| Literature DB >> 2110531 |
P A Whiteman1, E P Abraham, J E Baldwin, M D Fleming, C J Schofield, J D Sutherland, A C Willis.
Abstract
A study of the final stages of the biosynthesis of the penicillins in Penicillium chrysogenum has revealed two types of enzyme. One hydrolyses phenoxymethyl penicillin to 6-aminopenicillanic acid (6-APA). The other, also obtained from Aspergillus nidulans, transfers a phenylacetyl group from phenylacetyl CoA to 6-APA. The acyltransferase, purified to apparent homogeneity, had a molecular mass of 40 kDa. It also catalyses the conversion of isopenicillin N (IPN) to benzylpenicillin (Pen G) and hydrolyses IPN to 6-APA. In the presence of SDS it dissociates, with loss of activity, into fragments of ca 30 and 10.5 kDa, but activity is regained when these fragments recombine in the absence of SDS.Entities:
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Year: 1990 PMID： 2110531 DOI： 10.1016/0014-5793(90)80224-7
Source DB: PubMed Journal: FEBS Lett ISSN： 0014-5793 Impact factor: 4.124