Member database | CDD |
CDD type | domain |
Short name | Cytochrome_b_N |
Set | Cytochrome_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