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The beneficial role of proteolysis in skeletal muscle growth and stress adaptation
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The beneficial role of proteolysis in skeletal muscle growth and stress adaptation
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Journal Article
The beneficial role of proteolysis in skeletal muscle growth and stress adaptation
2016
Overview
Muscle atrophy derived from excessive proteolysis is a hallmark of numerous disease conditions. Accordingly, the negative consequences of skeletal muscle protein breakdown often overshadow the critical nature of proteolytic systems in maintaining normal cellular function. Here, we discuss the major cellular proteolysis machinery—the ubiquitin/proteosome system, the autophagy/lysosomal system, and caspase-mediated protein cleavage—and the critical role of these protein machines in establishing and preserving muscle health. We examine how ordered degradation modifies (1) the spatiotemporal expression of myogenic regulatory factors during myoblast differentiation, (2) membrane fusion during myotube formation, (3) sarcomere remodeling and muscle growth following physical stress, and (4) energy homeostasis during nutrient deprivation. Finally, we review the origin and etiology of a number of myopathies and how these devastating conditions arise from inborn errors in proteolysis.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V
Subject
/ Animals
/ Biomedical and Life Sciences
/ Growth
/ Humans
/ Muscle, Skeletal - enzymology
/ Muscle, Skeletal - pathology
/ Muscle, Skeletal - physiopathology
/ Muscles
/ Muscular Atrophy - enzymology
/ Muscular Atrophy - pathology
/ Muscular Atrophy - physiopathology
/ Peptide Hydrolases - metabolism
/ Proteasome Endopeptidase Complex - metabolism
/ Review
