Dabbs E R, Yazawa K, Mikami Y, Miyaji M, Morisaki N, Iwasaki S, Furihata K
Division of Experimental Chemotherapy, Chiba University, Japan.
Antimicrob Agents Chemother. 1995 Apr;39(4):1007-9. doi: 10.1128/AAC.39.4.1007.
Several fast-growing Mycobacterium strains were found to inactivate rifampin. Two inactivated compounds (RIP-Ma and RIP-Mb) produced by these organisms were different from previously reported derivatives, i.e., phosphorylated or glucosylated derivatives, of the antibiotic. The structures of RIP-Ma and RIP-Mb were determined to be those of 3-formyl-23-[O-(alpha-D-ribofuranosyl)]rifamycin SV and 23-[O-(alpha-D-ribofuranosyl)]rifampin, respectively. To our knowledge, this is the first known example of ribosylation as a mechanism of antibiotic inactivation.
发现几种快速生长的分枝杆菌菌株可使利福平失活。这些菌株产生的两种失活化合物(RIP-Ma和RIP-Mb)与先前报道的该抗生素的衍生物(即磷酸化或糖基化衍生物)不同。RIP-Ma和RIP-Mb的结构分别确定为3-甲酰基-23-[O-(α-D-呋喃核糖基)]利福霉素SV和23-[O-(α-D-呋喃核糖基)]利福平的结构。据我们所知,这是核糖基化作为抗生素失活机制的首个已知实例。