The Molecular Chaperones Interaction Networks In Protein Folding And Degradation

Molecular chaperones are a fundamental group of proteins that have been identified only relatively recently. They are key components of a protein quality machinery in the cell which insures that the folding process of any newly-synthesized polypeptide chain results in the formation of a properly folded protein and that the folded protein is maintained in an active conformation throughout its functional lifetime. Molecular chaperones have been shown to play essential roles in cell viability under both normal and stress conditions. Chaperones can also assist in the unfolding and degradation of misfolded proteins and in disaggregating preformed protein aggregates. Chaperones are also involved in other cellular functions including protein translocation across membranes, vesicle fusion events, and protein secretion. In recent years, tremendous advances have been made in our understanding of the biology, biochemistry, and biophysics of function of molecular chaperones. In addition, recent technical developments in the fields of proteomics and genomics allowed us to obtain a global view of chaperone interaction networks. Finally, there is now a growing interest in the role of molecular chaperones in diseases. This book will provide a comprehensive analysis of the structure and function of the diverse systems of molecular chaperones and their role in cell stress responses and in diseases from a global network perspective. ​

Co-chaperones are important mediators of the outcome of chaperone assisted protein homeostasis, which is a dynamic balance between the integrated processes of protein folding, degradation and translocation. The Networking of Chaperones by Co-chaperones describes how the function of the major molecular chaperones is regulated by a cohort of diverse non-client proteins, known as co-chaperones. The second edition includes the current status of the field and descriptions of a number of novel co-chaperones that have been recently identified. This new edition has a strong focus on the role of co-chaperones in human disease and as putative drug targets. The book will be a resource for both newcomers and established researchers in the field of cell stress and chaperones, as well as those interested in cross-cutting disciplines such as cellular networks and systems biology.

Co-chaperones are important mediators of the outcome of chaperone assisted protein homeostasis, which is the dynamic integration of the processes of protein folding, degradation and translocation to ensure that cellular function is finely tuned in space and time. This third edition of the book The Networking of Chaperones by Co-chaperones describes how the function of the major molecular chaperones is regulated by co-chaperones, a diverse cohort of non-client proteins. Since the second edition was released, not only has knowledge deepened on how co-chaperones act as nodes to network and functionalise chaperones, but an understanding of their broader biological function has started to emerge. The third edition provides new and updated chapters highlighting recent developments and emerging themes on co-chaperones, such as their extracellular functions, their role in human disease and their status as putative drug targets. The book is a useful resource for both newcomers and established researchers in the field of cell stress and chaperones, as well as those interested in cross-cutting disciplines such as cellular networks and systems biology.

The book provides an updated panorama of the functional relevance of molecular chaperones in the proper folding of client factors, protein-protein interactions, the regulation of key biological functions, the development of ligand-based structural complexes and the consequent pharmacological or biotechnological applications of these processes. The involvement of molecular chaperones in several processes ranging from regulation of transcription factors and protein-protein interactions in bacteria to proteostasis, signaling pathways and cancer are also addressed. The book is an essential consulting tool for researchers, working professionals in academia or industry, and students of all levels who wish to obtain the most relevant and updated information currently available about protein folding and chaperones.

Assisting Oxidative Protein Folding: How Do Protein Disulphide-Isomerases Couple Conformational and Chemical Processes in Protein Folding?, by A. Katrine Wallis and Robert B. Freedman Peptide Bond cis/trans Isomerases: A Biocatalysis Perspective of Conformational Dynamics in Proteins, by Cordelia Schiene-Fischer, Tobias Aumüller and Gunter Fischer Small Heat-Shock Proteins: Paramedics of the Cell, by Gillian R. Hilton, Hadi Lioe, Florian Stengel, Andrew J. Baldwin und Justin L. P. Benesch Allostery in the Hsp70 Chaperone Proteins, by Erik R. P. Zuiderweg, Eric B. Bertelsen, Aikaterini Rousaki, Matthias P. Mayer, Jason E. Gestwicki and Atta Ahmad Hsp90: Structure and Function, by Sophie E. Jackson Extracellular Chaperones, by Rebecca A. Dabbs, Amy R. Wyatt, Justin J. Yerbury, Heath Ecroyd and Mark R. Wilson

Protein homeostasis, or “Proteostasis”, lies at the heart of human health and disease. From the folding of single polypeptide chains into functional proteins, to the regulation of intracellular signaling pathways, to the secreted signals that coordinate cells in tissues and throughout the body, the proteostasis network operates to support cell health and physiological fitness. However, cancer cells also hijack the proteostasis network and many of these same processes to sustain the growth and spread of tumors. The chapters in this book are written by world experts in the many facets of the proteostasis network. They describe cutting-edge insights into the structure and function of the major chaperone and degradation systems in healthy cells and how these systems are co-opted in cancer cells and the cells of the tumor microenvironment. The chapters also cover therapeutic interventions such as the FDA-approved proteasome inhibitors Velcade and Krypolis as well as other therapies currently under clinical investigation to disarm the ability of the proteostasis network to support malignancy. This compendium is the first of its kind and aims to serve as a reference manual for active investigators and a primer for newcomers to the field. This book is dedicated to the memory of Susan Lindquist, a pioneer of the proteostasis field and a champion of the power of basic scientific inquiry to unlock the mechanisms of human disease. The chapter “Reflections and Outlook on Targeting HSP90, HSP70 and HSF1 in Cancer: A Personal Perspective” is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.

One of the most intriguing discoveries in molecular biology in the last decade is the existence of an evolutionary conserved and essential system, consisting of molecular chaperones and folding catalysts, which promotes the folding of the proteins in the cell. This text summarizes our current knowledge of the cellular roles, the regulation and the mechanism of action of this system. It has a broad scope, covering cell biological, genetic and biochemical aspects of protein folding in cells from bacteria to man. Particularly appropriate to researchers working in basic and applied aspects of molecular medicine, this volume should also prove useful as an up-to-date reference book and as a textbook for specialized university courses.

This book makes a novel synthesis of the molecular aspects of the stress response and long term adaptation processes with the system biology approach of biological networks. Authored by an exciting mixture of top experts and young rising stars, it provides a comprehensive summary of the field and identifies future trends.