Hydroxylamine reductase (IPR010048)

Short name: Hydroxylam_reduct

Overlapping homologous superfamilies

Family relationships


Hybrid cluster proteins (HCP, or Prismane) have been identified in bacteria, archaea and eukaryotic protozoa. No specific function has yet been assigned to these proteins, but it may involve oxidoreductase enzymatic activity. These proteins contain one 4Fe-4S cluster, and one hybrid 4Fe-2O-2S cluster, the latter being similar to the Ni-Fe-S cluster found in carbon monoxide dehydrogenase enzymes (IPR010047) [PMID: 12764602, PMID: 14646063].

This subfamily is heterogeneous with respect to the presence or absence of a region of about 100 amino acids not far from the N terminus of the protein. Members have been described as monomeric. The general function is unknown, although members from E. coli and several other species have hydroxylamine reductase activity. Members are found in various bacteria, in Archaea, and in several parasitic eukaryotes: Giardia intestinalis, Trichomonas vaginalis, and Entamoeba histolytica.

GO terms

Biological Process

GO:0055114 oxidation-reduction process

Molecular Function

GO:0051536 iron-sulfur cluster binding
GO:0016661 oxidoreductase activity, acting on other nitrogenous compounds as donors

Cellular Component

GO:0005737 cytoplasm

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.