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Annotation rule MF_00610
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General rule information [?]

Accession MF_00610
Dates 23-DEC-2002 (Created)
19-JAN-2021 (Last updated, Version 48)
Name Cytb6_f_cytF
Scope
Bacteria; Cyanobacteria
Plastid
Templates P36438 (CYF_BRARR); P23577 (CYF_CHLRE); P83793 (CYF_MASLA): [Recover all]
Triggered by

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
CYF
Protein name
RecName: Full=Cytochrome f;
Flags: Precursor;
Gene name
petA

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.
Cofactor heme
Note: Binds 1 heme group covalently.
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 <OG:Chloroplast>
Subcellular location Plastid, chloroplast thylakoid membrane; Single-pass membrane protein.
else case <OC:Gloeobacter>
Subcellular location Cell inner membrane; Single-pass membrane protein.
else
Subcellular location Cellular thylakoid membrane; Single-pass membrane protein.
end case
Similarity Belongs to the cytochrome f family.

Keywords [?]

Transport
Electron transport
Heme
Iron
Metal-binding
case <OC:Gloeobacter>
Cell membrane
Cell inner membrane
else
Thylakoid
end case
Photosynthesis
Membrane
Transmembrane
Signal
Transmembrane helix

Gene Ontology [?]

GO:0009055; Molecular function: electron transfer activity.
GO:0015979; Biological process: photosynthesis.
case <OG:Chloroplast>
GO:0009535; Cellular component: chloroplast thylakoid membrane.
else case <OC:Gloeobacter>
GO:0005886; Cellular component: plasma membrane.
else
GO:0042651; Cellular component: thylakoid membrane.
end case

Cross-references [?]

Pfam PF01333; Apocytochr_F_C; 1;
PRINTS PR00610; CYTOCHROMEF; 1;
PROSITE PS51010; CYTF; 1;

Computed features [?]

General Signal; -; 1; trigger=yes;
Transmembrane; -; 1; trigger=yes;

Features [?]

From: CYF_BRARR (P36438)
Key     From     To       Description   Tag   Condition   FTGroup
METAL     36     36       Iron (heme axial ligand); via amino nitrogen     [FY]  
METAL     60     60       Iron (heme axial ligand)     H  
BINDING     56     56       Heme; covalent     C  
BINDING     59     59       Heme; covalent     C  

Additional information [?]

Size range 300-342 amino acids
Related rules None
Fusion None
Comments In LEPTE the N-terminus is unusually long, not used in seed alignment or size range. In GLOVI the first conserved heme axial ligand Phe or Tyr is a Trp, the sequence is designated atypical.


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