UniProt functional annotation for Q9F1R6



	UniProt functional annotation for Q9F1R6

UniProt codes: Q9F1R6, Q8DHE6.

Organism: Thermosynechococcus elongatus (strain BP-1).

Taxonomy: Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Thermosynechococcus.

Function: Involved in the binding and/or turnover of quinones at the Q(B) site of Photosystem II. 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. {ECO:0000269|PubMed:11230572, ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:25006873}.

Cofactor: Note=PSII binds multiple chlorophylls, carotenoids and specific lipids. {ECO:0000269|PubMed:14764885, 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};

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, 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes. {ECO:0000269|PubMed:14764885, 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:0000269|PubMed:14764885, 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:0000269|PubMed:14764885, 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=4192; Mass_error=4; Method=MALDI; Note=Authors suggest the N-terminus may result from processing of a signal peptide.; Evidence={ECO:0000269|PubMed:19219048};

Mass spectrometry: Mass=4190; Method=MALDI; Note=Authors suggest the N- terminus may result from processing of a signal peptide.; Evidence={ECO:0000269|PubMed:20558739};

Similarity: Belongs to the PsbX family. Type 1 subfamily. {ECO:0000305}.

Sequence caution: Sequence=BAB16114.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305}; Sequence=BAC09565.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};

Annotations taken from UniProtKB at the EBI.


Organism:		Thermosynechococcus elongatus (strain BP-1).
Taxonomy:		Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Thermosynechococcus.



Function:		Involved in the binding and/or turnover of quinones at the Q(B) site of Photosystem II. 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. {ECO:0000269\|PubMed:11230572, ECO:0000269\|PubMed:20558739, ECO:0000269\|PubMed:21367867, ECO:0000269\|PubMed:25006873}.


Cofactor:		Note=PSII binds multiple chlorophylls, carotenoids and specific lipids. {ECO:0000269\|PubMed:14764885, 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};
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, 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes. {ECO:0000269\|PubMed:14764885, 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:0000269\|PubMed:14764885, 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:0000269\|PubMed:14764885, 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=4192; Mass_error=4; Method=MALDI; Note=Authors suggest the N-terminus may result from processing of a signal peptide.; Evidence={ECO:0000269\|PubMed:19219048};
Mass spectrometry:		Mass=4190; Method=MALDI; Note=Authors suggest the N- terminus may result from processing of a signal peptide.; Evidence={ECO:0000269\|PubMed:20558739};
Similarity:		Belongs to the PsbX family. Type 1 subfamily. {ECO:0000305}.
Sequence caution:		Sequence=BAB16114.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305}; Sequence=BAC09565.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};