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HAMAP rule MF_00589

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General rule information [?]

PURL https://purl.expasy.org/hamap/rule/MF_00589
Accession MF_00589
Dates 28-FEB-2005 (Created)
31-JUL-2023 (Last updated, Version 23)
Name PSII_PsbU
Scope(s) Bacteria
Cyanobacteriota
Template(s) Q55332; Q9F1L5; [ Recover all ]
Triggered by HAMAP; MF_00589 (Get profile general information and statistics)

Propagated annotation [?]

Identifier, protein and gene names [?]

Identifier PSBU
Protein name RecName: Full=Photosystem II extrinsic protein U;
                 Short=PSII-U;
                 Short=PsbU;
AltName: Full=Photosystem II 12 kDa extrinsic protein;
                 Short=PS II complex 12 kDa extrinsic protein;
                 Flags: Precursor;
Gene name Name=psbU;

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.
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.
SIMILARITYBelongs to the PsbU family.

Keywords [?]

Electron transport
Membrane
Photosynthesis
Photosystem II
Thylakoid
Transport

Gene Ontology [?]

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

Cross-references [?]

Pfam PF06514; PsbU; 1;
General Signal; -; 1;

Features [?]


Additional information [?]

Size range 120-143 amino acids
Related rules None
Fusion Nter: None Cter: None
Comments GLOVI is very divergent, and hence atypical. For a review on the composition of the oxygen-evolving complex 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). PsbU is found in some non-Viridiplantae algae, but the protein is not detected by this rule.



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