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J Antibiot (Tokyo). 1991 Jun;44(6):626-34.

Metabolic products of microorganisms. 258. Enzymatic bromination of nikkomycin Z.

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Biologisches Institut, Universität Tübingen, Germany.


Two brominated nikkomycins were produced by enzymatic halogenation of nikkomycin Z in the presence of a nonheme bromoperoxidase isolated from Streptomyces aureofaciens Tü 24. The monobrominated and dibrominated nikkomycin Z derivatives were substituted at the hydroxypyridyl moiety of the N-terminal amino acid of nikkomycin Z at position C-6"' (ZBr) or C-4"' and C-6"' (ZBr2). The brominated nikkomycin Z derivatives had a decreased affinity to chitin synthase of Coprinus cinereus as compared to nikkomycin Z and exhibited a low inhibitory activity towards various fungi and yeasts.

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