HAMAP rule MF_01335
General rule information
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| Accession | MF_01335 |
| Dates | 2-JUN-2005 (Created)
1-JUN-2023 (Last updated, Version 41) |
| Name | Cytb6_f_Rieske |
| Scope(s) |
Bacteria Cyanobacteriota |
| Template(s) | P83794 (UCRI_MASLA); P49728 (UCRIA_CHLRE); [ Recover all ] |
| Triggered by |
HAMAP; MF_01335 (Get profile general information and statistics) |
Propagated annotation
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Identifier, protein and gene names
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| Identifier | UCRI |
| Protein name | RecName: Full=Cytochrome b6-f complex iron-sulfur subunit; EC=7.1.1.6; AltName: Full=Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein; Short=ISP; Short=RISP; AltName: Full=Rieske iron-sulfur protein; |
| Gene name | Name=petC; |
Comments
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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. |
| 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; |
| case <Feature:PS51296> | |
| COFACTOR | Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135; Note=Binds 1 [2Fe-2S] cluster per subunit.; |
| end case | |
| 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. |
| case <Property:Thylakoid> | |
| SUBCELLULAR LOCATION | Cellular thylakoid membrane; Single-pass membrane protein. Note=The transmembrane helix obliquely spans the membrane in one monomer, and its extrinsic C-terminal domain is part of the other monomer. |
| else case not <Property:Thylakoid> | |
| SUBCELLULAR LOCATION | Cell inner membrane; Single-pass membrane protein. Note=The transmembrane helix obliquely spans the membrane in one monomer, and its extrinsic C-terminal domain is part of the other monomer. |
| end case | |
| case <Feature:PS51296> | |
| MISCELLANEOUS | The Rieske iron-sulfur protein is a high potential 2Fe- 2S protein. |
| end case | |
| SIMILARITY | Belongs to the Rieske iron-sulfur protein family. |
Keywords
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| Electron transport | |
| case <Property:Thylakoid> | |
| Thylakoid | |
| end case | |
| case not <Property:Thylakoid> | |
| Cell membrane | |
| Cell inner membrane | |
| end case | |
| case <Feature:PS51296> | |
| 2Fe-2S | |
| Iron | |
| Iron-sulfur | |
| Metal-binding | |
| end case | |
| Membrane | |
| <a href="https://www.uniprot.org/keywords/KW-1278">Translocase</a> | |
| Transmembrane | |
| Transport | |
| Transmembrane helix | |
Gene Ontology
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| GO:0045158; Molecular function:electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity | |
| GO:0009496; Molecular function:plastoquinol--plastocyanin reductase activity | |
| GO:0015979; Biological process:photosynthesis | |
| case <Property:Thylakoid> | |
| GO:0042651; Cellular component:thylakoid membrane | |
| end case | |
| case not <Property:Thylakoid> | |
| GO:0005886; Cellular component:plasma membrane | |
| end case | |
Cross-references
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| PROSITE | PS51296; RIESKE; 1; |
| PROSITE | PS51318; TAT; 0-1; |
| Pfam | PF00355; Rieske; 1; |
| PRINTS | PR00162; RIESKE; 1; |
| NCBIfam | TIGR01409; TAT_signal_seq; 1; |
| General | Transmembrane; -; 1; |
Features
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Additional information
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| Size range | 172-186 amino acids |
| Related rules |
None |
| Fusion | Nter: None Cter: None |
| Comments | May be translocated into the membrane by the TAT pathway but without signal cleavage. In some cases a TAT signal is not recognized by either the PROSITE or TIGRFAMs predictors. |