effectively.
Degree: 2014, University of Waterloo
URL: http://hdl.handle.net/10012/8349
► To assess the similarities and the differences among protein structures, a variety of structure alignment algorithms and programs have been designed and implemented. We introduce…
(more)
▼ To assess the similarities and the differences among protein structures, a
variety of structure alignment algorithms and programs have been designed and
implemented. We introduce a low-resolution approach and a high-resolution
approach to evaluate the similarities among protein structures. Our results
show that both the low-resolution approach and the high-resolution approach
outperform state-of-the-art methods.
For the low-resolution approach, we eliminate false positives through the
comparison of both local similarity and remote similarity with little
compromise in speed. Two kinds of contact libraries (ContactLib) are introduced
to fingerprint protein structures effectively and efficiently. Each contact
group from the contact library consists of one local or two remote fragments
and is represented by a concise vector. These vectors are then indexed and used
to calculate a new combined hit-rate score to identify similar protein
structures effectively and efficiently.
We tested our ContactLibs on the high-quality protein structure subset of
SCOP30, which contains 3,297 protein structures. For each protein structure
of the subset, we retrieved its neighbor protein structures from the rest of
the subset. The best area under the ROC curve, archived by a ContactLib, is as
high as 0.960. This is a significant improvement over 0.747, the best
result achieved by the state-of-the-art method, FragBag.
For the high-resolution approach, our PROtein STructure Alignment method
(PROSTA) relies on and verifies the fact that the optimal protein structure
alignment always contains a small subset of aligned residue pairs, called a
seed, such that the rotation and translation (ROTRAN), which minimizes the RMSD
of the seed, yields both the optimal ROTRAN and the optimal alignment score.
Thus, ROTRANs minimizing the RMSDs of small subsets of residues are sampled,
and global alignments are calculated directly from the sampled ROTRANs.
Moreover, our method incorporates remote information and filters similar
ROTRANs (or alignments) by clustering, rather than by an exhaustive method, to
overcome the computational inefficiency.
Our high-resolution protein structure alignment method, when applied to
optimizing the TM-score and the GDT-TS score, produces a significantly better
result than state-of-the-art protein structure alignment methods.
Specifically, if the highest TM-score found by TM-align is lower than 0.6 and
the highest TM-score found by one of the tested methods is higher than 0.5,
our alignment method tends to discover better protein structure alignments with
(up to 0.21) higher TM-scores. In such cases, TM-align fails to find TM-scores
higher than 0.5 with a probability of 42%; however, our alignment method
fails the same task with a probability of only 2%.
In addition, existing protein structure alignment scoring functions focus on
atom coordinate similarity alone and simply ignore other important
similarities, such as sequence similarity. Our scoring function has the
capacity…
Subjects/Keywords: Bioinformatics; Protein Structure Retrieval; Protein Structure Alignment
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cui, X. (2014). Finding Similar Protein Structures Efficiently and Effectively. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/8349
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cui, Xuefeng. “Finding Similar Protein Structures Efficiently and Effectively.” 2014. Thesis, University of Waterloo. Accessed January 23, 2021.
http://hdl.handle.net/10012/8349.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cui, Xuefeng. “Finding Similar Protein Structures Efficiently and Effectively.” 2014. Web. 23 Jan 2021.
Vancouver:
Cui X. Finding Similar Protein Structures Efficiently and Effectively. [Internet] [Thesis]. University of Waterloo; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10012/8349.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cui X. Finding Similar Protein Structures Efficiently and Effectively. [Thesis]. University of Waterloo; 2014. Available from: http://hdl.handle.net/10012/8349
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rice University
14.
Cheng, Yushao.
Template-based Protein Structure Prediction and its Applications.
Degree: PhD, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/76475
► Protein structure prediction, also called protein folding, is one of the most significant and challenging research areas in computational biophysics and structural bioinformatics. With the…
(more)
▼ Protein structure prediction, also called
protein folding, is one of the most significant and challenging research areas in computational biophysics and structural bioinformatics. With the rapid growth of PDB database, template-based modeling such as homology modeling and threading has become a popular method in
protein structure prediction. However, it is still hard to detect good templates when the sequence identity is below 30%. In chapter 1, a profile-profile alignment method is proposed. It uses evolutionary and structural profiles to detect homologs, and a z-score-based method to rank templates. The performance of this method in the critical assessment of
protein structure prediction experiments (CASP) was reported.
In chapter 2, p53 mutations are studied as an application of
protein structure prediction. The TP53 gene encodes a tumor suppressor
protein called p53, and p53 mutations occur in about half of human cancers. Experimental studies showed that p53 cancer mutants can be reactivated by mutations on other sites. Machine learning technologies were used in this research. Multiple classifiers were built to predict whether a p53 mutant (single-point or multiple-point) would be transcriptionally active or not, based on features extracted from amino acid sequences and structures. The mutant structures were modeled using template-based
protein structure prediction. Theses features were selected and analyzed using different feature selection methods, and classifiers were built under different learning settings, such as supervised learning and semi-supervised learning. The performances of these classifiers were analyzed and compared.
Besides the study of single proteins,
protein complexes in yeast are studied in chapter 3. Multiple classifiers were built to predict whether several given proteins can form a
protein complex, based on features generated from amino acid sequences and
protein-protein interaction network. Theses features were selected and analyzed using different feature selection methods. Also, these classifiers were built under different learning settings, such as supervised learning and active learning. The performances of these classifiers were analyzed and compared.
Advisors/Committee Members: Ma, Jianpeng (advisor), Diehl, Michael R. (committee member), Tao, Yizhi Jane (committee member).
Subjects/Keywords: Protein structure prediction
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cheng, Y. (2013). Template-based Protein Structure Prediction and its Applications. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/76475
Chicago Manual of Style (16th Edition):
Cheng, Yushao. “Template-based Protein Structure Prediction and its Applications.” 2013. Doctoral Dissertation, Rice University. Accessed January 23, 2021.
http://hdl.handle.net/1911/76475.
MLA Handbook (7th Edition):
Cheng, Yushao. “Template-based Protein Structure Prediction and its Applications.” 2013. Web. 23 Jan 2021.
Vancouver:
Cheng Y. Template-based Protein Structure Prediction and its Applications. [Internet] [Doctoral dissertation]. Rice University; 2013. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1911/76475.
Council of Science Editors:
Cheng Y. Template-based Protein Structure Prediction and its Applications. [Doctoral Dissertation]. Rice University; 2013. Available from: http://hdl.handle.net/1911/76475
15.
Gravina, Lucia Concetta.
Imunohistochemical profile of the neuroblasts of the peripheral sympathetic nervous system and human neuroblastoma of childhood.
Degree: 2014, Università degli Studi di Catania
URL: http://hdl.handle.net/10761/1537
► ABSTRACT I focused on the analysis of a protein involved in the development of the peripheral nervous system: the Wilms tumor1 (WT1). My thesis is…
(more)
▼ ABSTRACT
I focused on the analysis of a protein involved in the development of the peripheral nervous system: the Wilms tumor1 (WT1).
My thesis is divided into two experimental phases: I) spatio-temporal distribution of WT1 during human embryonic development, II) expression and functional roles of WT1 during development of the peripheral sympathetic nervous system and gastrointestinal tract.
The Wilms tumor (WT1) gene and its protein product are known to exhibit a dynamic expression profile during development and in the adult organism. Apart from a nuclear expression observed in the urogenital system, its precise localization in other developing human tissues is still largely unknown. Accordingly, the aim of this study was to investigate immunohistochemically the temporal and spatial distribution of WT1 in epithelial and mesenchymal developing human tissues from gestational weeks 7 24. For this purpose we used antibodies against the N-terminal of WT1. As might be expected, WT1 nuclear expression was observed in mesonephric/metanephric glomeruli, metanephric blastema, celomderived membranes (pleura, peritoneum, serosal surfaces) and sex cords. With regard to mesenchymal tissues, a similar nuclear staining was also obtained in the mesenchyme surrounding Müllerian and Wolffian ducts, as well as in the submesothelial mesenchymal cells of all celomatic-derived membranes. The most striking finding was the detection of strong WT1 cytoplasmic immunostaining in developing skeletal and cardiac muscle cells and endothelial cells. The tissue-specific expression of WT1, together with its different nuclear/cytoplasmic localization, both suggest that WT1 protein may have shuttling properties, acting as a protein with complex regulator activity in transcriptional/translation processes during human ontogenesis. The reported cytoplasmic expression of WT1 in human rhabdomyosarcomas and in many vascular tumors strongly suggests an oncofetal expression of this protein. Although not specific, WT1 cytoplasmic expression can be used as a marker of skeletal muscle and endothelial differentiation in an appropriate morphological context. Developmental expression of Wilms tumor gene (WT1) and protein is crucial for cell proliferation, apoptosis, differentiation and cytoskeletal architecture regulation. More recently, it has been suggested a potential role of WT1 in the development of neural tissue and in neurodegenerative disorders. We have investigated immunohistochemically the developmentally regulated expression and distribution of WT1 in human fetal (from the 8th to the 28th week gestational age) peripheral sympathetic nervous system (PSNS) and gastro-enteric nervous system (GENS). Interestingly WT1 expression was restricted to the cytoplasm of sympathetic neuroblasts, while it progressively disappeared with advancing morphologic differentiation of these cells along both ganglionic and chromaffin cell lineages. In adult tissues, both ganglion and chromaffin cells lacked any WT1 expression. These findings show that WT1 is a reliable…
Subjects/Keywords: Area 06 - Scienze mediche; WT1, developing, PSNS
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gravina, L. C. (2014). Imunohistochemical profile of the neuroblasts of the peripheral sympathetic nervous system and human neuroblastoma of childhood. (Thesis). Università degli Studi di Catania. Retrieved from http://hdl.handle.net/10761/1537
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gravina, Lucia Concetta. “Imunohistochemical profile of the neuroblasts of the peripheral sympathetic nervous system and human neuroblastoma of childhood.” 2014. Thesis, Università degli Studi di Catania. Accessed January 23, 2021.
http://hdl.handle.net/10761/1537.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gravina, Lucia Concetta. “Imunohistochemical profile of the neuroblasts of the peripheral sympathetic nervous system and human neuroblastoma of childhood.” 2014. Web. 23 Jan 2021.
Vancouver:
Gravina LC. Imunohistochemical profile of the neuroblasts of the peripheral sympathetic nervous system and human neuroblastoma of childhood. [Internet] [Thesis]. Università degli Studi di Catania; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10761/1537.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gravina LC. Imunohistochemical profile of the neuroblasts of the peripheral sympathetic nervous system and human neuroblastoma of childhood. [Thesis]. Università degli Studi di Catania; 2014. Available from: http://hdl.handle.net/10761/1537
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Georgia
16.
Buchner, John Michael.
Structural and functional analysis of a novel recombinase.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/24839
► The DNA site-specific invertase Piv catalyzes the inversion of a 2.1 kb segment in Moraxella lacunata and Moraxella bovis altering the expression of type 4…
(more)
▼ The DNA site-specific invertase Piv catalyzes the inversion of a 2.1 kb segment in Moraxella lacunata and Moraxella bovis altering the expression of type 4 pilin genes in two phases. The switch is a biphasic system, alternating between
expression the tfpI and tfpQ pilin genes. In M. lacunata this switch is an on/off phase variation. Outside but adjacent to the invertible region, piv encodes the DNA invertase (Piv) that interacts with invL and invR as the loci of recombination. Other
sites of Piv DNA binding have been observed, and one, sub1, has been characterized. Piv does not have homology with the traditional site-specific tyrosine or serine recombinases. Instead, Piv has homology to the transposases of the IS110/IS492 family of
insertion elements. Modeling of Piv revealed three structures of interest: 1) the ribonuclease H-like fold, a catalytic domain associated with DDE-motif transposases, retroviral integrases, and RuvC Holliday junction resolvases, 2) a potential leucine
zipper that could be the site of protein dimerization, 3) a predicted helix-hairpin-helix (HhH) DNA binding motif, best studied in RuvA, a protein that binds Holliday junctions in a non sequence-specific manner. We determined that four acidic residues
that are conserved among Piv and the recombinases of the IS110/IS492 family of recombinases are required for catalysis of inversion and comprise a DEDD motif in Piv like that of RuvC. There was no requirement for the predicted leucine zipper in our in
vivo inversion system. We also mutated residues that are conserved in a consensus HhH sequence and observed that they are required for DNA inversion and may play a role in binding to Holliday junctions in vitro. Through electrophoretic mobility shift
assays, we observed an affinity of Piv for Holliday junctions and branched DNA substrates containing mismatched DNA. This leads us to our hypothesis: Piv is unique among enzymes in that it is a site-specific invertase that catalyzes recombination through
hydrolysis and transesterification, like the DDE-motif transposases, and generates a Holliday junction intermediate that is resolved by Piv with a pair of hydrolysis reactions, like RuvC.
Subjects/Keywords: Predicted Structure; Protein Structure; Tertiary Structure
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Buchner, J. M. (2014). Structural and functional analysis of a novel recombinase. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/24839
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Buchner, John Michael. “Structural and functional analysis of a novel recombinase.” 2014. Thesis, University of Georgia. Accessed January 23, 2021.
http://hdl.handle.net/10724/24839.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Buchner, John Michael. “Structural and functional analysis of a novel recombinase.” 2014. Web. 23 Jan 2021.
Vancouver:
Buchner JM. Structural and functional analysis of a novel recombinase. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10724/24839.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Buchner JM. Structural and functional analysis of a novel recombinase. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/24839
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science
17.
Swapna, L S.
Structural And Evolutionary Studies On Protein-Protein Interactions.
Degree: PhD, Faculty of Science, 2014, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2316
► The last few decades have witnessed an upsurge in the availability of large-scale data on genomes and genome-scale information. The development of methods to understand…
(more)
▼ The last few decades have witnessed an upsurge in the availability of large-scale data on genomes and genome-scale information. The development of methods to understand the trends and patterns from large scale data promised potentially to unravel the mechanisms responsible for the enormous diversity observed in biological systems. Of the many mechanisms adopted,
protein-protein interactions represent one of the commonly adopted mechanisms to achieve functional diversity using a limited genetic repertoire.
Protein-proteins interactions bring about several fundamental cellular processes and also modulate regulation at the cellular level. Different types of
protein-protein interactions have evolved to carry out myriad functions in a cell. Mainly, interactions can be permanent or transient in nature, depending on the duration of interaction. In terms of affinity ,they are classified as obligate or non-obligate interactions. Structural studies on the various kinds of complexes have enabled the identification of the distinctive features characterizing the different types of complexes. Further, identifying the mechanisms involved in the evolution of
protein-protein interactions are important in understanding the forces involved in their maintenance. Such studies also provide clues for the development of methods to predict
protein-protein interactions from the large repertoire of sequence and structural data available.
In spite of significant understanding of various aspects of
protein-protein interactions, several questions still remain unanswered. The work embodied in this thesis studies two main aspects of
protein-protein interactions for various types of complexes: structural and evolutionary features. The first part of the thesis(comprising of chapters 2,3,4 and 5) involves structural studies on the following features of
protein-protein interactions: structural change, flexibility, symmetry, and residue conservation. The second part of the thesis(comprising of chapters 6,7,8 and 9) involves study of evolutionary aspects of
protein-protein interactions, based on both large-scale data as well as case studies.
Chapter1 provides a background and literature survey of the area of
protein-protein interactions. The different classification schemes commonly used for describing the various
protein-protein interactions are outlined. The key small-scale and large-scale experimental methods used for the identification of
protein-protein interactions are described along with the details of the databases storing such experimentally derived information. Further, a comprehensive account of structural and evolutionary studies performed so far using the available data is provided. The computational(prediction)methods developed to address various aspects of
protein-protein interactions are also outlined. In addition, the importance of
protein-protein interactions in the context of diseases and the development of methods used to inhibit these interactions are discussed. Finally, the efforts towards design of
protein-protein interactions…
Advisors/Committee Members: Srinivasan, N (advisor).
Subjects/Keywords: Protein-Protein Interactions; Protein-Protein Complexes; Protein-Protein Structure; Homodimeric Proteins; Transient Protein-Protein Complexes; Protein-Protein Interactions - Structure; Protein-Protein Interactions - Evolution; Protein-Protein Interfaces; RNA Polymerase; Biochemistry
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Swapna, L. S. (2014). Structural And Evolutionary Studies On Protein-Protein Interactions. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2316
Chicago Manual of Style (16th Edition):
Swapna, L S. “Structural And Evolutionary Studies On Protein-Protein Interactions.” 2014. Doctoral Dissertation, Indian Institute of Science. Accessed January 23, 2021.
http://etd.iisc.ac.in/handle/2005/2316.
MLA Handbook (7th Edition):
Swapna, L S. “Structural And Evolutionary Studies On Protein-Protein Interactions.” 2014. Web. 23 Jan 2021.
Vancouver:
Swapna LS. Structural And Evolutionary Studies On Protein-Protein Interactions. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2014. [cited 2021 Jan 23].
Available from: http://etd.iisc.ac.in/handle/2005/2316.
Council of Science Editors:
Swapna LS. Structural And Evolutionary Studies On Protein-Protein Interactions. [Doctoral Dissertation]. Indian Institute of Science; 2014. Available from: http://etd.iisc.ac.in/handle/2005/2316

Indian Institute of Science
18.
Gadiyaram, Vasundhara.
Graph Spectral Methods for Analysis of Protein Structures.
Degree: PhD, Faculty of Science, 2019, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/4280
► Network representation of protein structures is an information-rich mode of examining protein structure, dynamics and its interactions with biomolecules. Graph spectral methods are extremely useful…
(more)
▼ Network representation of
protein structures is an information-rich mode of examining
protein structure, dynamics and its interactions with biomolecules. Graph spectral methods are extremely useful and powerful in analysing complex
networks. This thesis is concerned with development of graph spectral methods for analysing
networks and applying them to
protein structure analysis. Some of the key problems of network science that are addressed here are network similarity assessment and identification of key components in
networks. A new network similarity score (NSS) has been developed and has shown to be useful in comparing different
networks considering both local and global changes. The applicability of this scoring scheme as a
protein structure model validation tool has been demonstrated using models from various sources such as CASP experiments, mutant structures and molecular simulation trajectories. Also, a method to identify nodes and edges crucial in the network has been developed using NSS and perturbation analysis.
Although the methods developed in the thesis are inspired by the topology and functions related to
protein structures, they are general and are applicable to problems in many other disciplines.
Advisors/Committee Members: Vishveshwara, Saraswathi (advisor), Chandra, Nagasuma (advisor), Ananthasuresh, G K (advisor).
Subjects/Keywords: Protein Structure Networks (PSN); Spectral Theory; Protein Structure Models; Spectral Graph Theory; G-Protein Coupled Receptors; Graph Spectral Method; Correspondence Score (CRS); Eigenvalue-Weighted Cosine Score (EWCS); Eigenvalue-Weighted Cosine Score (EWCS); Network Similarity Score (NSS); Mathematics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gadiyaram, V. (2019). Graph Spectral Methods for Analysis of Protein Structures. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/4280
Chicago Manual of Style (16th Edition):
Gadiyaram, Vasundhara. “Graph Spectral Methods for Analysis of Protein Structures.” 2019. Doctoral Dissertation, Indian Institute of Science. Accessed January 23, 2021.
http://etd.iisc.ac.in/handle/2005/4280.
MLA Handbook (7th Edition):
Gadiyaram, Vasundhara. “Graph Spectral Methods for Analysis of Protein Structures.” 2019. Web. 23 Jan 2021.
Vancouver:
Gadiyaram V. Graph Spectral Methods for Analysis of Protein Structures. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2019. [cited 2021 Jan 23].
Available from: http://etd.iisc.ac.in/handle/2005/4280.
Council of Science Editors:
Gadiyaram V. Graph Spectral Methods for Analysis of Protein Structures. [Doctoral Dissertation]. Indian Institute of Science; 2019. Available from: http://etd.iisc.ac.in/handle/2005/4280

Wayne State University
19.
Holcomb, Joshua.
Structural Basis Of Membrane Protein Scaffolding And Signaling In Human Disease.
Degree: PhD, Biochemistry and Molecular Biology, 2017, Wayne State University
URL: https://digitalcommons.wayne.edu/oa_dissertations/1809
► Protein structural elucidation by means of X-ray crystallography is a powerful approach for both insight into a proteins biophysical properties and function. To date…
(more)
▼ Protein structural elucidation by means of X-ray crystallography is a powerful approach for both insight into a proteins biophysical properties and function. To date X-ray crystallography remains the gold standard in high resolution structural determination and serves as the basis for rational drug design for the purpose of combating a number of human diseases. Such an approach also allows for the exploitation of how various proteins interact with their substrates providing a molecular basis for their physiological function. In this dissertation, using X-ray crystallographic analysis along with other biophysical characterization methods, we seek to understand the mechanistic foundation for which scaffolding proteins such as NHERF1 and NHERF2 interact with their substrates in which leads to a wide variety of critical cellular events. Additionally, we attempt elucidate the
structure and function of a recently identified membrane
protein, NgBR, with hopes to understand the molecular basis in which it influences the activation of the infamous oncoprotein Ras.
Protein scaffolding is a term that denotes the coming together of two or more proteins in which results in the formation of macromolecular complexes. Such events are known to regulate several cellular processes including membrane
protein recycling,
protein stabilization, cell to cell adhesion, and regulation of signaling pathways. There are several families of scaffolding proteins with one of the most known to be the PDZ domain containing family. Two proteins within this family, NHERF1 and NHERF2, contain two PDZ domains in which are responsible for a variety of signaling events. The second PDZ domain of NHERF1 has been shown to complex with chemokine receptor CXCR2 and mediate the formation of the CXCR2-NHERF1-PLCβ2 complex. This complex formation has been shown to be influential in chemokine induced neutrophil migration and infiltration in regions of inflammation leading to the exacerbation of a variety of inflammatory diseases. Additionally, the first PDZ domain of NHERF2 has been shown to mediate the scaffolding of the CFTR-NHERF2-LAP2 complex which has been shown to inhibit CFTR activity by the LPA2 mediated inhibition of adenylate cyclase. Furthermore, disruption of this complex has been shown to be enough to augment CFTR activity in vivo. And thus, the determining the molecular basis by means both NHERF1 and NHERF2 scaffolding with its respective targets could lead to therapeutic targeting in a variety of human diseases. In this dissertation, we solved the co-crystal complexes between both NHERF1 PDZ2 with the C-terminal peptide of CXCR2 in addition to solving the co- crystal complex between NHERF2 PDZ1 with the C-terminal LPA2 peptide. Both structures reveal an expected mode of PDZ binding to their respective substrates with various ligand specific interactions. However, both structures also reveal unexpected findings which may unveil additional therapeutic strategies other than targeting the PDZ substrate binding site.
…
Advisors/Committee Members: Zhe Yang, Jian-Ping Jin.
Subjects/Keywords: protein scaffolding; protein structure; Biogeochemistry; Biophysics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Holcomb, J. (2017). Structural Basis Of Membrane Protein Scaffolding And Signaling In Human Disease. (Doctoral Dissertation). Wayne State University. Retrieved from https://digitalcommons.wayne.edu/oa_dissertations/1809
Chicago Manual of Style (16th Edition):
Holcomb, Joshua. “Structural Basis Of Membrane Protein Scaffolding And Signaling In Human Disease.” 2017. Doctoral Dissertation, Wayne State University. Accessed January 23, 2021.
https://digitalcommons.wayne.edu/oa_dissertations/1809.
MLA Handbook (7th Edition):
Holcomb, Joshua. “Structural Basis Of Membrane Protein Scaffolding And Signaling In Human Disease.” 2017. Web. 23 Jan 2021.
Vancouver:
Holcomb J. Structural Basis Of Membrane Protein Scaffolding And Signaling In Human Disease. [Internet] [Doctoral dissertation]. Wayne State University; 2017. [cited 2021 Jan 23].
Available from: https://digitalcommons.wayne.edu/oa_dissertations/1809.
Council of Science Editors:
Holcomb J. Structural Basis Of Membrane Protein Scaffolding And Signaling In Human Disease. [Doctoral Dissertation]. Wayne State University; 2017. Available from: https://digitalcommons.wayne.edu/oa_dissertations/1809

Massey University
20.
Saraswat, Mayank.
In search of novel folds : protein evolution via non-homologous recombination.
Degree: PhD, Biochemistry, 2014, Massey University
URL: http://hdl.handle.net/10179/5979
► The emergence of proteins from short peptides or subdomains, facilitated by the duplication and fusion of the minigenes encoding them, is believed to have played…
(more)
▼ The emergence of proteins from short peptides or subdomains, facilitated
by the duplication and fusion of the minigenes encoding them, is believed to
have played a role in the origin of life. In this study it was hypothesised that
new domains or basic elements of protein structure, may result from nonhomologous
recombination of the genes coding for smaller subdomains.
The hypothesis was tested by randomly recombining two distantly related
(βα)8-barrel proteins: Escherichia coli phosphoribosylanthranilate isomerase
(PRAI), and β subunit of voltage dependent K+ channels (Kvβ2) from Rattus
norvegicus. The aim was to identify new, folded structures, which may or may
not be (βα)8-barrels. Incremental truncation (ITCHY), a method for
fragmenting and randomly recombining genes, was used to mimic in vivo
non-homologous recombination and to create a library of chimeric variants.
Clones from the library were selected for right reading frame and solubility
(foldability) of the recombined chimeras, using the pSALect selection system.
Out of the six clones identified as soluble by pSALect, only one (P25K86) was
found to be actually soluble. The protein, P25K86, was found to form
oligomers and on treatment with a reducing agent, β-mercaptoethanol the
multimeric state disappeared. The protein has three cysteines and one of the
cysteines (Cys56) was found to mediate in the bond formation, thus giving a
dimeric state. An engineered version of P25K86 that has the Cys56 replaced
by serine was expressed as a monomer and additionally it was found to be
!
iv!
more stable.
As the pSALect folding selection system reported false positives, i.e. only one
of the six chimeras was actually soluble, it was concluded that the in vivo
solubility selection system was leaky. A series of experiments were
conducted so as to improve pSALect that led to the creation of pFoldM – a
more stringent selection system, discussed in chapter 4. Comparing the
newer improved version with the old, two more interesting chimeras were
discovered.
A total of 240,000 non-homologous recombination events were created in
vitro and three soluble chimeras (evolutionary solutions) were found. Data
from circular dichroism spectroscopy (CD) combined with heteronuclear
single quantum coherence (HSQC) spectra suggest that the proteins,
P24K89 and P25K86, are present in a molten globule state. ITCHY, as a
means of mimicking the subdomain assembly model, was applied in vitro.
The discovery of two interesting chimeras (P25K86 and P24K89) using highthroughput
engineering experiments widens the possibilities of exploring
the protein structure space, and perhaps offers close encounters with these
never born proteins that may be trapped in an ensemble of fluctuating (structured and unstructured) states.
Subjects/Keywords: Protein evolution;
Protein structure;
Genetic recombination
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Saraswat, M. (2014). In search of novel folds : protein evolution via non-homologous recombination. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/5979
Chicago Manual of Style (16th Edition):
Saraswat, Mayank. “In search of novel folds : protein evolution via non-homologous recombination.” 2014. Doctoral Dissertation, Massey University. Accessed January 23, 2021.
http://hdl.handle.net/10179/5979.
MLA Handbook (7th Edition):
Saraswat, Mayank. “In search of novel folds : protein evolution via non-homologous recombination.” 2014. Web. 23 Jan 2021.
Vancouver:
Saraswat M. In search of novel folds : protein evolution via non-homologous recombination. [Internet] [Doctoral dissertation]. Massey University; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10179/5979.
Council of Science Editors:
Saraswat M. In search of novel folds : protein evolution via non-homologous recombination. [Doctoral Dissertation]. Massey University; 2014. Available from: http://hdl.handle.net/10179/5979

University of Cambridge
21.
Perron, Umberto.
The Influence of Structural Constraints on Protein Evolution.
Degree: PhD, 2020, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/311064
► Few mathematical models of sequence evolution incorporate parameters describingprotein structure, despite its high conservation, essential functional role and the increasingavailability of structural data. The primary…
(more)
▼ Few mathematical models of sequence evolution incorporate parameters describingprotein structure, despite its high conservation, essential functional role and the increasingavailability of structural data. The primary goal of my PhD project was to create astructurally aware amino acid substitution model in which proteins are represented usingan expanded alphabet that relays both amino acid identity and structural information.Each character in this alphabet specifies an amino acid as well as information aboutthe rotamer configuration of its side chain: the discrete geometric pattern of permittedside chain atomic positions, as defined by the dihedral angles between covalently linkedatoms. I generated a 55-state “Dayhoff-like” substitution model (RAM55) by assigningrotamer states in 79,558 structures (∼50%of all PDBe entries) and identifying substitu-tions between closely related sequences. RAM55’s rotamer state exchange patterns clearlyshow that the evolutionary properties of amino acids depend strongly upon side chain ge-ometry. Exploiting knowledge of these patterns assists in phylogenetic analyses: I showthat RAM55 performs as well as or better than traditional 20-state models on simulatedand empirical data for divergence time estimation, tree inference, side chain configurationprediction and ancestral sequence reconstruction.Further, encoding observed characters in an alignment as ambiguous representations ofcharacters in a larger state-space allows the application of RAM55 to 20-state amino aciddata for which structures are not known. Adding structural information to as few as12.5%of the sequences in an amino acid alignment results in excellent ancestral reconstructionperformance compared to a benchmark that considers the full rotamer state information.This strategy significantly expands the applicability of RAM55 to real-world scenarioswhere structure might only be available for some of the sequences of interest.Thus, not only is rotamer configuration a valuable source of information for phylo-genetic studies, but modelling the concomitant evolution of sequence and structure mayhave important implications for understanding protein folding and function.
Subjects/Keywords: protein; evolution; protein structure; phylogenetics; modelling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Perron, U. (2020). The Influence of Structural Constraints on Protein Evolution. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/311064
Chicago Manual of Style (16th Edition):
Perron, Umberto. “The Influence of Structural Constraints on Protein Evolution.” 2020. Doctoral Dissertation, University of Cambridge. Accessed January 23, 2021.
https://www.repository.cam.ac.uk/handle/1810/311064.
MLA Handbook (7th Edition):
Perron, Umberto. “The Influence of Structural Constraints on Protein Evolution.” 2020. Web. 23 Jan 2021.
Vancouver:
Perron U. The Influence of Structural Constraints on Protein Evolution. [Internet] [Doctoral dissertation]. University of Cambridge; 2020. [cited 2021 Jan 23].
Available from: https://www.repository.cam.ac.uk/handle/1810/311064.
Council of Science Editors:
Perron U. The Influence of Structural Constraints on Protein Evolution. [Doctoral Dissertation]. University of Cambridge; 2020. Available from: https://www.repository.cam.ac.uk/handle/1810/311064

University of Cambridge
22.
Perron, Umberto.
The influence of structural constraints on protein evolution.
Degree: PhD, 2020, University of Cambridge
URL: https://doi.org/10.17863/CAM.58154
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.818131
► Few mathematical models of sequence evolution incorporate parameters describing protein structure, despite its high conservation, essential functional role and the increasing availability of structural data.…
(more)
▼ Few mathematical models of sequence evolution incorporate parameters describing protein structure, despite its high conservation, essential functional role and the increasing availability of structural data. The primary goal of my PhD project was to create a structurally aware amino acid substitution model in which proteins are represented using an expanded alphabet that relays both amino acid identity and structural information. Each character in this alphabet specifies an amino acid as well as information about the rotamer configuration of its side chain: the discrete geometric pattern of permitted side chain atomic positions, as defined by the dihedral angles between covalently linked atoms. I generated a 55-state “Dayhoff-like” substitution model (RAM55) by assigning rotamer states in 79,558 structures (∼50%of all PDBe entries) and identifying substitutions between closely related sequences. RAM55’s rotamer state exchange patterns clearly show that the evolutionary properties of amino acids depend strongly upon side chain geometry. Exploiting knowledge of these patterns assists in phylogenetic analyses: I show that RAM55 performs as well as, or better than, traditional 20-state models on simulated and empirical data for divergence time estimation, tree inference, side chain configuration prediction and ancestral sequence reconstruction. Further, encoding observed characters in an alignment as ambiguous representations of characters in a larger state-space allows the application of RAM55 to 20-state amino acid data for which structures are not known. Adding structural information to as few as 12.5% of the sequences in an amino acid alignment results in excellent ancestral reconstruction performance compared to a benchmark that considers the full rotamer state information. This strategy significantly expands the applicability of RAM55 to real-world scenarios where structure might only be available for some of the sequences of interest. Thus, not only is rotamer configuration a valuable source of information for phylo-genetic studies, but modelling the concomitant evolution of sequence and structure may have important implications for understanding protein folding and function.
Subjects/Keywords: protein; evolution; protein structure; phylogenetics; modelling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Perron, U. (2020). The influence of structural constraints on protein evolution. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.58154 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.818131
Chicago Manual of Style (16th Edition):
Perron, Umberto. “The influence of structural constraints on protein evolution.” 2020. Doctoral Dissertation, University of Cambridge. Accessed January 23, 2021.
https://doi.org/10.17863/CAM.58154 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.818131.
MLA Handbook (7th Edition):
Perron, Umberto. “The influence of structural constraints on protein evolution.” 2020. Web. 23 Jan 2021.
Vancouver:
Perron U. The influence of structural constraints on protein evolution. [Internet] [Doctoral dissertation]. University of Cambridge; 2020. [cited 2021 Jan 23].
Available from: https://doi.org/10.17863/CAM.58154 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.818131.
Council of Science Editors:
Perron U. The influence of structural constraints on protein evolution. [Doctoral Dissertation]. University of Cambridge; 2020. Available from: https://doi.org/10.17863/CAM.58154 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.818131

University of Arizona
23.
Kumirov, Vlad K.
Mechanisms and Consequences of Evolving a New Protein Fold
.
Degree: 2016, University of Arizona
URL: http://hdl.handle.net/10150/605218
► The ability of mutations to change the fold of a protein provides evolutionary pathways to new structures. To study hypothetical pathways for protein fold evolution,…
(more)
▼ The ability of mutations to change the fold of a
protein provides evolutionary pathways to new structures. To study hypothetical pathways for
protein fold evolution, we designed intermediate sequences between Xfaso1 and Pfl6, two homologous Cro proteins that have 40% sequence identity but adopt all–α and α+β folds, respectively. The designed hybrid sequences XPH1 and XPH2 have 70% sequence identity to each other. XPH1 is more similar in sequence to Xfaso1 (86% sequence identity) while XPH2 is more similar to Pfl6 (80% sequence identity). NMR solution ensembles show that XPH1 and XPH2 have structures intermediate between Xfaso1 and Pfl6. Specifically, XPH1 loses α-helices 5 and 6 of Xfaso1 and incorporates a small amount of β-sheet
structure; XPH2 preserves most of the β-sheet of Pfl6 but gains a
structure comparable to helix 6 of Xfaso1. These findings illustrate that the sequence space between two natural
protein folds may encode a range of topologies, which may allow a
protein to change its fold extensively through gradual, multistep mechanisms. Evolving a new fold may have consequences, such as a strained conformation. Here we show that Pfl6 represents an early, strained form of the α+β Cro fold resulting from an ancestral remnant of the all-α Cro proteins retained after the fold switch. This nascent fold can be stabilized through deletion mutations in evolution, which can relieve the strain but may also negatively affect DNA-binding function. Compensatory mutations that increase dimerization appear to offset these effects to maintain function. These findings suggest that new folds can undergo mutational editing through evolution, which may occur in parallel pathways with slightly different outcomes.
Advisors/Committee Members: Cordes, Matthew (advisor), Cordes, Matthew (committeemember), Ghosh, Indraneel (committeemember), Hruby, Victor (committeemember), McEvoy, Megan (committeemember), Montfort, William (committeemember).
Subjects/Keywords: protein fold transformation;
protein nmr spectroscopy;
protein structure;
Chemistry;
protein evolution
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kumirov, V. K. (2016). Mechanisms and Consequences of Evolving a New Protein Fold
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/605218
Chicago Manual of Style (16th Edition):
Kumirov, Vlad K. “Mechanisms and Consequences of Evolving a New Protein Fold
.” 2016. Doctoral Dissertation, University of Arizona. Accessed January 23, 2021.
http://hdl.handle.net/10150/605218.
MLA Handbook (7th Edition):
Kumirov, Vlad K. “Mechanisms and Consequences of Evolving a New Protein Fold
.” 2016. Web. 23 Jan 2021.
Vancouver:
Kumirov VK. Mechanisms and Consequences of Evolving a New Protein Fold
. [Internet] [Doctoral dissertation]. University of Arizona; 2016. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10150/605218.
Council of Science Editors:
Kumirov VK. Mechanisms and Consequences of Evolving a New Protein Fold
. [Doctoral Dissertation]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/605218

Oregon State University
24.
Berkholz, Donald S.
Modeling protein structure at atomic resolution.
Degree: PhD, Biochemistry and Biophysics, 2009, Oregon State University
URL: http://hdl.handle.net/1957/12475
► This thesis includes three studies involving different aspects of modeling protein structure. The first study illustrates the levels of insight available from atomic-resolution protein structures.…
(more)
▼ This thesis includes three studies involving different aspects of modeling
protein structure. The first study illustrates the levels of insight available from atomic-resolution
protein structures. The second study derives general trends of
protein geometry from atomic-resolution structures and shows their implications for modeling. The third study creates a model of a
protein and uses it to derive new biological insights.
In the first study, a series of structures were analyzed from human glutathione reductase, a biomedically relevant enzyme. Newly accessible at atomic resolution is structural evidence showing the catalytic importance of active-site compression, which additionally causes distortions from standard geometry that further enhance catalytic power. Another aspect of geometry visible at atomic resolution is the remarkably ideal positioning of atoms for catalysis. The stereoelectronic control displayed by compression and geometric preorganization provides insight into the origins of catalytic power.
The second study builds upon quantum-mechanics calculations and empirical analyses of
protein structure from the 1990s that showed the concept of a single ideal value for backbone geometry was wrong. Here, a nonredundant set of
protein structures at atomic resolution is probed to better define the dependence of backbone geometry upon the conformation of the backbone torsion angles Φ and Ψ. The set was taken from the
Protein Geometry Database created here (http://pgd.science.oregonstate.edu/). The trends seen make structural sense and lay the groundwork for a paradigm shift in the concept of ideal geometry. A conformation-dependent library accounting for these trends has the potential to improve modeling accuracy.
In the third study, a model of the tumor-suppressor merlin is created and used to gain new understanding of merlin's function. Merlin is the only known cytoskeletal tumor suppressor, and loss of functional merlin results in neurofibromatosis 2, characterized by nervous-system tumors, cataracts, and skin tumors. Clear errors were evident in available automatically created models, driving the need for a reliable
structure. Merlin and its homologs have distinct functions, so the differences between them were probed, suggesting critical functional clusters. A new technique developed here for discovering gains and losses of function should be generally applicable to any two
protein subfamilies with distinct functions.
Advisors/Committee Members: Karplus, P. Andrew (advisor), Beckman, Joseph S (committee member).
Subjects/Keywords: protein structure; Proteins – Structure – Mathematical models
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Berkholz, D. S. (2009). Modeling protein structure at atomic resolution. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/12475
Chicago Manual of Style (16th Edition):
Berkholz, Donald S. “Modeling protein structure at atomic resolution.” 2009. Doctoral Dissertation, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/12475.
MLA Handbook (7th Edition):
Berkholz, Donald S. “Modeling protein structure at atomic resolution.” 2009. Web. 23 Jan 2021.
Vancouver:
Berkholz DS. Modeling protein structure at atomic resolution. [Internet] [Doctoral dissertation]. Oregon State University; 2009. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/12475.
Council of Science Editors:
Berkholz DS. Modeling protein structure at atomic resolution. [Doctoral Dissertation]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/12475
25.
Veyron, Simon.
Structure et fonction des toxines bactériennes à domaine FIC : Structural and Biochemical studies of bacterial FIC toxins.
Degree: Docteur es, Biochimie et biologie structurale, 2017, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2017SACLS452
► Les protéines à domaine FIC (Filamentation induced by cAMP) sont très répandues chez les bactéries où elles catalysent l’ajout d’une modification post-traductionnelle contenant un phosphate…
(more)
▼ Les protéines à domaine FIC (Filamentation induced by cAMP) sont très répandues chez les bactéries où elles catalysent l’ajout d’une modification post-traductionnelle contenant un phosphate à une protéine cible, en utilisant différents co-substrats comme l’ATP. Certaines de ces protéines sont des toxines sécrétées par des pathogènes humains, mais la fonction de la plupart d’entre elles reste mystérieuse. Plus d’une dizaine de structures de protéines FIC ont été déterminées récemment, qui ont permis d’élucider leur mécanisme catalytique. L’une des sous-familles de protéines FIC possède un glutamate dans leur site catalytique, dont il a été proposé qu’il aurait une fonction auto-inhibitrice pour la fixation de l’ATP. Durant ma thèse, j’ai étudié la
structure et les mécanismes de régulation de deux familles de protéines FIC : les protéines FIC à glutamate inhibiteur, et la toxine AnkX de la bactérie pathogène Legionella pneumophila.La première étude s’est intéressée à la protéine FIC de la bactérie pathogène Enterococcus faecalis (EfFIC), qui fait partie de la sous-famille des protéines FIC possédant un glutamate inhibiteur. J’ai résolu plusieurs structures cristallographique d’EfFIC, qui ont permis de caractériser son site catalytique et comment elle fixe l’AMP et l’ADP. En utilisant une propriété fréquemment observée d’auto-AMPylation (modification par l’AMP), j’ai montré au moyen d’ATP radioactif qu’EfFIC possède une activité basale d’auto-AMPylation, et j’ai identifié une nouvelle activité de dé-AMPylation. En m’inspirant des métaux observés dans mes structures cristallographiques, j’ai montré que l’alternance entre les activités d’AMPylation et de de-AMPylation dépend de la nature du métal fixé dans le site actif et de la présence du glutamate. Ce glutamate régulateur est également présent chez une protéine humaine, HYPE, qui possède une double activité d’AMPylation et dé-AMPylation d’ une chaperone du réticulum endoplasmique. Par un test de fluorescence, j’ai enfin montré que l’activité de HYPE était elle aussi régulée par les métaux comme celle de EfFIC. Ces résultats suggèrent un nouveau modèle de régulation partagé par des protéines FIC de la bactérie à l’homme.La seconde étude a porté sur la toxine AnkX de Legionella pneumophila, qui modifie les petites protéines G de la famille de Rab Rab1 et Rab35 (régulatrices du trafic cellulaire) par une molécule de phosphocholine (PC). En utilisant des liposomes de composition contrôlée, j’ai montré qu’AnkX interagit avec les membranes, et j’ai identifié par mutagenèse son domaine d’interaction avec les membranes. Au moyen de petites GTPases Rab ancrées artificiellement à la surface de liposomes par une queue 6his remplaçant le lipide naturel, j’ai montré que l’activité d’AnkX est stimulée par la présence de membranes. Des résultats préliminaires suggérent que Rab35 est un meilleur substrat que Rab1a, ce qui pourrait renseigner sur la fonction et le compartiment cellulaire où se trouve la toxine. J’ai ensuite mené une étude structurale d’AnkX par diffusion des rayons X…
Advisors/Committee Members: Cherfils, Jacqueline (thesis director).
Subjects/Keywords: Structure; Toxine; Fonction; Structure; Pathogen; Protein
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Veyron, S. (2017). Structure et fonction des toxines bactériennes à domaine FIC : Structural and Biochemical studies of bacterial FIC toxins. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2017SACLS452
Chicago Manual of Style (16th Edition):
Veyron, Simon. “Structure et fonction des toxines bactériennes à domaine FIC : Structural and Biochemical studies of bacterial FIC toxins.” 2017. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 23, 2021.
http://www.theses.fr/2017SACLS452.
MLA Handbook (7th Edition):
Veyron, Simon. “Structure et fonction des toxines bactériennes à domaine FIC : Structural and Biochemical studies of bacterial FIC toxins.” 2017. Web. 23 Jan 2021.
Vancouver:
Veyron S. Structure et fonction des toxines bactériennes à domaine FIC : Structural and Biochemical studies of bacterial FIC toxins. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2017. [cited 2021 Jan 23].
Available from: http://www.theses.fr/2017SACLS452.
Council of Science Editors:
Veyron S. Structure et fonction des toxines bactériennes à domaine FIC : Structural and Biochemical studies of bacterial FIC toxins. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2017. Available from: http://www.theses.fr/2017SACLS452

NSYSU
26.
Chen, Chun-jen.
A New Fitness Function for Evaluating the Quality of Predicted Protein Structures.
Degree: Master, Computer Science and Engineering, 2010, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0902110-103900
► For understanding the function of a protein, the protein structure plays an important role. The prediction of protein structure from its primary sequence has significant…
(more)
▼ For understanding the function of a
protein, the
protein structure plays an important role. The prediction of
protein structure from its primary sequence has significant assistance in bioinformatics. Generally, the real
protein structures can be reconstructed by some costly techniques, but predicting the
protein structures helps us guess the functional expression of a
protein in advance. In this thesis, we develop three terms as the materials of the fitness function that can be successfully used in
protein backbone
structure prediction. In the result of this thesis, it shows that over 80% of good values calculated from our fitness function, which are generated by the genetic programming, are better than the average in the CASP8.
Advisors/Committee Members: Kuo-Tsung Tseng (chair), Chang-Biau Yang (committee member), Shih-Chung Chen (chair), Chung-Lung Cho (chair), Jyh-Jian Sheu (chair).
Subjects/Keywords: prediction; tertiary structure; protein
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, C. (2010). A New Fitness Function for Evaluating the Quality of Predicted Protein Structures. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0902110-103900
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Chun-jen. “A New Fitness Function for Evaluating the Quality of Predicted Protein Structures.” 2010. Thesis, NSYSU. Accessed January 23, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0902110-103900.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Chun-jen. “A New Fitness Function for Evaluating the Quality of Predicted Protein Structures.” 2010. Web. 23 Jan 2021.
Vancouver:
Chen C. A New Fitness Function for Evaluating the Quality of Predicted Protein Structures. [Internet] [Thesis]. NSYSU; 2010. [cited 2021 Jan 23].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0902110-103900.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen C. A New Fitness Function for Evaluating the Quality of Predicted Protein Structures. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0902110-103900
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta
27.
Lee, Brian L.
An NMR-based approach to the structural and functional
investigation of the Na+/H+ exchanger NHE1.
Degree: PhD, Department of Biochemistry, 2013, University of Alberta
URL: https://era.library.ualberta.ca/files/h415pb712
► The Na+/H+ exchanger isoform 1 (NHE1) is the predominant isoform in mammalian cells, and regulates intracellular pH and ion concentrations. NHE1 also interacts with numerous…
(more)
▼ The Na+/H+ exchanger isoform 1 (NHE1) is the
predominant isoform in mammalian cells, and regulates intracellular
pH and ion concentrations. NHE1 also interacts with numerous
proteins and signalling pathways. Consequently, it has been found
to influence cell volume, growth, differentiation, and motility,
and has roles in heart disease and cancer. While a wealth of
biochemical and physiological data is available on NHE1, little is
known about its structure or mechanism of function. In this thesis,
a "divide and conquer" approach was used to study the structure and
function of NHE1. The structures of individual transmembrane (TM)
segments were determined using nuclear magnetic resonance (NMR)
spectroscopy, and the function of the TM segments in the full
protein were investigated using site-directed mutagenesis in
cultured cells. We first examined the structures and functions of
the second (EL 2) and fourth (EL 4) extracellular loops of NHE1.
Both loops contained functionally important residues, however, EL 2
was found to be structured by NMR while EL 4 was unstructured.
Next, we investigated two critical TM segments in NHE1, TM VI and
TM XI, as well as TM IV of sod2, a yeast Na+/H+ exchanger. These TM
segments were found to have unusual structures consisting of a N-
and C-terminal alpha-helix, with an extended segment in between,
and the structures correlated well with the functional data. We
also looked at larger regions of NHE1 using NMR to examine the
TM – TM interactions in the protein, starting with a structure of a
two-TM segment of NHE1, TM VI – VII. We also present preliminary NMR
experiments on two three-TM segments, TM V – VII and TM X – XII, as
well as full-length Escherichia coli NhaA. Overall, the "divide and
conquer" approach has allowed us to successfully examine the
structures and functions of single-TM segments of NHE1.
Furthermore, studies on multi-TM segments and NhaA suggest that we
may be able to assemble the structure of NHE1 from its segments or
even study the complete protein by NMR spectroscopy.
Subjects/Keywords: NHE1; membrane protein; structure; NMR
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lee, B. L. (2013). An NMR-based approach to the structural and functional
investigation of the Na+/H+ exchanger NHE1. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/h415pb712
Chicago Manual of Style (16th Edition):
Lee, Brian L. “An NMR-based approach to the structural and functional
investigation of the Na+/H+ exchanger NHE1.” 2013. Doctoral Dissertation, University of Alberta. Accessed January 23, 2021.
https://era.library.ualberta.ca/files/h415pb712.
MLA Handbook (7th Edition):
Lee, Brian L. “An NMR-based approach to the structural and functional
investigation of the Na+/H+ exchanger NHE1.” 2013. Web. 23 Jan 2021.
Vancouver:
Lee BL. An NMR-based approach to the structural and functional
investigation of the Na+/H+ exchanger NHE1. [Internet] [Doctoral dissertation]. University of Alberta; 2013. [cited 2021 Jan 23].
Available from: https://era.library.ualberta.ca/files/h415pb712.
Council of Science Editors:
Lee BL. An NMR-based approach to the structural and functional
investigation of the Na+/H+ exchanger NHE1. [Doctoral Dissertation]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/h415pb712

University of Waterloo
28.
Holtby, Daniel James.
Loop Modeling in Proteins Using a Database Approach with Multi-Dimensional Scaling.
Degree: 2013, University of Waterloo
URL: http://hdl.handle.net/10012/7935
► Modeling loops is an often necessary step in protein structure and function determination, even with experimental X-ray and NMR data. It is well known to…
(more)
▼ Modeling loops is an often necessary step in protein structure and function determination, even with experimental X-ray and NMR data. It is well known to be difficult. Database techniques have the advantage of producing a higher proportion of predictions with sub-angstrom accuracy when compared with ab initio techniques, but the disadvantage of often being able to produce usable results as they depend entirely on the loop already being represented within the database. My contribution is the LoopWeaver protocol, a database method that uses multidimensional scaling to rapidly achieve better clash-free, low energy placement of loops obtained from a database of protein structures. This maintains the above- mentioned advantage while avoiding the disadvantage by permitting the use of lower quality matches that would not otherwise fit.
Test results show that this method achieves significantly better results than all other methods, including Modeler, Loopy, SuperLooper, and Rapper before refinement.
With refinement, the results (LoopWeaver and Loopy combined) are better than ROSETTA's, with 0.53Å RMSD on average for 206 loops of length 6, 0.75Å local RMSD for 168 loops of length 7,
0.93Å RMSD for 117 loops of length 8, and 1.13Å RMSD loops of length 9, while ROSETTA scores 0.66Å , 0.93Å , 1.23Å , 1.56Å , respectively, at the same average time limit
(3 hours on a 2.2 GHz Opteron). When ROSETTA is allowed to run for over a week against LoopWeaver's and Loopy's combined 3 hours, it approaches, but does not surpass, this accuracy.
Subjects/Keywords: loop modeling; protein structure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Holtby, D. J. (2013). Loop Modeling in Proteins Using a Database Approach with Multi-Dimensional Scaling. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Holtby, Daniel James. “Loop Modeling in Proteins Using a Database Approach with Multi-Dimensional Scaling.” 2013. Thesis, University of Waterloo. Accessed January 23, 2021.
http://hdl.handle.net/10012/7935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Holtby, Daniel James. “Loop Modeling in Proteins Using a Database Approach with Multi-Dimensional Scaling.” 2013. Web. 23 Jan 2021.
Vancouver:
Holtby DJ. Loop Modeling in Proteins Using a Database Approach with Multi-Dimensional Scaling. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10012/7935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Holtby DJ. Loop Modeling in Proteins Using a Database Approach with Multi-Dimensional Scaling. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto
29.
Taylor, Matthew Wade.
Expression and Structural Studies of Nucleic Acid Binding Cytidine Deaminases.
Degree: 2016, University of Toronto
URL: http://hdl.handle.net/1807/76196
► Activation Induced Deaminase (AID) and the APOBEC3 proteins are nucleic acid cytidine deaminases (CDs) which play critical roles the immune system. These proteins bind both…
(more)
▼ Activation Induced Deaminase (AID) and the APOBEC3 proteins are nucleic acid cytidine deaminases (CDs) which play critical roles the immune system. These proteins bind both single-stranded -DNA (ssDNA) and -RNA (ssRNA) and catalyze deamination of ssDNA cytidines, the mechanisms mediating said binding events are poorly understood and their study has proven troublesome due to the difficulty of working with these proteins. Due to a lack of success in using AID in biochemical and structural analyses we turned to another CD, the Brassica oleacra var. capitate cytidine deaminase putative tRNA CD (BOCD). BOCD was selected due to predicted structural homology to other nucleic acid binding CDs and its immune functioning. I have determined the structure of BOCD crystallographically and analyzed it against other CD structures. BOCD will be useful for studying nucleic acid interactions of CDs and may be useful for engineering of more soluble nucleic acid CDs.
M.Sc.
Advisors/Committee Members: Lee, Jeffrey E, Laboratory Medicine and Pathobiology.
Subjects/Keywords: Crystallography; Deaminase; Protein Structure; 0487
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Taylor, M. W. (2016). Expression and Structural Studies of Nucleic Acid Binding Cytidine Deaminases. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/76196
Chicago Manual of Style (16th Edition):
Taylor, Matthew Wade. “Expression and Structural Studies of Nucleic Acid Binding Cytidine Deaminases.” 2016. Masters Thesis, University of Toronto. Accessed January 23, 2021.
http://hdl.handle.net/1807/76196.
MLA Handbook (7th Edition):
Taylor, Matthew Wade. “Expression and Structural Studies of Nucleic Acid Binding Cytidine Deaminases.” 2016. Web. 23 Jan 2021.
Vancouver:
Taylor MW. Expression and Structural Studies of Nucleic Acid Binding Cytidine Deaminases. [Internet] [Masters thesis]. University of Toronto; 2016. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1807/76196.
Council of Science Editors:
Taylor MW. Expression and Structural Studies of Nucleic Acid Binding Cytidine Deaminases. [Masters Thesis]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/76196

Hong Kong University of Science and Technology
30.
Li, Youjun.
Complex structure of crumbs cytoplasmic tail with moesin FERM domain reveals a novel FERM-binding mode.
Degree: 2012, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-73408
;
https://doi.org/10.14711/thesis-b1190245
;
http://repository.ust.hk/ir/bitstream/1783.1-73408/1/th_redirect.html
► The apical transmembrane protein Crumbs is a determinant of apical-basal cell polarity. The short cytoplasmic domain of Crumbs, containing two highly conserved motifs, a PSD95/Discs-large/ZO1…
(more)
▼ The apical transmembrane protein Crumbs is a determinant of apical-basal cell polarity. The short cytoplasmic domain of Crumbs, containing two highly conserved motifs, a PSD95/Discs-large/ZO1 (PDZ) binding motif (PBM) and a 4.1/ezrin/radixin/moesin (FERM)-binding motif (FBM), plays an essential role for Crumbs’ function in definition of the apical boundary during development. It has been widely accepted that Crumbs forms a critical polarity complex with a membrane-associated guanylate kinase (MAGUK) family protein Pals1 and a PDZ-containing protein PATJ via the PBM/Pals1 interaction. However, the roles of FBM in Crumbs are poorly understood. Recently, Médina et al reported that Crumbs interacts with a FERM domain-containing protein Moesin via its FBM. As Moesin connects to cytoskeleton, the Crumbs/Moesin interaction provides a potential mechanism to stabilization of the apical domain. Here, we biochemically and structurally characterized the interaction between the cytoplasmic domain of Crumbs and the FERM domain of Moesin. We confirmed that the FBM is required for the Crumbs/Moesin interaction. Surprisingly, we further identified that the PBM also contributes to the interaction. We determined the crystal structure of the Crumbs/Moesin complex at 1.5 Å resolution. Consistent with our biochemical data, the complex structure shows that both the FBM and PBM are involved in the binding of Crumbs to the FERM domain of Moesin. Together, our findings indicate that the two motifs of Crumbs not only act as binding sites but also regulate the interactions between Crumbs and their binding partners. This finding provides a direct linkage between the establishment of the apical-basal polarity and the stabilization of the apical domain together. Additionally, the PBM in the Crumbs/Moesin complex occupies the InsP3 binding site in the Moesin FERM domain, suggesting that Crumbs may compete the binding of Moesin with plasma membrane.
Subjects/Keywords: Membrane proteins
; Structure
; Protein binding
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, Y. (2012). Complex structure of crumbs cytoplasmic tail with moesin FERM domain reveals a novel FERM-binding mode. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-73408 ; https://doi.org/10.14711/thesis-b1190245 ; http://repository.ust.hk/ir/bitstream/1783.1-73408/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Youjun. “Complex structure of crumbs cytoplasmic tail with moesin FERM domain reveals a novel FERM-binding mode.” 2012. Thesis, Hong Kong University of Science and Technology. Accessed January 23, 2021.
http://repository.ust.hk/ir/Record/1783.1-73408 ; https://doi.org/10.14711/thesis-b1190245 ; http://repository.ust.hk/ir/bitstream/1783.1-73408/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Youjun. “Complex structure of crumbs cytoplasmic tail with moesin FERM domain reveals a novel FERM-binding mode.” 2012. Web. 23 Jan 2021.
Vancouver:
Li Y. Complex structure of crumbs cytoplasmic tail with moesin FERM domain reveals a novel FERM-binding mode. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2012. [cited 2021 Jan 23].
Available from: http://repository.ust.hk/ir/Record/1783.1-73408 ; https://doi.org/10.14711/thesis-b1190245 ; http://repository.ust.hk/ir/bitstream/1783.1-73408/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li Y. Complex structure of crumbs cytoplasmic tail with moesin FERM domain reveals a novel FERM-binding mode. [Thesis]. Hong Kong University of Science and Technology; 2012. Available from: http://repository.ust.hk/ir/Record/1783.1-73408 ; https://doi.org/10.14711/thesis-b1190245 ; http://repository.ust.hk/ir/bitstream/1783.1-73408/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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