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HAMAP rule MF_01378

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General rule information [?]

Accession MF_01378
Dates 28-JUN-2007 (Created)
2-AUG-2023 (Last updated, Version 31)
Name PSII_Cyt550
Scope(s) Bacteria
Cyanobacteriota
Plastid
Template(s) P0A386 (CY550_THEVB); Q55013 (CY550_SYNY3); Q76FB0 (C550B_CYACA); [ Recover all ]
Triggered by HAMAP; MF_01378 (Get profile general information and statistics)

Propagated annotation [?]

Identifier, protein and gene names [?]

Identifier CY550
case <OC:Cyanobacteriota>
Protein name RecName: Full=Photosystem II extrinsic protein V;
                 Short=PsbV;
AltName: Full=Cytochrome c-550;
AltName: Full=Cytochrome c550;
AltName: Full=Low-potential cytochrome c;
                 Flags: Precursor;
else case <OG:Chloroplast>
Protein name RecName: Full=Photosystem II extrinsic protein V;
                 Short=PsbV;
AltName: Full=Cytochrome c-550;
AltName: Full=Cytochrome c550;
                 Flags: Precursor;
end case
Gene name Name=psbV;

Comments [?]

FUNCTIONOne of the extrinsic, lumenal subunits of photosystem II (PSII). PSII is a light-driven water plastoquinone oxidoreductase, using light energy to abstract electrons from H(2)O, generating a proton gradient subsequently used for ATP formation. The extrinsic proteins stabilize the structure of photosystem II oxygen-evolving complex (OEC), the ion environment of oxygen evolution and protect the OEC against heat-induced inactivation. Low-potential cytochrome c that plays a role in the OEC of PSII.
COFACTOR Name=heme c; Xref=ChEBI:CHEBI:61717; Note=Binds 1 heme c group covalently per subunit.;
case <OG:Chloroplast>
SUBUNITPSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbY, PsbZ, Psb30/Ycf12, at least 3 peripheral proteins of the oxygen- evolving complex and a large number of cofactors. It forms dimeric complexes.
SUBCELLULAR LOCATIONPlastid, 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>
SUBUNITPSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.
SUBCELLULAR LOCATIONCell inner membrane; Peripheral membrane protein; Periplasmic side. Note=Associated with photosystem II at the periplasmic side side of the thylakoid membrane.
else
SUBUNITPSII 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, Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.
SUBCELLULAR LOCATIONCellular thylakoid membrane; Peripheral membrane protein; Lumenal side. Note=Associated with photosystem II at the lumenal side of the thylakoid membrane.
end case
SIMILARITYBelongs to the cytochrome c family. PsbV subfamily.

Keywords [?]


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 <OCellular component:Gloeobacter>
GO:0005886; Cellular component:plasma membrane
else; https://www.ebi.ac.uk/QuickGO/term/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;
General Signal; -; 1;

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 Nter: None Cter: 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); other algae may be similar. 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).



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