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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
1996-10-17
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pubmed:abstractText |
Activities of the multicatalytic proteinase complex (MPC) were detected in turtle (Trachemys scripta elegans) liver. The ratio of peptidylglutamyl-peptide bond hydrolyzing, trypsin-like, and chymotrypsin-like activities was 6:2.7:1 for the MPC partially purified by Sepharose CL-6B gel filtration. Molecular mass of the turtle liver enzyme was 940 +/- 46 kD. Nondenaturing PAGE revealed a single band containing MPC activity reacting with peptide substrate. In vivo anoxia exposure (20 h submergence in N2-bubbled water) and subsequent 24 h aerobic recovery stimulated changes in liver protease activity. Peptidylglutamyl-peptide bond hydrolyzing activity of the partially purified MPC increased by 29% during aerobic recovery. Elevated MPC activity during recovery may serve to catabolize specific stress-related proteins or to remove proteins damaged by oxygen free radicals generated upon the reintroduction of oxygen.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
1039-9712
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
38
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
445-51
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:8829603-Aerobiosis,
pubmed-meshheading:8829603-Amino Acid Sequence,
pubmed-meshheading:8829603-Animals,
pubmed-meshheading:8829603-Anoxia,
pubmed-meshheading:8829603-Catalysis,
pubmed-meshheading:8829603-Cysteine Endopeptidases,
pubmed-meshheading:8829603-Energy Metabolism,
pubmed-meshheading:8829603-Homeostasis,
pubmed-meshheading:8829603-Liver,
pubmed-meshheading:8829603-Molecular Sequence Data,
pubmed-meshheading:8829603-Molecular Weight,
pubmed-meshheading:8829603-Multienzyme Complexes,
pubmed-meshheading:8829603-Proteasome Endopeptidase Complex,
pubmed-meshheading:8829603-Protein Biosynthesis,
pubmed-meshheading:8829603-Proteins,
pubmed-meshheading:8829603-Stress, Physiological,
pubmed-meshheading:8829603-Turtles
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pubmed:year |
1996
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pubmed:articleTitle |
Multicatalytic proteinase activity in turtle liver: responses to anoxia stress and recovery.
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pubmed:affiliation |
Institute of Biochemistry, Carleton University, Ottawa, Ontario, Canada.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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