This domain is about 100 amino acid residues in length. It is found in the MazG protein from E. coli. It contains four conserved negatively charged residues that probably form an active site or metal binding site. This domain is found in isolation in some proteins as well as associated with Pfam:PF00590. This domain is clearly related to Pfam:PF01503 another pyrophosphohydrolase involved in histidine biosynthesis. This family may be structurally related to the NUDIX domain Pfam:PF00293 (Bateman A pers. obs.).

1: MazG, a nucleoside triphosphate pyrophosphohydrolase, interacts with Era, an essential GTPase in Escherichia coli. Zhang J, Inouye M; J Bacteriol 2002;184:5323-5329. PMID:12218018