pfam02572: CobA_CobO_BtuR (This model is not part of the current CDD release)
ATP:corrinoid adenosyltransferase BtuR/CobO/CobP
This family consists of the BtuR, CobO, CobP proteins all of which are Cob(I)alamin adenosyltransferase, EC:2.5.1.17, involved in cobalamin (vitamin B12) biosynthesis. These enzymes catalyze the adenosylation reaction: ATP + cob(I)alamin + H2O <=> phosphate + diphosphate + adenosylcobalamin.