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Crystal Structure of Cytochrome b561

Source organism: Arabidopsis thaliana
Biochemical function: transmembrane ascorbate ferrireductase activity
Biological process: transmembrane transport
Cellular component: membrane

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EC 7.2.1.3: Ascorbate ferrireductase (transmembrane)

Reaction catalysed:
Ascorbate(Side 1) + Fe(III)(Side 2) = monodehydroascorbate(Side 1) + Fe(II)(Side 2)
Systematic name:
Fe(III):ascorbate oxidorectuctase (electron-translocating)
Alternative Name(s):
  • Cytochrome b(561)

GO terms

Sequence family

Pfam Protein family (Pfam)
PF03188
Domain description: Eukaryotic cytochrome b561
Occurring in:
  1. Transmembrane ascorbate ferrireductase 2
The deposited structure of PDB entry 4o6y contains 2 copies of Pfam domain PF03188 (Eukaryotic cytochrome b561) in Transmembrane ascorbate ferrireductase 2. Showing 1 copy in chain B.

InterPro InterPro annotations
IPR006593
Domain description: Cytochrome b561/ferric reductase transmembrane
Occurring in:
  1. Transmembrane ascorbate ferrireductase 2
IPR043205
Domain description: Cytochrome b561/Cytochrome b reductase 1-like
Occurring in:
  1. Transmembrane ascorbate ferrireductase 2

Structure domain

CATH CATH domain
1.20.120.1770
Class: Mainly Alpha
Architecture: Up-down Bundle
Topology: Four Helix Bundle (Hemerythrin (Met), subunit A)
Homology: Four Helix Bundle (Hemerythrin (Met), subunit A)
Occurring in:
  1. Transmembrane ascorbate ferrireductase 2
The deposited structure of PDB entry 4o6y contains 2 copies of CATH domain 1.20.120.1770 (Four Helix Bundle (Hemerythrin (Met), subunit A)) in Transmembrane ascorbate ferrireductase 2. Showing 1 copy in chain B.

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