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Annotation rule MF_01335
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General rule information [?]

Accession MF_01335
Dates 2-JUN-2005 (Created)
12-JAN-2021 (Last updated, Version 38)
Name Cytb6_f_Rieske
Scope
Bacteria; Cyanobacteria
Templates P83794 (UCRI_MASLA); P49728 (UCRIA_CHLRE): [Recover all]
Triggered by

Propagated annotation [?]


Identifier, protein and gene names [?]

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
petC

Comments [?]

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
case <Feature:PS51296>
Cofactor [2Fe-2S] cluster
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 [?]

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
Translocase
Transmembrane
Transport
Transmembrane helix

Gene Ontology [?]

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 [?]

PROSITE PS51296; RIESKE; 1; trigger=PRU00628;
PS51318; TAT; 0-1;
Pfam PF00355; Rieske; 1;
PRINTS PR00162; RIESKE; 1;
TIGRFAMs TIGR01409; TAT_signal_seq; 1;

Computed features [?]

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.


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