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Annotation rule MF_01335 |
General rule information
[?]
Accession |
MF_01335 |
Dates |
2-JUN-2005 (Created) 12-JAN-2021 (Last updated, Version 38) |
Scope |
Bacteria; Cyanobacteria |
Propagated annotation
[?]
Identifier, protein and gene names
[?]
Protein name |
RecName:
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Full=Cytochrome b6-f complex iron-sulfur subunit;
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EC 7.1.1.6;
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AltName:
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Full=Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein;
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Short=ISP;
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Short=RISP;
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AltName:
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Full=Rieske iron-sulfur protein;
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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 |
RHEA:22148: a plastoquinol + 2 H(+)(in) + 2 oxidized [plastocyanin] = a plastoquinone + 4 H(+)(out) + 2 reduced [plastocyanin]
EC 7.1.1.6
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case <Feature:PS51296>
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. |
case <Property:Thylakoid>
end case
case not <Property:Thylakoid>
end case
case <Feature:PS51296>
end case
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>
end case
General |
Transmembrane; -; 1; trigger=yes; |
Additional information
[?]
Size range |
172-186 amino acids |
Related rules |
None |
Fusion |
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. |