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Book
Function and Flexibility: Friend or Foe?
Authors: ---
Year: 2016 Publisher: Frontiers Media SA

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Abstract

Louis Sullivan (1856 - 1924) revolutionized architecture by designing the first skyscraper and he became famous by proclaiming that “form follows function”. When x-ray crystallographers visualized the structures of proteins for the first time, the structural biology field embraced the view that “function follows form” as the 3D-architecture of proteins could unveil various aspects of their function. Despite the original “1 gene - 1 protein structure - 1 function” relationship, nowadays a far more complicated picture emerges where the flexibility and dynamics of a protein can play a central role in a multitude of functions. The ultimate form(s) that a protein adopt when interacting with (a) partner molecule(s) are the most biologically relevant and in this context Sullivan’s quote is still appropriate: the conformation that the protein adopts follows from the function of that protein. Despite the fact that many well-characterized proteins have a well-folded structure, there is a growing interest in the conformational flexibility within proteins. This flexibility is also a balanced phenomenon: excess of flexibility can be detrimental for protein behaviour, as well as the lack thereof. Notwithstanding its importance, studying intrinsically disordered protein regions or conformational rearrangements can be a very challenging. Therefore, flexibility can be perceived as a friend or a foe, depending on the context. This e-book showcases the impact of the study of protein flexibility on the structural biology field and presents protein flexibility in the context of disease as well as its benign aspects. As detailed knowledge of the structural aspects of polypeptides remains essential to comprehend protein function, one of the future challenges for structural biology also lies with large macromolecular protein complexes. Also there the dynamics and flexibility are essential for proper functioning and molecular movement, which is an important aspect of living matter. This challenge stimulated the development of advanced techniques to study protein flexibility and the use of those techniques to address fundamental biological and biomedical problems. Those innovations should help us to unravel the intimate link between protein function and flexibility and explore new horizons.


Book
Advances in protein folding research
Author:
ISBN: 1634836138 9781634836135 163483593X 9781634835930 Year: 2016 Publisher: New York


Book
Intrinsically disordered proteins : dynamics, binding, and function
Author:
ISBN: 0128167327 0128163488 9780128167328 9780128163481 Year: 2019 Publisher: London, England : Academic Press,

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"Intrinsically Disordered Proteins: Dynamics, Binding, and Function thoroughly examines and ties together the fundamental biochemical functions of intrinsically disordered proteins (IDPs) and intrinsically disordered regions (IDRs), including signaling, binding, and regulation, with the methodology for study and the associated pathways for drug design and therapeutic intervention. The role of new mechanistic, computational, and experimental approaches in IDP study are explored in depth, with methods for the characterization of IDP dynamics; models, simulations, and mechanisms of IDP and IDR binding; and biological and medical implications of IDP dynamics prominently featured. Written and edited by leading scientists in the field, this book explores groundbreaking areas such as ensemble descriptions of IDPs and IDRs, single-molecule studies of IDPs and IDRs, IDPs and IDRs in membraneless organelles, and molecular mechanisms of fibrillation of IDPs. Intrinsically Disordered Proteins provides students and researchers in biochemistry, molecular biology, and applied microbiology with a comprehensive and updated discussion of the complex dynamics of IDPs and IDRs."--


Book
In-Cell NMR Spectroscopy: Biomolecular Structure and Function
Authors: ---
ISBN: 3039282557 3039282549 Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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This Special Issue examines state-of-the-art in-cell NMR spectroscopy as it relates to biological systems of increasing complexity. The compendia of research and recent innovations from prominent laboratories in the field of solid state and solution in-cell NMR spectroscopy, metabolomics and technology development are presented. The work establishes in-cell NMR spectroscopy as the premier method for determining the structures and interaction capabilities of biological molecules at high resolution within the delicately intricate interior of living cells, and the means of utilizing cells as living laboratories to directly assess the effects of exogenous and endogenous stimuli on cell physiology.]


Book
Functionally Relevant Macromolecular Interactions of Disordered Proteins
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Disordered proteins are relatively recent newcomers in protein science. They were first described in detail by Wright and Dyson, in their J. Mol. Biol. paper in 1999. First, it was generally thought for more than a decade that disordered proteins or disordered parts of proteins have different amino acid compositions than folded proteins, and various prediction methods were developed based on this principle. These methods were suitable for distinguishing between the disordered (unstructured) and structured proteins known at that time. In addition, they could predict the site where a folded protein binds to the disordered part of a protein, shaping the latter into a well-defined 3D structure. Recently, however, evidence has emerged for a new type of disordered protein family whose members can undergo coupled folding and binding without the involvement of any folded proteins. Instead, they interact with each other, stabilizing their structure via “mutual synergistic folding” and, surprisingly, they exhibit the same residue composition as the folded protein. Increasingly more examples have been found where disordered proteins interact with non-protein macromolecules, adding to the already large variety of protein–protein interactions. There is also a very new phenomenon when proteins are involved in phase separation, which can represent a weak but functionally important macromolecular interaction. These phenomena are presented and discussed in the chapters of this book.

Keywords

intrinsically disordered proteins --- epiproteome --- disordered protein platform --- molecular recognition feature --- post-translational modifications --- physiological homeostasis --- stress response --- RIN4 --- p53 --- molecular machines --- intrinsically disordered protein --- membrane-less organelle --- neurodegenerative disease --- p300 HAT acetylation --- post-translational modification --- protein aggregation --- Tau fibrillation --- intrinsically disorder proteins --- disorder-to-order regions --- protein–RNA interactions --- unstructured proteins --- conformational plasticity --- disordered protein --- folding --- ribosomal protein --- spectroscopy --- protein stability --- temperature response --- protein thermostability --- salt bridges --- meta strategy --- dual threshold --- significance voting --- decision tree based artificial neural network --- protein intrinsic disorder --- intrinsic disorder --- intrinsic disorder prediction --- intrinsically disordered region --- protein conformation --- transcriptome --- RNA sequencing --- Microarray --- differentially regulated genes --- gene ontology analysis --- functional analysis --- intrinsically disordered --- structural disorder --- correlated mutations --- co-evolution --- evolutionary couplings --- residue co-variation --- interaction surface --- residue contact network --- dehydron --- homodimer --- hydrogen bond --- inter-subunit interaction --- ion pair --- mutual synergistic folding --- solvent-accessible surface area --- stabilization center --- MLL proteins --- MLL4 --- lncRNA --- HOTAIR --- MEG3 --- leukemia --- histone lysine methyltransferase --- RNA binding --- protein --- hydration --- wide-line 1H NMR --- secretion --- immune --- extracellular --- protein-protein interaction --- structural domain --- evolution --- transcription factors --- DNA-protein interactions --- Sox2 sequential DNA loading --- smFRET --- DNA conformational landscape --- sequential DNA bending --- transcription factor dosage --- oligomer --- N-terminal prion protein --- copper binding --- prion disease mutations --- Nuclear pore complex --- FG-Nups --- phosphorylation --- coarse-grained --- CABS model --- MC simulations --- statistical force fields --- protein structure --- intrinsically disordered proteins (IDPs) --- neurodegenerative diseases --- aggregation --- drugs --- drug discovery --- plant virus --- eIF4E --- VPg --- potyvirus --- molten globule --- fluorescence anisotropy --- protein hydrodynamics


Periodical
Folding & design.
ISSN: 18785808 Year: 1996 Publisher: London ; San Francisco, CA : Current Biology

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Keywords

Protein folding --- RNA --- Biomolecules --- Protein Engineering. --- Protein Folding. --- Proteins --- Protéines --- ARN --- Biomolécules --- Conformation --- Design --- analysis. --- Repliement --- Protein Folding, Globular --- Folding, Globular Protein --- Folding, Protein --- Foldings, Globular Protein --- Foldings, Protein --- Globular Protein Folding --- Globular Protein Foldings --- Protein Foldings --- Protein Foldings, Globular --- Genetic Engineering, Protein --- Proteins, Genetic Engineering --- Genetic Engineering of Proteins --- Engineering, Protein --- Engineering, Protein Genetic --- Protein Genetic Engineering --- Biological molecules --- Ribonucleic acid --- Ribose nucleic acid --- Folding of proteins --- Folding --- Protein Engineering --- Protein Folding --- analysis --- Gene Products, Protein --- Gene Proteins --- Protein Gene Products --- Proteins, Gene --- Molecular Mechanisms of Pharmacological Action --- Proteostasis --- Protein Multimerization --- Intrinsically Disordered Proteins --- Genetic Engineering --- Directed Molecular Evolution --- DNA Shuffling --- Molecular Farming --- Molecules --- Molecular biology --- Nucleic acids --- Ribose --- Protéines --- Biomolécules --- Protein folding. --- Protein --- Protein engineering. --- Technologie des protéines. --- Protein design --- Biochemical engineering --- Genetic engineering --- Conformació de proteïnes. --- Enginyeria de proteïnes. --- Revistes electròniques. --- Enginyeria de proteïnes --- Proteïnes --- Biomolècules --- Anàlisi --- Disseny --- Conformació


Book
Intrinsically Disordered Proteins and Chronic Diseases
Authors: ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This book is an embodiment of a series of articles that were published as part of a Special Issue of Biomolecules. It is dedicated to exploring the role of intrinsically disordered proteins (IDPs) in various chronic diseases. The main goal of the articles is to describe recent progress in elucidating the mechanisms by which IDPs cause various human diseases, such as cancer, cardiovascular disease, amyloidosis, neurodegenerative diseases, diabetes, and genetic diseases, to name a few. Contributed by leading investigators in the field, this compendium serves as a valuable resource for researchers, clinicians as well as postdoctoral fellows and graduate students

Keywords

IDP --- fuzzy interactions --- protein complementation assays --- split-GFP reassembly --- kinetics --- membraneless organelles --- optical tweezer --- liquid–liquid phase separation --- protein diffusion --- depletion interaction --- entropic force --- low-complexity sequences --- intrinsically disordered proteins --- PAGE4 --- conformational plasticity --- order–disorder transition --- phosphorylation --- intrinsic disordered protein --- extremely fuzzy complex --- protein interaction --- binding mechanism --- tumor protein p53 --- mouse double minute 2 --- mouse double minute 4 --- Kinase-inducible domain interacting domain --- phosphomimetics --- nuclear magnetic resonance --- transient secondary structure --- COR15A --- Late embryogenesis abundant --- Trifluoroethanol --- Nuclear magnetic resonance --- intrinsically disordered regions --- functional segments --- disease-related proteins --- protein-protein interaction --- subcellular location --- glucocorticoid receptor --- intrinsically disordered --- transactivation activity --- gene regulation --- coactivators --- microtubule associated protein --- tau --- intrinsically disordered protein --- dynamic configuration --- free energy landscape --- microtubules --- electrostatics --- diffusion --- protein structure prediction --- molecular modelling --- molecular dynamics --- tau–microtubule association --- conformational ensemble --- replica exchange molecular dynamics --- drug design --- n/a --- liquid-liquid phase separation --- order-disorder transition --- tau-microtubule association


Book
The Amazing World of IDPs in Human Diseases
Authors: --- ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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It is now clearly established that some proteins or protein regions are devoid of any stable secondary and/or tertiary structure under physiological conditions, but still possess fundamental biological functions. These intrinsically disordered proteins (IDPs) or regions (IDRs) have peculiar features due to their plasticity such as the capacity to bind their biological targets with high specificity and low affinity, and the possibility of interaction with numerous partners. A correlation between intrinsic disorder and various human diseases such as cancer, diabetes, amyloidoses and neurodegenerative diseases is now evident, highlighting the great importance of the topic. In this volume, we have collected recent high-quality research about IDPs and human diseases. We have selected nine papers which deal with a wide range of topics, from neurodegenerative disease to cancer, from IDR-mediated interactions to bioinformatics tools, all related to IDP peculiar features. Recent advances in the IDPs/IDRs issue are here presented, contributing to the progress of knowledge of the intrinsic disorder field in human disease.


Book
The Fuzziness in Molecular, Supramolecular, and Systems Chemistry
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Fuzzy Logic is a good model for the human ability to compute words. It is based on the theory of fuzzy set. A fuzzy set is different from a classical set because it breaks the Law of the Excluded Middle. In fact, an item may belong to a fuzzy set and its complement at the same time and with the same or different degree of membership. The degree of membership of an item in a fuzzy set can be any real number included between 0 and 1. This property enables us to deal with all those statements of which truths are a matter of degree. Fuzzy logic plays a relevant role in the field of Artificial Intelligence because it enables decision-making in complex situations, where there are many intertwined variables involved. Traditionally, fuzzy logic is implemented through software on a computer or, even better, through analog electronic circuits. Recently, the idea of using molecules and chemical reactions to process fuzzy logic has been promoted. In fact, the molecular word is fuzzy in its essence. The overlapping of quantum states, on the one hand, and the conformational heterogeneity of large molecules, on the other, enable context-specific functions to emerge in response to changing environmental conditions. Moreover, analog input–output relationships, involving not only electrical but also other physical and chemical variables can be exploited to build fuzzy logic systems. The development of “fuzzy chemical systems” is tracing a new path in the field of artificial intelligence. This new path shows that artificially intelligent systems can be implemented not only through software and electronic circuits but also through solutions of properly chosen chemical compounds. The design of chemical artificial intelligent systems and chemical robots promises to have a significant impact on science, medicine, economy, security, and wellbeing. Therefore, it is my great pleasure to announce a Special Issue of Molecules entitled “The Fuzziness in Molecular, Supramolecular, and Systems Chemistry.” All researchers who experience the Fuzziness of the molecular world or use Fuzzy logic to understand Chemical Complex Systems will be interested in this book.

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