HAMAP rule MF_00589
General rule information
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Accession | MF_00589 |
Dates | 28-OCT-2002 (Created)
31-JUL-2023 (Last updated, Version 26) |
Name | PSII_PsbU |
Scope(s) |
Bacteria Cyanobacteriota |
Template(s) | Q55332 (PSBU_SYNY3); Q9F1L5 (PSBU_THEVB); [ Recover all ] |
Triggered by |
HAMAP; MF_00589 (Get profile general information and statistics) |
Propagated annotation
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Identifier, protein and gene names
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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
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FUNCTION | One 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. |
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, Psb30/Ycf12, peripheral proteins PsbO, CyanoQ (PsbQ), PsbU, PsbV and a large number of cofactors. It forms dimeric complexes. |
SUBCELLULAR LOCATION | Cellular thylakoid membrane; Peripheral membrane protein; Lumenal side. |
SIMILARITY | Belongs to the PsbU family. |
Keywords
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Gene Ontology
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GO:0015979; Biological process:photosynthesis |
GO:0042651; Cellular component:thylakoid membrane |
Cross-references
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Features
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Additional information
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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. |