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Author: Harold L. Segal Publisher: Academic Press ISBN: 1483220192 Category : Science Languages : en Pages : 811
Book Description
Protein Turnover and Lysosome Function comprises the proceedings of a symposium under the same title held at the State University of New York at Buffalo on August 21-26, 1977. The book discusses mechanisms of protein turnover, as well as the identification and characterization of intracellular proteases. The text also describes the internalization of macromolecules into the intracellular digestive system; the types of specificity entailed; and the fate of the membrane material involved in the vacuolization process. Biochemists, pathologists, cell biologists, molecular biologists, and physiologists will find the book invaluable.
Author: Harold L. Segal Publisher: Academic Press ISBN: 1483220192 Category : Science Languages : en Pages : 811
Book Description
Protein Turnover and Lysosome Function comprises the proceedings of a symposium under the same title held at the State University of New York at Buffalo on August 21-26, 1977. The book discusses mechanisms of protein turnover, as well as the identification and characterization of intracellular proteases. The text also describes the internalization of macromolecules into the intracellular digestive system; the types of specificity entailed; and the fate of the membrane material involved in the vacuolization process. Biochemists, pathologists, cell biologists, molecular biologists, and physiologists will find the book invaluable.
Author: A.J. Rivett Publisher: Elsevier Science ISBN: 9780762303878 Category : Science Languages : en Pages : 0
Book Description
This volume brings together a set of reviews that provide a summary of our current knowledge of the proteolytic machinery and of the pathways of protein breakdown of prokaryotic and eukaryotic cells. Intracellular protein degradation is much more than just a mechanism for the removal of incorrectly folded or damaged proteins. Since many short-lived proteins have important regulatory functions, proteolysis makes a significant contribution to many cellular processes including cell cycle regulation and transciptional control. In addition, limited proteolytic cleavage can provide a rapid and efficient mechanism of enzyme activation or inactivation in eukaryotic cells. In the first chapter, Maurizi provides an introduction to intracellular protein degradation, describes the structure and functions of bacterial ATP-dependent proteases, and explores the relationship between chaperone functions and protein degradation. Many of the principles also apply to eukaryotic cells, although the proteases involved are often not the same. Interestingly, homologues of one of the bacterial proteases, Ion protease, have been found in mitochondria in yeast and mammals, and homologues of proteasomes, which are found in all eukaryotic cells (see below), have been discovered in some eubacteria. Studies of proteolysis in yeast have contributed greatly to the elucidation of both lysosomal (vacuolar) and nonlysosomal proteolytic pathways in eukaryotic cells. Thumm and Wolf (chapter 2) describe studies that have elucidated the functions of proteasomes in nonlysosomal proteolysis and the contributions of lysosomal proteases to intracellular protein breakdown. Proteins can be selected for degradation by a variety of differen mechanisms. The ubiquitin system is one complex and highly regulated mechanism by which eukaryotic proteins are targetted for degradation by proteosomes. In chapter 3, Wilkinson reviews the components and functions of the ubiquitin system and considers some of the known substrates for this pathway which include cell cycle and transcriptional regulators. The structure and functions of proteosomes and their regulatory components are described in the two subsequent chapters by Tanaka and Tanahashi and by Dubiel and Rechsteiner. Proteasomes were the first known example of threonine proteases. They are multisubunit complexes that, in addition to being responsible for the turnover of most short-lived nuclear and cytoplasmic protein, are also involved in antigen processing for presentation by the MHC class I pathway. Recent studies reviewed by McCracken and colleagues (chapter 6) lead to the exciting conclusion that some ER-associated proteins are degraded by cytosolic proteasomes. Lysosomes are responsible for the degradation of long-lived proteins and for the enhanced protein degradation observed under starvation conditions. In chapter 7 Knecht and colleagues review the lysosomal proteases and describe studies of the roles of lysosomes and the mechanisms for protein uptake into lysosomes. Methods of measuring the relative contribution of different proteolytic systems (e.g., ubiquitin-proteasome pathway, calcium-dependent proteases, lysosomes) to muscle protein degradation, and the conclusions from such studies, are reviewed by Attai and Taillinder in the following chapter. Finally, proteases play an important role in signaling apoptosis by catalyzing the limited cleavage of enzymes. Mason and Beyette review the role of the major players, caspases, which are both activated by and catalyze limite proteolysis, and also consider the involvement of other protoelytic enzymes in this pathway leading cell death.
Author: Koichi Suzuki Publisher: Springer Science & Business Media ISBN: 1461303354 Category : Medical Languages : en Pages : 303
Book Description
The Tenth International Conference on Intracellular Protein Catabolism was held in Tokyo Japan, October 30-November 3, 1994. under the auspices of the International Committee on Proteolysis (lCOP). ICOP meetings have been held biennially in the USA, Europe, and Japan in turn. The previous three ICOP meetings (7th to 9th) were held in Shimoda, Japan, in 1988. in WildbadKreuth, Germany, in 1990, and in Williamsburg. Virginia, in 1992. Previous meetings were held in resort areas, this was the first meeting held in a large city. Attendance has grown every year so that nearly 400 participants from 19 different countries attended the Tokyo meeting. At the meeting, novel and updated results on the structure-function. physiology, biology, and pathology of proteases and inhibitors were discussed, together with cellular aspects of proteolysis and protein turnover. Thirty-nine invited papers and eight selected posters were presented orally and 171 poster presentations were discussed. This book documents almost all of the lectures and some selected posters. Since the world of proteolysis and protein turnover is expanding very rapidly. far beyond our expectations, it is impossible to cover all the new aspects of this field. However, this book will give an idea of the current status, trends. and directions of the field, and information necessary to understand what is and will be important in this field. Further. the editors hope that the novel ideas, approaches. methodologies, and important findings described in this book will stimulate further study on proteolysis and protein turnover.
Author: S. Rapoport Publisher: Elsevier ISBN: 1483188523 Category : Science Languages : en Pages : 192
Book Description
Processing and Turnover of Proteins and Organelles in the Cell is a collection of papers that tackles the problems of post-translational processes, along with the dynamics of cell components. The materials in the title are organized thematically. The text first presents articles dealing with post-translational processing, such as the mode of anchoring of sucrase-isomaltase to the small intestinal brush-border membrane and its biosynthetic implications, as well as the decay and restoring in succinate dehydrogenase. The next papers discuss topics related to the selective degradation of proteins, such as selective control of proteinase action in yeast cells and studies of the mechanism and selectivity of intracellular protein breakdown. The final set of papers covers the turnover of organelles, which includes biogenesis and turnover of peroxisomes, and the effect of oxygen on the synthesis of mitochondrial proteins in Saccharomyces cerevisiae. The book will be of great use to microbiologists and biochemists. Scientists from biological science disciplines will also benefit from the text.
Author: A.J. Rivett Publisher: Elsevier Science ISBN: 9780762303878 Category : Science Languages : en Pages : 0
Book Description
This volume brings together a set of reviews that provide a summary of our current knowledge of the proteolytic machinery and of the pathways of protein breakdown of prokaryotic and eukaryotic cells. Intracellular protein degradation is much more than just a mechanism for the removal of incorrectly folded or damaged proteins. Since many short-lived proteins have important regulatory functions, proteolysis makes a significant contribution to many cellular processes including cell cycle regulation and transciptional control. In addition, limited proteolytic cleavage can provide a rapid and efficient mechanism of enzyme activation or inactivation in eukaryotic cells. In the first chapter, Maurizi provides an introduction to intracellular protein degradation, describes the structure and functions of bacterial ATP-dependent proteases, and explores the relationship between chaperone functions and protein degradation. Many of the principles also apply to eukaryotic cells, although the proteases involved are often not the same. Interestingly, homologues of one of the bacterial proteases, Ion protease, have been found in mitochondria in yeast and mammals, and homologues of proteasomes, which are found in all eukaryotic cells (see below), have been discovered in some eubacteria. Studies of proteolysis in yeast have contributed greatly to the elucidation of both lysosomal (vacuolar) and nonlysosomal proteolytic pathways in eukaryotic cells. Thumm and Wolf (chapter 2) describe studies that have elucidated the functions of proteasomes in nonlysosomal proteolysis and the contributions of lysosomal proteases to intracellular protein breakdown. Proteins can be selected for degradation by a variety of differen mechanisms. The ubiquitin system is one complex and highly regulated mechanism by which eukaryotic proteins are targetted for degradation by proteosomes. In chapter 3, Wilkinson reviews the components and functions of the ubiquitin system and considers some of the known substrates for this pathway which include cell cycle and transcriptional regulators. The structure and functions of proteosomes and their regulatory components are described in the two subsequent chapters by Tanaka and Tanahashi and by Dubiel and Rechsteiner. Proteasomes were the first known example of threonine proteases. They are multisubunit complexes that, in addition to being responsible for the turnover of most short-lived nuclear and cytoplasmic protein, are also involved in antigen processing for presentation by the MHC class I pathway. Recent studies reviewed by McCracken and colleagues (chapter 6) lead to the exciting conclusion that some ER-associated proteins are degraded by cytosolic proteasomes. Lysosomes are responsible for the degradation of long-lived proteins and for the enhanced protein degradation observed under starvation conditions. In chapter 7 Knecht and colleagues review the lysosomal proteases and describe studies of the roles of lysosomes and the mechanisms for protein uptake into lysosomes. Methods of measuring the relative contribution of different proteolytic systems (e.g., ubiquitin-proteasome pathway, calcium-dependent proteases, lysosomes) to muscle protein degradation, and the conclusions from such studies, are reviewed by Attai and Taillinder in the following chapter. Finally, proteases play an important role in signaling apoptosis by catalyzing the limited cleavage of enzymes. Mason and Beyette review the role of the major players, caspases, which are both activated by and catalyze limite proteolysis, and also consider the involvement of other protoelytic enzymes in this pathway leading cell death.
Author: Harold L. Segal
Author: Harold L. Segal
Author: Harold L. Segal
Author: H. Glaumann
Author: A.J. Rivett
Author: Willem Huisman
Author: Robert T. Schimke
Author: Sarah Olenick
Author: Koichi Suzuki
Author: S. Rapoport
Author: A.J. Rivett