This family contains many hypothetical bacterial proteins. This family was previously the N-terminal part of the Pfam DUF1703 (Pfam:PF08011) family before it was split into two. This region is predicted to be an AAA-ATPase domain [1].

1: Realm of PD-(D/E)XK nuclease superfamily revisited: detection of novel families with modified transitive meta profile searches. Knizewski L, Kinch LN, Grishin NV, Rychlewski L, Ginalski K; BMC Struct Biol. 2007;7:40. PMID:17584917