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| The cytochrome b6f complex contains 4 subunits: Cytf, Cytb6, Rieske iron-sulfur protein and subunit IV. Cytf has an internal chain of water molecules conserved in all its 3D structures. The water chain is assumed to be a proton wire. | | The cytochrome b6f complex contains 4 subunits: Cytf, Cytb6, Rieske iron-sulfur protein and subunit IV. Cytf has an internal chain of water molecules conserved in all its 3D structures. The water chain is assumed to be a proton wire. |
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| <scene name='48/484838/Cv/5'>Heme binding site</scene> in Turnip cytochrome f | | <scene name='48/484838/Cv/9'>Heme binding site</scene> in Turnip cytochrome f |
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| <scene name='48/484838/Cv/6'>Covalent binding of heme to 2 Cys residues</scene> | | <scene name='48/484838/Cv/10'>Covalent binding of heme to 2 Cys residues</scene> |
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| <scene name='48/484838/Cv/7'>Fe coordination site</scene> (PDB entry [[1ctm]]). | | <scene name='48/484838/Cv/11'>Fe coordination site</scene> (PDB entry [[1ctm]]). |
| </StructureSection> | | </StructureSection> |
| ==3D structures of cytochrome f== | | ==3D structures of cytochrome f== |
Revision as of 12:41, 1 February 2016
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Cytochrome f (Cytf) is the largest subunit of the cytochrome b6f complex. This complex transfers electrons from plastocyanin to the two reaction center complexes of oxygenic photosynthetic membranes.[1]
Structural highlights
The cytochrome b6f complex contains 4 subunits: Cytf, Cytb6, Rieske iron-sulfur protein and subunit IV. Cytf has an internal chain of water molecules conserved in all its 3D structures. The water chain is assumed to be a proton wire.
Heme binding site in Turnip cytochrome f
Covalent binding of heme to 2 Cys residues
Fe coordination site (PDB entry 1ctm).
- ↑ Prince RC, George GN. Cytochrome f revealed. Trends Biochem Sci. 1995 Jun;20(6):217-8. PMID:7631417
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3D structures of cytochrome f
Updated on 01-February-2016
{"openlevels":0}
- Cytf
- 1ctm, 1hcz – tCytf – turnip
- 1cfm – CrCytf – Chlamydomonas reinhardtii
- 1e2v, 1e2w, 1e2z – CrCytf (mutant)
- 1ewh - CrCytf soluble domain
- 1ci3 - Cytf soluble domain – Phormidium laminosum
- Cytf complex with plastocyanin
- 2pcf – Cytf soluble domain + plastocyanin – spinach – NMR
- 1tu2 - Cytf soluble domain + plastocyanin – Nostoc – NMR
- 1tkw - tCytf soluble domain + plastocyanin – NMR
- 2jxm - Cytf soluble domain + plastocyanin – Prochlorothrix hollandica – NMR
- Full cytochrome b6f containing Cytf
- 1q90 – CrCytf
- 1vf5, 2e7r - MlCytf – Mastigocladus laminosus
- 2d2c - MlCytf + dibromo-methyl-isopropylbenzoquinone
- 2e75 - MlCytf + nonyl-hydroxyquinoline oxide
- 2e76 - MlCytf + tridecyl-stigmatellin
- 2zt9 - Cytf - Nostoc
References
