cd03172: SORL_classII (this model, PSSM-Id:28803 is obsolete and has been replaced by 239422)
Superoxide reductase-like (SORL) domain, class II; SORL-domains are present in a family of mononuclear non-heme iron proteins that includes superoxide reductase and desulfoferrodoxin. Superoxide reductase-like proteins scavenge superoxide anion radicals as a defense mechanism against reactive oxygen species and are found in anaerobic bacteria and archeae, and microaerophilic Treponema pallidum. The SORL domain contains an active iron site, Fe[His4Cys(Glu)], which in the reduced state loses the glutamate ligand. Superoxide reductase (class II) forms a homotetramer with four Fe[His4Cys(Glu)] centers.