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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
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pubmed:dateCreated |
1984-5-21
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pubmed:abstractText |
Amastatin [(2S,3R)-3-amino-2-hydroxy-5-methylhexanoyl-L-valyl-L-valyl-L- aspartic acid] and bestatin [(2S,3R)-3-amino-2-hydroxy-4-phenylbutanoyl-L-leucine] are slow-binding, competitive inhibitors of aminopeptidase M (AP-M) with net inhibition constants (Ki) of 1.9 X 10(-8) and 4.1 X 10(-6) M, respectively. The effect of inhibitor structure on net Ki and on slow-binding inhibition was evaluated for analogues of both inhibitors on AP-M and leucine aminopeptidase (LAP). The (2S)-hydroxyl group contributes to the stabilization of a collision complex [EI], which is formed rapidly. In contrast, increasing the peptide chain length of the inhibitor produces more potent inhibitors as a consequence of a slower binding process. A statine analogue of amastatin [(3S,4S)-Sta-Val-Val-Asp] stimulated rather than inhibited LAP. AP-M binds tri- and tetrapeptide inhibitors more strongly than dipeptide inhibitors, whereas LAP binds dipeptide inhibitors more strongly. The difference in binding can be used to distinguish cytosolic from membrane-bound aminopeptidases.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Aminopeptidases,
http://linkedlifedata.com/resource/pubmed/chemical/Anti-Bacterial Agents,
http://linkedlifedata.com/resource/pubmed/chemical/Antibiotics, Antineoplastic,
http://linkedlifedata.com/resource/pubmed/chemical/Antigens, CD13,
http://linkedlifedata.com/resource/pubmed/chemical/Leucine,
http://linkedlifedata.com/resource/pubmed/chemical/Leucyl Aminopeptidase,
http://linkedlifedata.com/resource/pubmed/chemical/Oligopeptides,
http://linkedlifedata.com/resource/pubmed/chemical/Peptides,
http://linkedlifedata.com/resource/pubmed/chemical/amastatin,
http://linkedlifedata.com/resource/pubmed/chemical/bestatin
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pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
0022-2623
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
27
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
417-22
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:6142952-Aminopeptidases,
pubmed-meshheading:6142952-Anti-Bacterial Agents,
pubmed-meshheading:6142952-Antibiotics, Antineoplastic,
pubmed-meshheading:6142952-Antigens, CD13,
pubmed-meshheading:6142952-Kinetics,
pubmed-meshheading:6142952-Leucine,
pubmed-meshheading:6142952-Leucyl Aminopeptidase,
pubmed-meshheading:6142952-Oligopeptides,
pubmed-meshheading:6142952-Peptides,
pubmed-meshheading:6142952-Structure-Activity Relationship
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pubmed:year |
1984
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pubmed:articleTitle |
Inhibition of aminopeptidases by amastatin and bestatin derivatives. Effect of inhibitor structure on slow-binding processes.
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pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't
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