ID   PSBX2_SYNJA             Reviewed;          38 AA.
AC   Q2JRN5;
DT   22-JUL-2008, integrated into UniProtKB/Swiss-Prot.
DT   07-MAR-2006, sequence version 1.
DT   25-MAY-2022, entry version 73.
DE   RecName: Full=Photosystem II reaction center X protein 2 {ECO:0000255|HAMAP-Rule:MF_01386};
GN   Name=psbX2 {ECO:0000255|HAMAP-Rule:MF_01386}; OrderedLocusNames=CYA_2600;
OS   Synechococcus sp. (strain JA-3-3Ab) (Cyanobacteria bacterium Yellowstone
OS   A-Prime).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC   unclassified Synechococcus.
OX   NCBI_TaxID=321327;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=JA-3-3Ab;
RX   PubMed=18059494; DOI=10.1038/ismej.2007.46;
RA   Bhaya D., Grossman A.R., Steunou A.-S., Khuri N., Cohan F.M., Hamamura N.,
RA   Melendrez M.C., Bateson M.M., Ward D.M., Heidelberg J.F.;
RT   "Population level functional diversity in a microbial community revealed by
RT   comparative genomic and metagenomic analyses.";
RL   ISME J. 1:703-713(2007).
CC   -!- FUNCTION: Involved in the binding and/or turnover of quinones at the
CC       Q(B) site of Photosystem II. {ECO:0000255|HAMAP-Rule:MF_01386}.
CC   -!- SUBUNIT: PSII consists of a core antenna complex that captures photons,
CC       and an electron transfer chain that converts photonic excitation into a
CC       charge separation. PSII forms dimeric complexes. {ECO:0000255|HAMAP-
CC       Rule:MF_01386}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC       Rule:MF_01386}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_01386}.
CC   -!- SIMILARITY: Belongs to the PsbX family. Type 1 subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01386}.
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DR   EMBL; CP000239; ABD00716.1; -; Genomic_DNA.
DR   RefSeq; WP_011431389.1; NC_007775.1.
DR   AlphaFoldDB; Q2JRN5; -.
DR   SMR; Q2JRN5; -.
DR   STRING; 321327.CYA_2600; -.
DR   EnsemblBacteria; ABD00716; ABD00716; CYA_2600.
DR   KEGG; cya:CYA_2600; -.
DR   eggNOG; ENOG5030Y19; Bacteria.
DR   HOGENOM; CLU_212837_0_1_3; -.
DR   OrthoDB; 2082627at2; -.
DR   Proteomes; UP000008818; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_01386; PSII_PsbX_1; 1.
DR   InterPro; IPR009518; PSII_PsbX.
DR   InterPro; IPR023431; PSII_PsbX_type_1_subfam.
DR   Pfam; PF06596; PsbX; 1.
PE   3: Inferred from homology;
KW   Membrane; Photosynthesis; Photosystem II; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..38
FT                   /note="Photosystem II reaction center X protein 2"
FT                   /id="PRO_0000345382"
FT   TRANSMEM        8..28
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01386"
SQ   SEQUENCE   38 AA;  4309 MW;  E3C7A790D7DA54E4 CRC64;
     MTPSLANFLW SLVYGAVVLG LLFGAIVFVS QRDRVRRR