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HAMAP rule MF_01378

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General rule information [?]

Accession MF_01378
Dates 28-JUN-2007 (Created)
1-JUN-2023 (Last updated, Version 30)
Name PSII_Cyt550
Scope
Bacteria; Cyanobacteriota
Plastid
Template P0A386 (CY550_THEVB)
Triggered by

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
CY550
case <OC:Cyanobacteriota>
Protein name
RecName: Full=Cytochrome c-550;
AltName: Full=Cytochrome c550;
AltName: Full=Low-potential cytochrome c;
Flags: Precursor;
else case <OG:Chloroplast>
Protein name
RecName: Full=Cytochrome c-550;
AltName: Full=Cytochrome c550;
Flags: Precursor;
end case
Gene name
psbV

Comments [?]

Function Low-potential cytochrome c that plays a role in the oxygen-evolving complex of photosystem II.
Cofactor heme c
Note: Binds 1 heme c group covalently per subunit.
case <OG:Chloroplast>
Subunit Part of the oxygen-evolving complex of photosystem II.
Subcellular location Plastid, chloroplast thylakoid membrane; Peripheral membrane protein; Lumenal side. Note=Associated with photosystem II at the lumenal side of the thylakoid membrane.
else case <OC:Gloeobacter>
Subunit The cyanobacterial oxygen-evolving complex is composed of PsbO, PsbP, PsbQ, PsbV and PsbU.
Subcellular location Cell inner membrane; Peripheral membrane protein; Extracellular side. Note=Associated with photosystem II at the extracellular side of the inner membrane.
else
Subunit The cyanobacterial oxygen-evolving complex is composed of PsbO, PsbP, PsbQ, PsbV and PsbU.
Subcellular location Cellular thylakoid membrane; Peripheral membrane protein; Lumenal side. Note=Associated with photosystem II at the lumenal side of the thylakoid membrane.
end case
Similarity Belongs to the cytochrome c family. PsbV subfamily.

Keywords [?]

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

Gene Ontology [?]

GO:0019684; Biological process: photosynthesis, light reaction.
GO:0018063; Biological process: cytochrome c-heme linkage.
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 [?]

PROSITE PS51007; CYTC; 1;
Pfam PF00034; Cytochrom_C; 1;
NCBIfam TIGR03045; PS_II_C550; 1;

Computed features [?]

General Signal; -; 1; trigger=yes;

Features [?]

From: CY550_THEVB (P0A386)
Key     From     To       Description   Tag   Condition   FTGroup
BINDING     67     67       /ligand="heme c" /ligand_id="ChEBI:CHEBI:61717" /ligand_part="Fe" /ligand_part_id="ChEBI:CHEBI:18248" /note="axial binding residue     H  
BINDING     118     118       /ligand="heme c" /ligand_id="ChEBI:CHEBI:61717" /ligand_part="Fe" /ligand_part_id="ChEBI:CHEBI:18248" /note="axial binding residue     H  
BINDING     63     63       /ligand="heme c" /ligand_id="ChEBI:CHEBI:61717" /note="covalent     C  
BINDING     66     66       /ligand="heme c" /ligand_id="ChEBI:CHEBI:61717" /note="covalent     C  

Additional information [?]

Size range 129-186 amino acids
Related rules None
Fusion None
Comments In land plants cytochrome c-550 and the 12 kDa protein (psbU) are replaced by psbP and psbQ. The oxygen-evolving complex in Cyanidium caldarium is composed of 4 proteins (psbO, psbQ, psbU and cytochrome c- 550); it is not yet known what composes the complex in other algae. For a review see: PubMed=17200881; DOI=10.1007/s11120-006-9117-1; Roose J.L., Wegener K.M., Pakrasi H.B.; "The extrinsic proteins of Photosystem II."; Photosyn. Res. 92:369-387(2007). MICAE and SPIMA have been included in the seed despite being only the mature protein. The second copies (psbV2) and proteins in GLOVI look quite different and perhaps should be a different subfamily.


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