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UniProt functional annotation for Q8DHA7 | ||
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| UniProt code: Q8DHA7. |
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| Organism: | |
Thermosynechococcus elongatus (strain BP-1). |
| Taxonomy: | |
Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Thermosynechococcus. |
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| Function: | |
One of the components of the core complex of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. This subunit is found at the monomer-monomer interface. Probably involved in dimerization of PSII; at the monomer-monomer interface the only protein-protein contacts observed are between the 2 PsbM subunits. Lipids, chlorophylls and carotenoids contribute strongly to PSII dimerization. {ECO:0000255|HAMAP-Rule:MF_00438, ECO:0000269|PubMed:19219048, ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21195048, ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:25006873}. |
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| Cofactor: | |
Note=PSII binds multiple chlorophylls, carotenoids and specific lipids. {ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:16355230, ECO:0000269|PubMed:17967798, ECO:0000269|PubMed:19219048, ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188, ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005}; |
| Subunit: | |
Cyanobacterial 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, Ycf12, at least 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes. {ECO:0000255|HAMAP-Rule:MF_00438, ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:16355230, ECO:0000269|PubMed:19219048, ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188, ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005}. |
| Subcellular location: | |
Cellular thylakoid membrane {ECO:0000255|HAMAP- Rule:MF_00438, ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:16355230, ECO:0000269|PubMed:17935689, ECO:0000269|PubMed:17967798, ECO:0000269|PubMed:19219048, ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188, ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005}; Single-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_00438, ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:16355230, ECO:0000269|PubMed:17935689, ECO:0000269|PubMed:17967798, ECO:0000269|PubMed:19219048, ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188, ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005}. |
| Mass spectrometry: | |
Mass=4011; Mass_error=2; Method=MALDI; Evidence={ECO:0000269|PubMed:19219048}; |
| Mass spectrometry: | |
Mass=4009; Method=MALDI; Evidence={ECO:0000269|PubMed:20558739}; |
| Disruption phenotype: | |
Decreased yields of PSII dimers with increased PSII monomers, slightly slower photoautotrophic growth, about 20% less oxygen evolution. Formed PSII dimers are less stable than wild-type. {ECO:0000269|PubMed:21195048}. |
| Similarity: | |
Belongs to the PsbM family. {ECO:0000255|HAMAP- Rule:MF_00438}. |
Annotations taken from UniProtKB at the EBI.