Proteostasis And Proteolysis

Proteostasis integrates biological pathways controlling biogenesis, trafficking, folding, and degradation of proteins. This book focuses on two protein breakdown/degradation processes (proteolysis), which are part of a normally functioning proteostatic system: the ubiquitin-proteasome system and autophagy. Chapter 2 of this book is freely available as a downloadable Open Access PDF at http://www.taylorfrancis.com under a Creative Commons Attribution-Non Commercial-No Derivatives (CC-BY-NC-ND) 4.0 license.

Proper folding of proteins is crucial for cell function. Chaperones and enzymes that post-translationally modify newly synthesized proteins help ensure that proteins fold correctly, and the unfolded protein response functions as a homeostatic mechanism that removes misfolded proteins when cells are stressed. This book covers the entire spectrum of proteostasis in healthy cells and the diseases that result when control of protein production, protein folding, and protein degradation goes awry.

This book, written by members of the European network PROTEOSTASIS, provides an up-to-date review of the research regarding protein homeostasis in health and disease. With new discoveries contributing to the increasing complexity of this topic, the book offers a detailed overview of the pathways regulating protein homeostasis, including autophagy and the ubiquitin protein family. Following a basic introduction, it explains how defects in protein homeostasis contribute to numerous pathologies, including cancer, neurodegeneration, inflammation and a number of rare diseases. In addition, it discusses, the role of protein homeostasis in cellular development and physiology. Highlighting the latest research in the field of protein homeostasis and its implications for various clinically relevant diseases, the book appeals to researchers and clinicians, while also offering a reference guide for scholars who are new to the field.

A Comprehensive Guide to Crucial Attributes of Therapeutic Proteins in Biological Pharmaceuticals With this book, Dr. Raju offers a valuable resource for professionals involved in research and development of biopharmaceutical and biosimilar drugs. This is a highly relevant work, as medical practitioners have increasingly turned to biopharmaceutical medicines in their search for safe and reliable treatments for complex diseases, while pharmaceutical researchers seek to expand the availability of biopharmaceuticals and create more affordable biosimilar alternatives. Readers receive a thorough overview of the major co-translational modifications (CTMs) and post-translational modifications (PTMs) of therapeutic proteins relevant to the development of biotherapeutics. The majority of chapters detail individual CTMs and PTMs that may affect the physicochemical, biochemical, biological, pharmacokinetic, immunological, toxicological etc. properties of proteins. In addition, readers are guided on the methodology necessary to analyze and characterize these modifications. Thus, readers gain not only an understanding of CTMs/PTMs, but also the ability to design and assess their own structure-function studies for experimental molecules. Specific features and topics include: Discussion of the research behind and expansion of biopharmaceuticals Twenty chapters detailing relevant CTMs and PTMs of proteins, such as glycosylation, oxidation, phosphorylation, methylation, proteolysis, etc. Each chapter offers an introduction and guide to the mechanisms and biological significance of an individual CTM or PTM, including practical guidance for experiment design and analysis An appendix of biologic pharmaceuticals currently on the market, along with an assessment of their PTMs and overall safety and efficacy This volume will prove a key reference on the shelves of industry and academic researchers involved in the study and development of biochemistry, molecular biology, biopharmaceuticals and proteins in medicine, particularly as biopharmaceuticals and biosimilars become ever more prominent tools in the field of healthcare.

This book contains an extensive collection of critical reviews, from leading researchers in the field of regulated protein degradation. It covers the role of regulated proteolysis in a range of microorganisms (from Gram positive, Gram negative and pathogenic bacteria to Archaea and the Baker’s yeast Saccharomyces cerevisiae).

The entire life cycle of a protein-from synthesis and folding to transport and degradation-is carefully controlled by the proteostasis network. This network, consisting of many interconnected pathways and processes, manages protein homeostasis by dynamically responding to the needs of the cell. Stress and aging can challenge the proteostasis network, resulting in the aggregation of misfolded proteins-a feature of numerous neurodegenerative conditions. Written and edited by experts in the field, this collection from Cold Spring Harbor Perspectives in Biology provides a comprehensive update on how the proteostasis network functions in healthy cells and the diseases that result when protein quality control goes awry. The contributors examine the relevant biochemical attributes of proteins (e.g., solubility), the functions of normal protein aggregates (e.g., biofilm formation in bacteria), and the various heat shock proteins, chaperones, translocation machineries, proteasomes, signaling factors, and transcriptional programs involved in proteostasis. The roles of specific subcellular structures-the endoplasmic reticulum, mitochondria, ribosomes, lysosomes, and cytoplasm-in protein quality control are covered, as is the regulation of proteostasis at the organismal level (e.g., via neuronal activity). Discussions of the responses by cells when errors in protein quality control occur, the medical disorders that can result (e.g., Alzheimer disease), and pharmacologic approaches to ameliorate protein conformational disorders are also included. This book is therefore an essential reference for biochemists, cell biologists, and all biomedical scientists wishing to understand the pathological consequences of and potential therapies for proteostasis deficiencies in common human diseases.

Plant proteases are involved in most aspects of plant physiology and development, playing key roles in the generation of signaling molecules and as regulators of essential cellular processes such as cell division and metabolism. They take part in important pathways like protein turnover by the degradation of misfolded proteins and the ubiquitin-proteasome pathway, and they are responsible for post-translational modifications of proteins by proteolysis at highly specific sites. Proteases are also implicated in a great variety of environmentally controlled processes, including mobilization of storage proteins during seed germination, development of seedlings, senescence, programmed cell death and defense mechanisms against pests and pathogens. However, in spite of their importance, little is known about the functions and mode of actions of specific plant proteases. This Research Topic collects contributions covering diverse aspects of plant proteases research.