ID   PSBX_NEOYE              Reviewed;          39 AA.
AC   Q1XDU0;
DT   06-FEB-2007, integrated into UniProtKB/Swiss-Prot.
DT   02-MAY-2006, sequence version 1.
DT   25-MAY-2022, entry version 40.
DE   RecName: Full=Photosystem II reaction center X protein {ECO:0000255|HAMAP-Rule:MF_01386};
GN   Name=psbX {ECO:0000255|HAMAP-Rule:MF_01386};
OS   Neopyropia yezoensis (Susabi-nori) (Pyropia yezoensis).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Neopyropia.
OX   NCBI_TaxID=2788;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=U-51;
RA   Kunimoto M., Morishima K., Yoshikawa M., Fukuda S., Kobayashi T.,
RA   Kobayashi M., Okazaki T., Ohara I., Nakayama I.;
RT   "Whole genome sequence of Porphyra yezoensis chloroplast.";
RL   Submitted (NOV-2003) to the EMBL/GenBank/DDBJ databases.
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: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01386}; Single-pass membrane protein
CC       {ECO:0000255|HAMAP-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; AP006715; BAE92321.1; -; Genomic_DNA.
DR   RefSeq; YP_536878.1; NC_007932.1.
DR   AlphaFoldDB; Q1XDU0; -.
DR   SMR; Q1XDU0; -.
DR   GeneID; 3978791; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
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: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   Chloroplast; Membrane; Photosynthesis; Photosystem II; Plastid; Thylakoid;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..39
FT                   /note="Photosystem II reaction center X protein"
FT                   /id="PRO_0000277265"
FT   TRANSMEM        11..31
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01386"
SQ   SEQUENCE   39 AA;  4201 MW;  8DC1F1F61B55C8F1 CRC64;
     MTPSLSSFLN SLILGAVIVV VPITLALLFV SQKDRTIRS