Linked Life Data

6765945

Source:http://linkedlifedata.com/resource/pubmed/id/6765945

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1980-2-26
pubmed:abstractText
Phenylpropynal is a specific, irreversible, non-beta-lactam inhibitor of typical beta-lactamases. In the presence of millimolar concentrations of phenylpropynal, the beta-lactamase I of Bacillus cereus and the beta-lactamases of Staphylococcus aureus and Escherichia coli become completely inactivated; the beta-lactamase II of B. cereus is not affected. The E. coli beta-lactamase is considerably more sensitive to the reagent than the gram-positive enzymes. A variety of structural analogs of phenylpropynal are much less effective inhibitors. Bovine alpha-chymotrypsin, bovine carboxypeptidase A, and the D,D-carboxypeptidase/transpeptidase of Streptomyces R-61 were not inactivated by phenylpropynal. The inactivation of the E. coli beta-lactamase can be significantly retarded when the good substrate benzylpenicillin is also present. The development of a characteristic chromophore (lambda max 318 nm) during beta-lactamase inactivation suggests that covalent modification of the enxymes is involved; arginine and/or lysine modification is indicated.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
10
pubmed:volume
255
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
45-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Phenylpropynal, a specific, irreversible, non-beta-lactam inhibitor of beta-lactamases.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.