This domain family is found in bacteria and eukaryotes, and is approximately 20 amino acids in length. The family is found in association with Pfam:PF02572. Cob(I)alamin adenosyltransferase adenosylates Co(I) in an ATP-dependent manner in the conversion of aquacobalamin to its coenzyme form. This is the third step in this process, after two steps involved in the reduction of Co(III) to Co(I).

1: Purification and partial characterization of Cob(I)alamin adenosyltransferase from Pseudomonas denitrificans. Debussche L, Couder M, Thibaut D, Cameron B, Crouzet J, Blanche F; J Bacteriol. 1991;173:6300-6302. PMID:1917862