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  • Title: Enzymatic synthesis of the penicillin and cephalosporin nuclei from an acyclic peptide containing carboxymethylcysteine.
    Author: Bowers RJ, Jensen SE, Lyubechansky L, Westlake DW, Wolfe S.
    Journal: Biochem Biophys Res Commun; 1984 Apr 30; 120(2):607-13. PubMed ID: 6547336.
    Abstract:
    The tripeptide delta-(L- carboxymethylcysteinyl )-L-cysteinyl-D-valine (L-CMC-CV) is converted sequentially into the CMC analog of isopenicillin N, the CMC analog of penicillin N, and the CMC analog of desacetoxycephalosporin C by, respectively, isopenicillin N synthetase, isopenicillin N epimerase, and desacetoxycephalosporin C synthetase, all isolated from the beta-lactam producing prokaryote Streptomyces clavuligerus.
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