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AIR synthase (PurM) related protein, archaeal subgroup 2 of unknown function. The family of PurM related proteins includes Hydrogen expression/formation protein HypE, AIR synthases, FGAM synthase and Selenophosphate synthetase (SelD). They all contain two conserved domains and seem to dimerize. The N-terminal domain forms the dimer interface and is a putative ATP binding domain.
Jiyao W et al.(2023). "The conserved domain database in 2023.",