This domain family is found in bacteria, and is approximately 40 amino acids in length. The family is found in association with Pfam:PF07728. There are two completely conserved residues (P and F) that may be functionally important. This family is the N terminal of the CobS subunit of cobaltochelatase. Cobaltochelatase belongs to the AAA+ superfamily of proteins. CobS and CobT form a chaperone like complex.

1: The AAA(+) motor complex of subunits CobS and CobT of cobaltochelatase visualized by single particle electron microscopy. Lundqvist J, Elmlund D, Heldt D, Deery E, Soderberg CA, Hansson M, Warren M, Al-Karadaghi S; J Struct Biol. 2009;167:227-234. PMID:19545636