M. Sugiyama et al., INACTIVATION OF BLEOMYCIN BY AN N-ACETYLTRANSFERASE IN THE BLEOMYCIN-PRODUCING STRAIN STREPTOMYCES-VERTICILLUS, FEMS microbiology letters, 121(1), 1994, pp. 81-85
Bleomycin-producing Streptomyces verticillus ATCC15003 possesses a ble
omycin acetyltransferase which inactivates the drug in the presence of
acetyl coenzyme A. The site of acylation in enzymically prepared acet
ylbleomycin A2 was determined by nuclear magnetic resonance analysis;
the primary amino group of the beta-aminoalanine moiety of bleomycin w
as acetylated. Acetylbleomycin A2 had no detectable antibacterial acti
vity and did not induce in vitro DNA degradation.