HAMAP rule MF_01386
General rule information
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| Accession | MF_01386 |
| Dates | 26-JUN-2008 (Created)
27-JUL-2023 (Last updated, Version 12) |
| Name | PSII_PsbX_1 |
| Scope(s) |
Bacteria Cyanobacteriota Plastid |
| Template(s) | P72575 (PSBX_SYNY3); Q9F1R6 (PSBX_THEVB); [ Recover all ] |
| Triggered by |
HAMAP; MF_01386 (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. |
| case <OC:Cyanobacteriota> | |
| 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. |
| else | |
| 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, at least 3 peripheral proteins of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes. |
| end case | |
| case <OG:Chloroplast> | |
| SUBCELLULAR LOCATION | Plastid, chloroplast thylakoid membrane; Single- pass membrane protein. |
| else case <OC:Gloeobacter> | |
| SUBCELLULAR LOCATION | Cell inner membrane; Single-pass membrane protein. |
| else | |
| SUBCELLULAR LOCATION | Cellular thylakoid membrane; Single-pass membrane protein. |
| end case | |
| SIMILARITY | Belongs to the PsbX family. Type 1 subfamily. |
Keywords
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| Membrane | |
| Photosynthesis | |
| Photosystem II | |
| case <OC:Gloeobacter> | |
| Cell membrane | |
| Cell inner membrane | |
| else | |
| Thylakoid | |
| end case | |
| Transmembrane | |
| Transmembrane helix | |
Gene Ontology
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| GO:0015979; Biological process:photosynthesis | |
| 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
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| Pfam | PF06596; PsbX; 1; |
| General | Transmembrane; -; 1; |
Features
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Additional information
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| Size range | 36-41 amino acids |
| Related rules |
MF_01388 |
| 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 longer one found in most but not all Prochlorococcus. |