ID 2.1.1.315 DE 27-O-demethylrifamycin SV methyltransferase. CA 27-O-demethylrifamycin SV + S-adenosyl-L-methionine = H(+) + rifamycin SV CA + S-adenosyl-L-homocysteine. CC -!- The enzyme, characterized from the bacterium Amycolatopsis CC mediterranei, is involved in biosynthesis of the antitubercular drug CC rifamycin B. DR G0FUS0, DMRMT_AMYMS; //