The Gmad1 domain is found associated with the GerMN family, Pfam:PF10646, in bacterial spore formation. It is predicted to have a beta-propeller fold and to have a passive binding role rather than a catalytic function owing to the low number of conserved hydrophilic residues.

1: MtrAB-LpqB: a conserved three-component system in actinobacteria?. Hoskisson PA, Hutchings MI; Trends Microbiol. 2006;14:444-449. PMID:16934981