ID   PSBO_HELAN              Reviewed;         324 AA.
AC   P85194;
DT   10-AUG-2010, integrated into UniProtKB/Swiss-Prot.
DT   10-AUG-2010, sequence version 1.
DT   25-MAY-2022, entry version 20.
DE   RecName: Full=Oxygen-evolving enhancer protein 1, chloroplastic {ECO:0000250|UniProtKB:P23321};
DE            Short=OEE1 {ECO:0000250|UniProtKB:P23321};
DE   AltName: Full=33 kDa subunit of oxygen evolving system of photosystem II {ECO:0000250|UniProtKB:P23321};
DE   AltName: Full=33 kDa thylakoid membrane protein {ECO:0000250|UniProtKB:P23321};
DE   AltName: Full=OEC 33 kDa subunit {ECO:0000250|UniProtKB:P23321};
DE   Flags: Precursor;
GN   Name=PSBO {ECO:0000250|UniProtKB:P23321};
OS   Helianthus annuus (Common sunflower).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; campanulids; Asterales; Asteraceae; Asteroideae;
OC   Heliantheae alliance; Heliantheae; Helianthus.
OX   NCBI_TaxID=4232;
RN   [1] {ECO:0000305}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   STRAIN=cv. ANN1312 {ECO:0000269|Ref.1};
RA   Michelmore R.W., Knapp S., Rieseberg L., Bradford K., Kesseli R., Boore J.,
RA   Kozik A., Matvienko M., Lavelle D., Lai Z.;
RT   "Sunflower (Helianthus annuus) ESTs (set 2) from the compositae genome
RT   project http://compgenomics.ucdavis.edu/.";
RL   Submitted (MAR-2006) to the EMBL/GenBank/DDBJ databases.
RN   [2] {ECO:0000305}
RP   IDENTIFICATION BY MASS SPECTROMETRY, AND INDUCTION.
RA   Garcia J.S., Souza G.H.M.F., Eberlin M.N., Arruda M.A.Z.;
RT   "Evaluation of metal-ion stress in sunflower (Heliantus annus L.) leaves
RT   through proteomic changes.";
RL   Metallomics 1:107-113(2009).
CC   -!- FUNCTION: Stabilizes the manganese cluster which is the primary site of
CC       water splitting. {ECO:0000250|UniProtKB:P23321}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000305}. Note=Associated with the photosystem II complex.
CC       {ECO:0000305}.
CC   -!- INDUCTION: Down-regulated in response to mixed metal ion contamination
CC       (cadmium, copper, lead and zinc), but not in response to zinc ion
CC       contamination. {ECO:0000269|Ref.2}.
CC   -!- SIMILARITY: Belongs to the PsbO family. {ECO:0000305}.
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DR   EMBL; DY905981; -; NOT_ANNOTATED_CDS; mRNA.
DR   EMBL; DY911646; -; NOT_ANNOTATED_CDS; mRNA.
DR   AlphaFoldDB; P85194; -.
DR   SMR; P85194; -.
DR   PRIDE; P85194; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009654; C:photosystem II oxygen evolving complex; IEA:InterPro.
DR   GO; GO:0010242; F:oxygen evolving activity; IEA:InterPro.
DR   GO; GO:0010207; P:photosystem II assembly; IEA:InterPro.
DR   GO; GO:0042549; P:photosystem II stabilization; IEA:InterPro.
DR   InterPro; IPR011250; OMP/PagP_b-brl.
DR   InterPro; IPR002628; PSII_MSP.
DR   PANTHER; PTHR34058; PTHR34058; 1.
DR   Pfam; PF01716; MSP; 1.
DR   SUPFAM; SSF56925; SSF56925; 1.
PE   1: Evidence at protein level;
KW   Chloroplast; Manganese; Membrane; Photosynthesis; Photosystem II; Plastid;
KW   Thylakoid; Transit peptide.
FT   TRANSIT         1..50
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000250|UniProtKB:P23321"
FT   TRANSIT         51..77
FT                   /note="Thylakoid"
FT                   /evidence="ECO:0000250|UniProtKB:P23321"
FT   CHAIN           78..324
FT                   /note="Oxygen-evolving enhancer protein 1, chloroplastic"
FT                   /evidence="ECO:0000250|UniProtKB:P23321"
FT                   /id="PRO_0000397229"
FT   CONFLICT        257
FT                   /note="G -> R (in Ref. 1; DY905981)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   324 AA;  34224 MW;  05B8A71A940AF6F0 CRC64;
     MAASLQAAAT FMTPTSRVQL KSSPSICKAF GIESTGSKVS CSLQADLKDF AQKCTDAAKI
     AGFALATSAL VVSGASAEGS PKRLTYDEIQ SKTYMEVKGT GTANQCPTIE GGVNGFAVKP
     GKYNAQKFCL EPTSFTVKAE GISKNSAPEF QKTKLMTRLT YTLDEIEGPL EVSSDGTIKF
     EEKDGIDYAA VTVQLPGGER VPFLFTIKEL VATGKPESFG GNFLVPSYRG SSFLDPKGRG
     GSTGYDNAVA LPAGGRGDEE ELLKENIKNT AAGKGEITFS VTSSKPETGE VIGVFESIQP
     SDTDLGAKAP KDVKIQGVWY AQLW