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UniProt functional annotation for P83794 | ||
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| UniProt code: P83794. |
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| Organism: | |
Mastigocladus laminosus (Fischerella sp.). |
| Taxonomy: | |
Bacteria; Cyanobacteria; Nostocales; Hapalosiphonaceae; Mastigocladus. |
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| Function: | |
Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions. {ECO:0000305|PubMed:14526088}. |
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| Catalytic activity: | |
Reaction=a plastoquinol + 2 H(+)(in) + 2 oxidized [plastocyanin] = a plastoquinone + 4 H(+)(out) + 2 reduced [plastocyanin]; Xref=Rhea:RHEA:22148, Rhea:RHEA-COMP:9561, Rhea:RHEA-COMP:9562, Rhea:RHEA-COMP:10039, Rhea:RHEA-COMP:10040, ChEBI:CHEBI:15378, ChEBI:CHEBI:17757, ChEBI:CHEBI:29036, ChEBI:CHEBI:49552, ChEBI:CHEBI:62192; EC=7.1.1.6; |
| Cofactor: | |
Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:49601; Evidence={ECO:0000269|PubMed:14526088}; Note=Binds 1 [2Fe-2S] cluster per subunit. {ECO:0000269|PubMed:14526088}; |
| Subunit: | |
The 4 large subunits of the cytochrome b6-f complex are cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and PetN. The complex functions as a dimer. {ECO:0000269|PubMed:14526088}. |
| Subcellular location: | |
Cellular thylakoid membrane {ECO:0000305|PubMed:14526088}; Single-pass membrane protein {ECO:0000269|PubMed:14526088}. Note=The transmembrane helix obliquely spans the membrane in one monomer, and its extrinsic C-terminal domain is part of the other monomer (PubMed:14526088). {ECO:0000269|PubMed:14526088}. |
| Miscellaneous: | |
The Rieske iron-sulfur protein is a high potential 2Fe- 2S protein. |
| Similarity: | |
Belongs to the Rieske iron-sulfur protein family. {ECO:0000255|HAMAP-Rule:MF_01335}. |
Annotations taken from UniProtKB at the EBI.