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PSBX_THEVB
ID   PSBX_THEVB              Reviewed;          41 AA.
AC   Q9F1R6; Q8DHE6;
DT   22-JUL-2008, integrated into UniProtKB/Swiss-Prot.
DT   22-JUL-2008, sequence version 2.
DT   03-AUG-2022, entry version 95.
DE   RecName: Full=Photosystem II reaction center X protein;
GN   Name=psbX; OrderedLocusNames=tsr2013;
OS   Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1).
OC   Bacteria; Cyanobacteria; Pseudanabaenales; Thermosynechococcaceae;
OC   Thermosynechococcus.
OX   NCBI_TaxID=197221;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RX   PubMed=11230572; DOI=10.1093/pcp/pce024;
RA   Katoh H., Ikeuchi M.;
RT   "Targeted disruption of psbX and biochemical characterization of
RT   photosystem II complex in the thermophilic cyanobacterium Synechococcus
RT   elongatus.";
RL   Plant Cell Physiol. 42:179-188(2001).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=12240834; DOI=10.1093/dnares/9.4.123;
RA   Nakamura Y., Kaneko T., Sato S., Ikeuchi M., Katoh H., Sasamoto S.,
RA   Watanabe A., Iriguchi M., Kawashima K., Kimura T., Kishida Y., Kiyokawa C.,
RA   Kohara M., Matsumoto M., Matsuno A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takeuchi C., Yamada M., Tabata S.;
RT   "Complete genome structure of the thermophilic cyanobacterium
RT   Thermosynechococcus elongatus BP-1.";
RL   DNA Res. 9:123-130(2002).
RN   [3]
RP   PROTEIN SEQUENCE OF 2-14, COFACTOR, AND SUBCELLULAR LOCATION.
RX   PubMed=17935689; DOI=10.1016/j.bbabio.2007.08.008;
RA   Kashino Y., Takahashi T., Inoue-Kashino N., Ban A., Ikeda Y., Satoh K.,
RA   Sugiura M.;
RT   "Ycf12 is a core subunit in the photosystem II complex.";
RL   Biochim. Biophys. Acta 1767:1269-1275(2007).
RN   [4]
RP   PROTEIN SEQUENCE OF 2-9, COFACTOR, AND SUBCELLULAR LOCATION.
RX   PubMed=17967798; DOI=10.1093/pcp/pcm148;
RA   Iwai M., Suzuki T., Dohmae N., Inoue Y., Ikeuchi M.;
RT   "Absence of the PsbZ subunit prevents association of PsbK and Ycf12 with
RT   the PSII complex in the thermophilic cyanobacterium Thermosynechococcus
RT   elongatus BP-1.";
RL   Plant Cell Physiol. 48:1758-1763(2007).
RN   [5]
RP   X-RAY CRYSTALLOGRAPHY (3.5 ANGSTROMS) OF 2-41 IN PHOTOSYSTEM II, COFACTOR,
RP   SUBUNIT, AND SUBCELLULAR LOCATION.
RX   PubMed=14764885; DOI=10.1126/science.1093087;
RA   Ferreira K.N., Iverson T.M., Maghlaoui K., Barber J., Iwata S.;
RT   "Architecture of the photosynthetic oxygen-evolving center.";
RL   Science 303:1831-1838(2004).
RN   [6]
RP   X-RAY CRYSTALLOGRAPHY (2.90 ANGSTROMS) OF 2-41 IN PHOTOSYSTEM II, COFACTOR,
RP   SUBUNIT, SUBCELLULAR LOCATION, MASS SPECTROMETRY, AND TOPOLOGY.
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=19219048; DOI=10.1038/nsmb.1559;
RA   Guskov A., Kern J., Gabdulkhakov A., Broser M., Zouni A., Saenger W.;
RT   "Cyanobacterial photosystem II at 2.9-A resolution and the role of
RT   quinones, lipids, channels and chloride.";
RL   Nat. Struct. Mol. Biol. 16:334-342(2009).
RN   [7]
RP   X-RAY CRYSTALLOGRAPHY (3.60 ANGSTROMS) OF 2-41 IN PHOTOSYSTEM II, FUNCTION,
RP   COFACTOR, SUBUNIT, SUBCELLULAR LOCATION, AND MASS SPECTROMETRY.
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=20558739; DOI=10.1074/jbc.m110.127589;
RA   Broser M., Gabdulkhakov A., Kern J., Guskov A., Muh F., Saenger W.,
RA   Zouni A.;
RT   "Crystal structure of monomeric photosystem II from Thermosynechococcus
RT   elongatus at 3.6 A resolution.";
RL   J. Biol. Chem. 285:26255-26262(2010).
RN   [8]
RP   X-RAY CRYSTALLOGRAPHY (3.20 ANGSTROMS) IN PHOTOSYSTEM II, FUNCTION,
RP   COFACTOR, SUBUNIT, AND SUBCELLULAR LOCATION.
RX   PubMed=21367867; DOI=10.1074/jbc.m110.215970;
RA   Broser M., Glockner C., Gabdulkhakov A., Guskov A., Buchta J., Kern J.,
RA   Muh F., Dau H., Saenger W., Zouni A.;
RT   "Structural basis of cyanobacterial photosystem II inhibition by the
RT   herbicide terbutryn.";
RL   J. Biol. Chem. 286:15964-15972(2011).
RN   [9]
RP   X-RAY CRYSTALLOGRAPHY (6.56 ANGSTROMS) OF 2-41 IN PHOTOSYSTEM II, COFACTOR,
RP   SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=22665786; DOI=10.1073/pnas.1204598109;
RA   Kern J., Alonso-Mori R., Hellmich J., Tran R., Hattne J., Laksmono H.,
RA   Glockner C., Echols N., Sierra R.G., Sellberg J., Lassalle-Kaiser B.,
RA   Gildea R.J., Glatzel P., Grosse-Kunstleve R.W., Latimer M.J., McQueen T.A.,
RA   DiFiore D., Fry A.R., Messerschmidt M., Miahnahri A., Schafer D.W.,
RA   Seibert M.M., Sokaras D., Weng T.C., Zwart P.H., White W.E., Adams P.D.,
RA   Bogan M.J., Boutet S., Williams G.J., Messinger J., Sauter N.K., Zouni A.,
RA   Bergmann U., Yano J., Yachandra V.K.;
RT   "Room temperature femtosecond X-ray diffraction of photosystem II
RT   microcrystals.";
RL   Proc. Natl. Acad. Sci. U.S.A. 109:9721-9726(2012).
RN   [10]
RP   X-RAY CRYSTALLOGRAPHY (5.70 ANGSTROMS) IN PHOTOSYSTEM II, COFACTOR,
RP   SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=23413188; DOI=10.1126/science.1234273;
RA   Kern J., Alonso-Mori R., Tran R., Hattne J., Gildea R.J., Echols N.,
RA   Glockner C., Hellmich J., Laksmono H., Sierra R.G., Lassalle-Kaiser B.,
RA   Koroidov S., Lampe A., Han G., Gul S., Difiore D., Milathianaki D.,
RA   Fry A.R., Miahnahri A., Schafer D.W., Messerschmidt M., Seibert M.M.,
RA   Koglin J.E., Sokaras D., Weng T.C., Sellberg J., Latimer M.J.,
RA   Grosse-Kunstleve R.W., Zwart P.H., White W.E., Glatzel P., Adams P.D.,
RA   Bogan M.J., Williams G.J., Boutet S., Messinger J., Zouni A., Sauter N.K.,
RA   Yachandra V.K., Bergmann U., Yano J.;
RT   "Simultaneous femtosecond X-ray spectroscopy and diffraction of photosystem
RT   II at room temperature.";
RL   Science 340:491-495(2013).
RN   [11]
RP   X-RAY CRYSTALLOGRAPHY (5.00 ANGSTROMS) OF 2-40 IN PHOTOSYSTEM II, COFACTOR,
RP   SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=25043005; DOI=10.1038/nature13453;
RA   Kupitz C., Basu S., Grotjohann I., Fromme R., Zatsepin N.A., Rendek K.N.,
RA   Hunter M.S., Shoeman R.L., White T.A., Wang D., James D., Yang J.H.,
RA   Cobb D.E., Reeder B., Sierra R.G., Liu H., Barty A., Aquila A.L.,
RA   Deponte D., Kirian R.A., Bari S., Bergkamp J.J., Beyerlein K.R.,
RA   Bogan M.J., Caleman C., Chao T.C., Conrad C.E., Davis K.M.,
RA   Fleckenstein H., Galli L., Hau-Riege S.P., Kassemeyer S., Laksmono H.,
RA   Liang M., Lomb L., Marchesini S., Martin A.V., Messerschmidt M.,
RA   Milathianaki D., Nass K., Ros A., Roy-Chowdhury S., Schmidt K., Seibert M.,
RA   Steinbrener J., Stellato F., Yan L., Yoon C., Moore T.A., Moore A.L.,
RA   Pushkar Y., Williams G.J., Boutet S., Doak R.B., Weierstall U., Frank M.,
RA   Chapman H.N., Spence J.C., Fromme P.;
RT   "Serial time-resolved crystallography of photosystem II using a femtosecond
RT   X-ray laser.";
RL   Nature 513:261-265(2014).
RN   [12]
RP   X-RAY CRYSTALLOGRAPHY (4.50 ANGSTROMS) IN PHOTOSYSTEM II, FUNCTION,
RP   COFACTOR, SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=NIES-2133 / IAM M-273 / BP-1;
RX   PubMed=25006873; DOI=10.1038/ncomms5371;
RA   Kern J., Tran R., Alonso-Mori R., Koroidov S., Echols N., Hattne J.,
RA   Ibrahim M., Gul S., Laksmono H., Sierra R.G., Gildea R.J., Han G.,
RA   Hellmich J., Lassalle-Kaiser B., Chatterjee R., Brewster A.S., Stan C.A.,
RA   Gloeckner C., Lampe A., DiFiore D., Milathianaki D., Fry A.R.,
RA   Seibert M.M., Koglin J.E., Gallo E., Uhlig J., Sokaras D., Weng T.C.,
RA   Zwart P.H., Skinner D.E., Bogan M.J., Messerschmidt M., Glatzel P.,
RA   Williams G.J., Boutet S., Adams P.D., Zouni A., Messinger J., Sauter N.K.,
RA   Bergmann U., Yano J., Yachandra V.K.;
RT   "Taking snapshots of photosynthetic water oxidation using femtosecond X-ray
RT   diffraction and spectroscopy.";
RL   Nat. Commun. 5:4371-4371(2014).
CC   -!- FUNCTION: Involved in the binding and/or turnover of quinones at the
CC       Q(B) site of Photosystem II. PSII is a light-driven water plastoquinone
CC       oxidoreductase, using light energy to abstract electrons from H(2)O,
CC       generating a proton gradient subsequently used for ATP formation.
CC       {ECO:0000269|PubMed:11230572, ECO:0000269|PubMed:20558739,
CC       ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:25006873}.
CC   -!- COFACTOR:
CC       Note=PSII binds multiple chlorophylls, carotenoids and specific lipids.
CC       {ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:17935689,
CC       ECO:0000269|PubMed:17967798, ECO:0000269|PubMed:19219048,
CC       ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867,
CC       ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188,
CC       ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005};
CC   -!- SUBUNIT: Cyanobacterial PSII is composed of 1 copy each of membrane
CC       proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK,
CC       PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, 3 peripheral proteins PsbO,
CC       PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.
CC       {ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:19219048,
CC       ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867,
CC       ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188,
CC       ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000269|PubMed:14764885, ECO:0000269|PubMed:17935689,
CC       ECO:0000269|PubMed:17967798, ECO:0000269|PubMed:19219048,
CC       ECO:0000269|PubMed:20558739, ECO:0000269|PubMed:21367867,
CC       ECO:0000269|PubMed:22665786, ECO:0000269|PubMed:23413188,
CC       ECO:0000269|PubMed:25006873, ECO:0000269|PubMed:25043005}; Single-pass
CC       membrane protein {ECO:0000269|PubMed:14764885,
CC       ECO:0000269|PubMed:17935689, ECO:0000269|PubMed:17967798,
CC       ECO:0000269|PubMed:19219048, ECO:0000269|PubMed:20558739,
CC       ECO:0000269|PubMed:21367867, ECO:0000269|PubMed:22665786,
CC       ECO:0000269|PubMed:23413188, ECO:0000269|PubMed:25006873,
CC       ECO:0000269|PubMed:25043005}.
CC   -!- MASS SPECTROMETRY: Mass=4192; Mass_error=4; Method=MALDI; Note=Authors
CC       suggest the N-terminus may result from processing of a signal peptide.;
CC       Evidence={ECO:0000269|PubMed:19219048};
CC   -!- MASS SPECTROMETRY: Mass=4190; Method=MALDI; Note=Authors suggest the N-
CC       terminus may result from processing of a signal peptide.;
CC       Evidence={ECO:0000269|PubMed:20558739};
CC   -!- SIMILARITY: Belongs to the PsbX family. Type 1 subfamily.
CC       {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAB16114.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
CC       Sequence=BAC09565.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
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DR   EMBL; AB046708; BAB16114.1; ALT_INIT; Genomic_DNA.
DR   EMBL; BA000039; BAC09565.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; NP_682803.1; NC_004113.1.
DR   PDB; 1S5L; X-ray; 3.50 A; X/x=2-41.
DR   PDB; 3KZI; X-ray; 3.60 A; X=2-41.
DR   PDB; 4FBY; X-ray; 6.56 A; X/j=2-41.
DR   PDB; 4IXQ; X-ray; 5.70 A; X/x=1-41.
DR   PDB; 4IXR; X-ray; 5.90 A; X/x=1-41.
DR   PDB; 4PBU; X-ray; 5.00 A; X/x=2-40.
DR   PDB; 4PJ0; X-ray; 2.44 A; X/x=1-41.
DR   PDB; 4RVY; X-ray; 5.50 A; X/x=2-40.
DR   PDB; 4TNH; X-ray; 4.90 A; X/x=1-41.
DR   PDB; 4TNI; X-ray; 4.60 A; X/x=1-41.
DR   PDB; 4TNJ; X-ray; 4.50 A; X/x=1-41.
DR   PDB; 4TNK; X-ray; 5.20 A; X/x=1-41.
DR   PDB; 4V62; X-ray; 2.90 A; AX/BX=2-41.
DR   PDB; 4V82; X-ray; 3.20 A; AX/BX=1-41.
DR   PDB; 5E79; X-ray; 3.50 A; X/x=2-40.
DR   PDB; 5E7C; X-ray; 4.50 A; X/x=2-40.
DR   PDB; 5H2F; X-ray; 2.20 A; X/x=2-38.
DR   PDB; 5KAF; X-ray; 3.00 A; X/x=1-41.
DR   PDB; 5KAI; X-ray; 2.80 A; X/x=1-41.
DR   PDB; 5MX2; X-ray; 2.20 A; X/x=1-41.
DR   PDB; 5TIS; X-ray; 2.25 A; X/x=1-41.
DR   PDB; 5ZZN; X-ray; 2.10 A; X/x=2-40.
DR   PDB; 6DHE; X-ray; 2.05 A; X/x=2-39.
DR   PDB; 6DHF; X-ray; 2.08 A; X/x=2-39.
DR   PDB; 6DHG; X-ray; 2.50 A; X/x=2-39.
DR   PDB; 6DHH; X-ray; 2.20 A; X/x=2-39.
DR   PDB; 6DHO; X-ray; 2.07 A; X/x=2-39.
DR   PDB; 6DHP; X-ray; 2.04 A; X/x=2-39.
DR   PDB; 6W1O; X-ray; 2.08 A; X/x=1-41.
DR   PDB; 6W1P; X-ray; 2.26 A; X/x=1-41.
DR   PDB; 6W1Q; X-ray; 2.27 A; X/x=1-41.
DR   PDB; 6W1R; X-ray; 2.23 A; X/x=1-41.
DR   PDB; 6W1T; X-ray; 2.01 A; X/x=1-41.
DR   PDB; 6W1U; X-ray; 2.09 A; X/x=1-41.
DR   PDB; 6W1V; X-ray; 2.09 A; X/x=1-41.
DR   PDB; 7NHO; EM; 2.66 A; X=1-41.
DR   PDB; 7NHP; EM; 2.72 A; X=1-41.
DR   PDB; 7NHQ; EM; 2.68 A; X=1-41.
DR   PDB; 7RF1; X-ray; 1.89 A; X/x=1-41.
DR   PDB; 7RF2; X-ray; 2.08 A; X/x=1-41.
DR   PDB; 7RF3; X-ray; 2.26 A; X/x=1-41.
DR   PDB; 7RF4; X-ray; 2.27 A; X/x=1-41.
DR   PDB; 7RF5; X-ray; 2.23 A; X/x=1-41.
DR   PDB; 7RF6; X-ray; 2.01 A; X/x=1-41.
DR   PDB; 7RF7; X-ray; 2.09 A; X/x=1-41.
DR   PDB; 7RF8; X-ray; 2.09 A; X/x=1-41.
DR   PDBsum; 1S5L; -.
DR   PDBsum; 3KZI; -.
DR   PDBsum; 4FBY; -.
DR   PDBsum; 4IXQ; -.
DR   PDBsum; 4IXR; -.
DR   PDBsum; 4PBU; -.
DR   PDBsum; 4PJ0; -.
DR   PDBsum; 4RVY; -.
DR   PDBsum; 4TNH; -.
DR   PDBsum; 4TNI; -.
DR   PDBsum; 4TNJ; -.
DR   PDBsum; 4TNK; -.
DR   PDBsum; 4V62; -.
DR   PDBsum; 4V82; -.
DR   PDBsum; 5E79; -.
DR   PDBsum; 5E7C; -.
DR   PDBsum; 5H2F; -.
DR   PDBsum; 5KAF; -.
DR   PDBsum; 5KAI; -.
DR   PDBsum; 5MX2; -.
DR   PDBsum; 5TIS; -.
DR   PDBsum; 5ZZN; -.
DR   PDBsum; 6DHE; -.
DR   PDBsum; 6DHF; -.
DR   PDBsum; 6DHG; -.
DR   PDBsum; 6DHH; -.
DR   PDBsum; 6DHO; -.
DR   PDBsum; 6DHP; -.
DR   PDBsum; 6W1O; -.
DR   PDBsum; 6W1P; -.
DR   PDBsum; 6W1Q; -.
DR   PDBsum; 6W1R; -.
DR   PDBsum; 6W1T; -.
DR   PDBsum; 6W1U; -.
DR   PDBsum; 6W1V; -.
DR   PDBsum; 7NHO; -.
DR   PDBsum; 7NHP; -.
DR   PDBsum; 7NHQ; -.
DR   PDBsum; 7RF1; -.
DR   PDBsum; 7RF2; -.
DR   PDBsum; 7RF3; -.
DR   PDBsum; 7RF4; -.
DR   PDBsum; 7RF5; -.
DR   PDBsum; 7RF6; -.
DR   PDBsum; 7RF7; -.
DR   PDBsum; 7RF8; -.
DR   AlphaFoldDB; Q9F1R6; -.
DR   SMR; Q9F1R6; -.
DR   DIP; DIP-48503N; -.
DR   IntAct; Q9F1R6; 1.
DR   STRING; 197221.22295739; -.
DR   EnsemblBacteria; BAC09565; BAC09565; BAC09565.
DR   KEGG; tel:tsr2013; -.
DR   PATRIC; fig|197221.4.peg.2106; -.
DR   EvolutionaryTrace; Q9F1R6; -.
DR   Proteomes; UP000000440; 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   1: Evidence at protein level;
KW   3D-structure; Direct protein sequencing; Membrane; Photosynthesis;
KW   Photosystem II; Reference proteome; Thylakoid; Transmembrane;
KW   Transmembrane helix.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:17935689,
FT                   ECO:0000269|PubMed:17967798"
FT   CHAIN           2..41
FT                   /note="Photosystem II reaction center X protein"
FT                   /id="PRO_0000345378"
FT   TOPO_DOM        2..12
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000269|PubMed:19219048"
FT   TRANSMEM        13..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000269|PubMed:19219048"
FT   TOPO_DOM        28..41
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000269|PubMed:19219048"
FT   HELIX           5..34
FT                   /evidence="ECO:0007829|PDB:5ZZN"
SQ   SEQUENCE   41 AA;  4319 MW;  1DDD01F2CC391048 CRC64;
     MTITPSLKGF FIGLLSGAVV LGLTFAVLIA ISQIDKVQRS L
 
 
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