cd00284

Cytochrome_b_N

CDD entry
Member databaseCDD
CDD typedomain
Short nameCytochrome_b_N
SetCytochrome_b_N

Description

Cytochrome b (N-terminus)/b6/petB: Cytochrome b is a subunit of cytochrome bc1, an 11-subunit mitochondrial respiratory enzyme. Cytochrome b spans the mitochondrial membrane with 8 transmembrane helices (A-H) in eukaryotes. In plants and cyanobacteria, cytochrome b6 is analogous to eukaryote cytochrome b, containing two chains: helices A-D are encoded by the petB gene and helices E-H are encoded by the petD gene in these organisms. Cytochrome b/b6 contains two bound hemes and two ubiquinol/ubiquinone binding sites. The C-terminal portion of cytochrome b is described in a separate CD.
[2, 1]

References

1.Structures and proton-pumping strategies of mitochondrial respiratory enzymes. Schultz BE, Chan SI. Annu Rev Biophys Biomol Struct 30, 23-65, (2001). PMID: 11340051

2.Structure at 2.3 A resolution of the cytochrome bc(1) complex from the yeast Saccharomyces cerevisiae co-crystallized with an antibody Fv fragment. Hunte C, Koepke J, Lange C, Rossmanith T, Michel H. Structure 8, 669-84, (2000). View articlePMID: 10873857

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