This family includes CobD proteins from a number of bacteria, in Salmonella this protein is called Cbib. Salmonella CobD is a different protein [1]. This protein is involved in cobalamin biosynthesis and is probably an enzyme responsible for the conversion of adenosylcobyric acid to adenosylcobinamide or adenosylcobinamide phosphate [1].

1: Identification and sequence analysis of genes involved in late steps in cobalamin (vitamin B12) synthesis in Rhodobacter capsulatus. Pollich M, Klug G; J Bacteriol 1995;177:4481-4487. PMID:7635831

2: CobD, a novel enzyme with L-threonine-O-3-phosphate decarboxylase activity, is responsible for the synthesis of (R)-1-amino-2-propanol O-2-phosphate, a proposed new intermediate in cobalamin biosynthesis in Salmonella typhimurium LT2. Brushaber KR, O'Toole GA, Escalante-Semerena JC; J Biol Chem 1998;273:2684-2691. PMID:9446573