HAMAP rule MF_01388
General rule information
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| Accession | MF_01388 |
| Dates | 1-JUL-2008 (Created)
27-JUL-2023 (Last updated, Version 10) |
| Name | PSII_PsbX_2 |
| Scope(s) |
Bacteria Prochloraceae |
| Template(s) | P72575 (PSBX_SYNY3); Q9F1R6 (PSBX_THEVB); [ Recover all ] |
| Triggered by |
HAMAP; MF_01388 (Get profile general information and statistics) |
Propagated annotation
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Identifier, protein and gene names
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| Identifier | PSBX |
| Protein name | RecName: Full=Photosystem II reaction center protein X; |
| Gene name | Name=psbX; |
Comments
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| FUNCTION | Involved 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. |
| 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; Single-pass membrane protein. |
| SIMILARITY | Belongs to the PsbX family. Type 2 subfamily. |
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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| Pfam | PF06596; PsbX; 1; |
| General | Transmembrane; -; 1; |
Features
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Additional information
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| 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. |