Results 221 to 230 of about 224,032 (260)
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Proteases and proteolysis in the lysosome
Experientia, 1992Proteins sequestered by a non-selective bulk process within the lysosomes turn over with an apparent half-life of about 8 minutes and this rapid lysosomal proteolysis is initiated by endopeptidases, in particular by the cathepsins D and L. We describe also the cathepsins B and H which show mainly exopeptidase and only low endopeptidase activity ...
P, Bohley, P O, Seglen
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Protein oxidation and proteolysis
bchm, 2006Abstract One of the hallmarks of chronic or severe oxidative stress is the accumulation of oxidized proteins, which tend to form high-molecular-weight aggregates. The major proteolytic system responsible for the removal of oxidized cytosolic and nuclear proteins is the proteasome.
Nicolle, Bader, Tilman, Grune
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Proteolysis and Sterol Regulation
Annual Review of Cell and Developmental Biology, 2002▪ Abstract  The mammalian cell continuously adjusts its sterol content by regulating levels of key sterol synthetic enzymes and levels of LDL receptors that mediate uptake of cholesterol-laden particles. Control is brought about by sterol-regulated transcription of relevant genes and by regulated degradation of the committed step enzyme HMG-CoA ...
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Biochemical and Biophysical Research Communications, 1989
The calpain-induced proteolysis of tau associated with twice-cycled microtubules or from a total brain heat-stable fraction was studied. Twice-cycled microtubule tau was rapidly hydrolyzed by calpain. In contrast, tau purified from the total brain heat-stable fraction was very resistant to degradation by calpain.
G V, Johnson, R S, Jope, L I, Binder
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The calpain-induced proteolysis of tau associated with twice-cycled microtubules or from a total brain heat-stable fraction was studied. Twice-cycled microtubule tau was rapidly hydrolyzed by calpain. In contrast, tau purified from the total brain heat-stable fraction was very resistant to degradation by calpain.
G V, Johnson, R S, Jope, L I, Binder
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Ozone and Pulmonary Proteolysis
Annals of Internal Medicine, 1970Excerpt To the editor: In their editorial on antitrypsin deficiency Falk and Briscoe (Ann Intern Med72:427-429, 1970) point out that intrapulmonary proteolysis might be due to either decreased inhi...
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Proteolysis in Bacterial Sporulation
1980Publisher Summary Endospore formation and germination in various Bacillus species provide attractive experimental models for the study of cellular differentiation. These bacteria offer the advantages of easy cultivation and physiological manipulation, the possibility of genetic analysis, and a well-defined, relatively simple unicellular ...
M R, Maurizi, R L, Switzer
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Hsp70s and lysosomal proteolysis
Experientia, 1994Confluent cultured cells activate a lysosomal pathway of polypeptide breakdown in response to withdrawal of serum growth factors. The substrates for this proteolytic pathway are a restricted class of cytosolic polypeptides containing peptide sequences biochemically related to lysine-phenylalanine-glutamate-arginine-glutamine, or, in single amino acid ...
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Peering into proteolysis with presenilins
Journal of Alzheimer's Disease, 2001Presenilins were originally identified because they cause a neurodegenerative disease, but the impact of these proteins on the neuron appears to extend beyond neurodegeneration and into fundamental concepts of cell biology and development. Presenilins were identified as a result of the steady march of molecular genetics which first lead to ...
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