H
IPR027387

Cytochrome b/b6-like domain superfamily

InterPro entry
Short nameCytb/b6-like_sf
Overlapping entries
 

Description

Cytochrome b/b6
[1, 2]
is an integral membrane protein of approximately 400 amino acid residues that probably has 8 transmembrane segments. In plants and cyanobacteria, cytochrome b6 consists of two subunits encoded by the petB and petD genes. The sequence of petB is colinear with the N-terminal part of mitochondrial cytochrome b, while petD corresponds to the C-terminal part. Cytochrome b/b6 non-covalently binds two haem groups, known as b562 and b566. Four conserved histidine residues are postulated to be the ligands of the iron atoms of these two haem groups
[1, 2]
.

References

1.Evolutionary conservation of protein regions in the protonmotive cytochrome b and their possible roles in redox catalysis. Howell N. J. Mol. Evol. 29, 157-69, (1989). View articlePMID: 2509716

2.Mitochondrial cytochrome b: evolution and structure of the protein. Esposti MD, De Vries S, Crimi M, Ghelli A, Patarnello T, Meyer A. Biochim. Biophys. Acta 1143, 243-71, (1993). View articlePMID: 8329437

Cross References

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