Ubiquitin-proteasome-dependent proteolysis in skeletal muscle. 1998

D Attaix, and E Aurousseau, and L Combaret, and A Kee, and D Larbaud, and C Rallière, and B Souweine, and D Taillandier, and T Tilignac
Centre de recherche en nutrition humaine de Clermont-Ferrand, Ceyrat, France. attaix@clermont.inra.fr

The ubiquitin-proteasome proteolytic pathway has recently been reported to be of major importance in the breakdown of skeletal muscle proteins. The first step in this pathway is the covalent attachment of polyubiquitin chains to the targeted protein. Polyubiquitylated proteins are then recognized and degraded by the 26S proteasome complex. In this review, we critically analyse recent findings in the regulation of this pathway, both in animal models of muscle wasting and in some human diseases. The identification of regulatory steps of ubiquitin conjugation to protein substrates and/or of the proteolytic activities of the proteasome should lead to new concepts that can be used to manipulate muscle protein mass. Such concepts are essential for the development of anti-cachectic therapies for many clinical situations.

UI MeSH Term Description Entries
D009097 Multienzyme Complexes Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES. Complexes, Multienzyme
D009124 Muscle Proteins The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN. Muscle Protein,Protein, Muscle,Proteins, Muscle
D010450 Endopeptidases A subclass of PEPTIDE HYDROLASES that catalyze the internal cleavage of PEPTIDES or PROTEINS. Endopeptidase,Peptide Peptidohydrolases
D003546 Cysteine Endopeptidases ENDOPEPTIDASES which have a cysteine involved in the catalytic process. This group of enzymes is inactivated by CYSTEINE PROTEINASE INHIBITORS such as CYSTATINS and SULFHYDRYL REAGENTS.
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014452 Ubiquitins A family of proteins that are structurally-related to Ubiquitin. Ubiquitins and ubiquitin-like proteins participate in diverse cellular functions, such as protein degradation and HEAT-SHOCK RESPONSE, by conjugation to other proteins. Ubiquitin-Like Protein,Ubiquitin-Like Proteins,Protein, Ubiquitin-Like,Proteins, Ubiquitin-Like,Ubiquitin Like Protein,Ubiquitin Like Proteins
D046988 Proteasome Endopeptidase Complex A large multisubunit complex that plays an important role in the degradation of most of the cytosolic and nuclear proteins in eukaryotic cells. It contains a 700-kDa catalytic sub-complex and two 700-kDa regulatory sub-complexes. The complex digests ubiquitinated proteins and protein activated via ornithine decarboxylase antizyme. 20S Proteasome,Ingensin,Macropain,Macroxyproteinase,Multicatalytic Endopeptidase Complex,Multicatalytic Proteinase,Prosome,Proteasome,Complex, Multicatalytic Endopeptidase,Complex, Proteasome Endopeptidase,Endopeptidase Complex, Multicatalytic,Endopeptidase Complex, Proteasome,Proteasome, 20S,Proteinase, Multicatalytic
D018482 Muscle, Skeletal A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles. Anterior Tibial Muscle,Gastrocnemius Muscle,Muscle, Voluntary,Plantaris Muscle,Skeletal Muscle,Soleus Muscle,Muscle, Anterior Tibial,Muscle, Gastrocnemius,Muscle, Plantaris,Muscle, Soleus,Muscles, Skeletal,Muscles, Voluntary,Skeletal Muscles,Tibial Muscle, Anterior,Voluntary Muscle,Voluntary Muscles

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