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Annotation rule MF_00643
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General rule information [?]

Accession MF_00643
Dates 26-MAY-2003 (Created)
18-NOV-2019 (Last updated, Version 41)
Name PSII_PsbF
Scope
Bacteria; Cyanobacteria
Plastid
Templates Q8DIN9 (PSBF_THEEB); P12239 (PSBF_THEVL); P09191 (PSBF_SYNY3): [Recover all]

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
PSBF
Protein name
RecName: Full=Cytochrome b559 subunit beta;
AltName: Full=PSII reaction center subunit VI;
Gene name
psbF

Comments [?]

Function This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.
Cofactor heme b
Note: With its partner (PsbE) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids;
case <OC:Cyanobacteria>
Subunit Heterodimer of an alpha subunit and a beta subunit. Cyanobacterial PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.
else
Subunit Heterodimer of an alpha subunit and a beta subunit. PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral proteins of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes.
end case
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 PsbE/PsbF family.

Keywords [?]

case <OC:Gloeobacter>
else
end case

Gene Ontology [?]

GO:0009055; Molecular function: electron transfer activity.
GO:0005506; Molecular function: iron ion binding.
GO:0015979; Biological process: photosynthesis.
GO:0055114; Biological process: oxidation-reduction process.
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 PF00283; Cytochrom_B559; 1;
PIRSF PIRSF000037; PsbF; 1;
TIGRFAMs TIGR01333; Cyt_b559_beta; 1;
PROSITE PS00537; CYTOCHROME_B559; 1;

Features [?]

From: PSBF_THEVL (P12239)
Key     From     To       Description   Tag   Condition   FTGroup
TRANSMEM     20     36       Helical        
METAL     24     24       Iron (heme axial ligand); shared with alpha subunit     H  

Additional information [?]

Size range 38-51 amino acids
Related rules MF_00642 (PSBE)
Fusion None