Members of this are family are a B12-binding domain/radical SAM domain protein required for 3-methylhopanoid production. Activity was confirmed by mutant phenotype by disrupting this gene in Methylococcus capsulatus strain Bath. This protein family should only occur in genomes that encode a squalene-hopene cyclase (see TIGR01507). [Fatty acid and phospholipid metabolism, Biosynthesis]
Jiyao W et al.(2023). "The conserved domain database in 2023.",