CATH Classification
Level | CATH Code | Description |
---|---|---|
1 | Mainly Alpha | |
1.20 | Up-down Bundle | |
1.20.5 | Single alpha-helices involved in coiled-coils or other helix-helix interfaces | |
1.20.5.700 | Single helix bin |
Domain Context
CATH Clusters
Superfamily | Single helix bin |
Functional Family |
Enzyme Information
7.1.1.6 |
Plastoquinol--plastocyanin reductase.
based on mapping to UniProt P83794
Plastoquinol + 2 oxidized plastocyanin + 2 H(+)(Side 1) = plastoquinone + 2 reduced plastocyanin + 4 H(+)(Side 2).
-!- Contains two b-type cytochromes, two c-type cytochromes (c(n) and f), and a [2Fe-2S] Rieske cluster. -!- The enzyme plays a key role in photosynthesis, transferring electrons from photosystem II (EC 1.10.3.9) to photosystem I (EC 1.97.1.12). -!- Cytochrome c-552 can act as acceptor instead of plastocyanin, but more slowly. -!- In chloroplasts, protons are translocated through the thylakoid membrane from the lumen to the stroma. -!- The mechanism occurs through the Q cycle as in EC 7.1.1.8 (complex III) and involves electron bifurcation. -!- Formerly EC 1.10.9.1 and EC 1.10.99.1.
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UniProtKB Entries (1)
P83793 |
CYF_MASLA
Mastigocladus laminosus
Cytochrome f
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PDB Structure
PDB | 2D2C |
External Links | |
Method | X-RAY DIFFRACTION |
Organism | |
Primary Citation |
Intraprotein transfer of the quinone analogue inhibitor 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone in the cytochrome b6f complex
Proc.Natl.Acad.Sci.USA
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