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HAMAP rule MF_01388

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General rule information [?]

Accession MF_01388
Dates 1-JUL-2008 (Created)
27-JUL-2023 (Last updated, Version 10)
Name PSII_PsbX_2
Scope(s) Bacteria
Template(s) P72575 (PSBX_SYNY3); Q9F1R6 (PSBX_THEVB); [ Recover all ]
Triggered by HAMAP; MF_01388 (Get profile general information and statistics)

Propagated annotation [?]

Identifier, protein and gene names [?]

Identifier PSBX
Protein name RecName: Full=Photosystem II reaction center protein X;
Gene name Name=psbX;

Comments [?]

FUNCTIONInvolved in the binding and/or turnover of quinones at the Q(B) site 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.
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; Single-pass membrane protein.
SIMILARITYBelongs to the PsbX family. Type 2 subfamily.

Keywords [?]

Gene Ontology [?]

GO:0015979; Biological process:photosynthesis
GO:0042651; Cellular component:thylakoid membrane

Cross-references [?]

Pfam PF06596; PsbX; 1;
General Transmembrane; -; 1;

Features [?]

Additional information [?]

Size range 55-62 amino acids
Related rules MF_01386
Fusion Nter: None Cter: None
Comments PsbX is not found in Viridiplantae, is found in some but not all other photosynthetic eukaryotes. There are 2 PsbX subfamilies; this one and a shorter one found in some other cyanobacteria. The characterized proteins (Synechocystis, Thermosynechococcus elongatus) belongs to the other subfamily.

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