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Structure of a hexameric multiheme c nitrite reductase from the extremophile bacterium Thiolkalivibrio nitratireducens

Source organism: Thioalkalivibrio nitratireducens
Biochemical function: metal ion binding
Biological process: ammonium ion metabolic process
Cellular component: periplasmic space

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EC 1.7.2.2: Nitrite reductase (cytochrome; ammonia-forming)

Reaction catalysed:
NH(3) + 2 H(2)O + 6 ferricytochrome c = nitrite + 6 ferrocytochrome c + 7 H(+)
Systematic name:
Ammonia:ferricytochrome-c oxidoreductase
Alternative Name(s):
  • Cytochrome c nitrite reductase
  • Cytochrome c552
  • Multiheme nitrite reductase

GO terms

Sequence family

Pfam Protein family (Pfam)
PF02335
Domain description: Cytochrome c552
Occurring in:
  1. Cytochrome c-552
The deposited structure of PDB entry 2ot4 contains 2 copies of Pfam domain PF02335 (Cytochrome c552) in Cytochrome c-552. Showing 1 copy in chain A.

InterPro InterPro annotations
IPR003321
Domain description: Cytochrome c552
Occurring in:
  1. Cytochrome c-552
IPR036280
Domain description: Multiheme cytochrome superfamily
Occurring in:
  1. Cytochrome c-552

Structure domains

CATH CATH domains
1.20.140.10
Class: Mainly Alpha
Architecture: Up-down Bundle
Topology: Butyryl-CoA Dehydrogenase, subunit A; domain 3
Homology: Butyryl-CoA Dehydrogenase, subunit A, domain 3
Occurring in:
  1. Cytochrome c-552
The deposited structure of PDB entry 2ot4 contains 2 copies of CATH domain 1.20.140.10 (Butyryl-CoA Dehydrogenase, subunit A; domain 3) in Cytochrome c-552. Showing 1 copy in chain A.
1.10.1130.10
Class: Mainly Alpha
Architecture: Orthogonal Bundle
Topology: Flavocytochrome C3; Chain A, domain 2
Homology: Flavocytochrome C3; Chain A
Occurring in:
  1. Cytochrome c-552
The deposited structure of PDB entry 2ot4 contains 2 copies of CATH domain 1.10.1130.10 (Flavocytochrome C3; Chain A, domain 2) in Cytochrome c-552. Showing 1 copy in chain A.
1.10.287.3080
Class: Mainly Alpha
Architecture: Orthogonal Bundle
Topology: Helix Hairpins
Homology: Helix Hairpins
Occurring in:
  1. Cytochrome c-552
The deposited structure of PDB entry 2ot4 contains 2 copies of CATH domain 1.10.287.3080 (Helix Hairpins) in Cytochrome c-552. Showing 1 copy in chain A.

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