ID 5.4.99.61 DE precorrin-8X methylmutase. AN HBA synthase. AN hydrogenobyrinic acid-binding protein. AN precorrin isomerase. CA 3 H(+) + precorrin-8X = hydrogenobyrinate. CC -!- The enzyme, which participates in the aerobic (late cobalt insertion) CC adenosylcobalamin biosynthesis pathway, catalyzes the conversion of CC precorrin-8X to hydrogenobyrinate by methyl rearrangement. CC -!- The equivalent enzyme in the anaerobic pathway is EC 5.4.99.60. CC -!- Formerly EC 5.4.1.2. DR P63840, COBH_MYCBO ; P9WP86, COBH_MYCTO ; P9WP87, COBH_MYCTU ; DR Q9HZU2, COBH_PSEAE ; P21638, COBH_SINSX ; //