ID   PSBU_NEOYE              Reviewed;         152 AA.
AC   C0HJG3;
DT   15-FEB-2017, integrated into UniProtKB/Swiss-Prot.
DT   15-FEB-2017, sequence version 1.
DT   25-MAY-2022, entry version 7.
DE   RecName: Full=Photosystem II 12 kDa extrinsic protein, chloroplastic {ECO:0000250|UniProtKB:Q9ZQS5};
DE   AltName: Full=PS II complex 12 kDa extrinsic protein {ECO:0000250|UniProtKB:Q9ZQS5};
DE   AltName: Full=Protein PYP2 {ECO:0000303|PubMed:25374159};
DE   Flags: Precursor;
GN   Name=psbU {ECO:0000250|UniProtKB:Q9ZQS5};
OS   Neopyropia yezoensis (Susabi-nori) (Pyropia yezoensis).
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Neopyropia.
OX   NCBI_TaxID=2788 {ECO:0000303|PubMed:10907854};
RN   [1] {ECO:0000305}
RP   NUCLEOTIDE SEQUENCE [MRNA] OF 1-148.
RC   TISSUE=Sporophyte {ECO:0000303|Ref.1};
RA   Zhou X.J., Mao Y.X.;
RT   "The research on genes expression pattern of Porphyra yezoensis based on
RT   cDNA microarray.";
RL   Submitted (AUG-2015) to the EMBL/GenBank/DDBJ databases.
RN   [2] {ECO:0000305}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 29-152.
RC   TISSUE=Gametophyte {ECO:0000303|PubMed:10907854};
RX   PubMed=10907854; DOI=10.1093/dnares/7.3.223;
RA   Nikaido I., Asamizu E., Nakajima M., Nakamura Y., Saga N., Tabata S.;
RT   "Generation of 10,154 expressed sequence tags from a leafy gametophyte of a
RT   marine red alga, Porphyra yezoensis.";
RL   DNA Res. 7:223-227(2000).
RN   [3] {ECO:0000305}
RP   PROTEIN SEQUENCE OF 60-69, AND IDENTIFICATION BY MASS SPECTROMETRY.
RX   PubMed=25374159; DOI=10.3892/ijmm.2014.1992;
RA   Choi Y.H., Yamaguchi K., Oda T., Nam T.J.;
RT   "Chemical and mass spectrometry characterization of the red alga Pyropia
RT   yezoensis chemoprotective protein (PYP): protective activity of the N-
RT   terminal fragment of PYP1 against acetaminophen-induced cell death in Chang
RT   liver cells.";
RL   Int. J. Mol. Med. 35:271-276(2015).
CC   -!- FUNCTION: Stabilizes the structure of photosystem II oxygen-evolving
CC       complex (OEC), the ion environment of oxygen evolution and protects the
CC       OEC against heat-induced inactivation (By similarity).
CC       {ECO:0000250|UniProtKB:P56152}.
CC   -!- SUBUNIT: The oxygen-evolving complex in red algae is composed of PsbO
CC       (OEC33), PsbQ', cytochrome c-550 and PsbU.
CC       {ECO:0000250|UniProtKB:Q9ZQS5}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250|UniProtKB:Q9ZQS5}; Peripheral membrane protein
CC       {ECO:0000250|UniProtKB:Q9ZQS5}; Lumenal side
CC       {ECO:0000250|UniProtKB:Q9ZQS5}. Note=Associated with photosystem II at
CC       the lumenal side of the thylakoid membrane.
CC       {ECO:0000250|UniProtKB:Q9ZQS5}.
CC   -!- PTM: Predicted to be translocated into the thylakoid lumen by the Tat
CC       system. {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the PsbU family. {ECO:0000305}.
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DR   EMBL; AV438439; -; NOT_ANNOTATED_CDS; mRNA.
DR   EMBL; DR907360; -; NOT_ANNOTATED_CDS; mRNA.
DR   AlphaFoldDB; C0HJG3; -.
DR   SMR; C0HJG3; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0019898; C:extrinsic component of membrane; IEA:InterPro.
DR   GO; GO:0009654; C:photosystem II oxygen evolving complex; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:InterPro.
DR   GO; GO:0042549; P:photosystem II stabilization; IEA:InterPro.
DR   InterPro; IPR010527; PSII_PsbU.
DR   InterPro; IPR006311; TAT_signal.
DR   Pfam; PF06514; PsbU; 1.
DR   PROSITE; PS51318; TAT; 1.
PE   1: Evidence at protein level;
KW   Chloroplast; Direct protein sequencing; Membrane; Plastid; Thylakoid;
KW   Transit peptide.
FT   TRANSIT         1..35
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000305"
FT   TRANSIT         36..59
FT                   /note="Thylakoid"
FT                   /evidence="ECO:0000250|UniProtKB:Q9ZQS5"
FT   CHAIN           60..152
FT                   /note="Photosystem II 12 kDa extrinsic protein,
FT                   chloroplastic"
FT                   /evidence="ECO:0000305|PubMed:25374159"
FT                   /id="PRO_0000438859"
SQ   SEQUENCE   152 AA;  15777 MW;  0456E57397085676 CRC64;
     MDSTAFVGAA APLRVAAAAR STICMAAADD KPVVSRRAAL TGAAAAALAA VAGSLPALAE
     TEYANVPFLG GSVIIDINNA NVRAYAKYPG MYPTVAGLIA TNGPFETVSD LYKIPGLTDL
     QIATLKKYED KLVALTPTPE YELDKVNNGL YR