ID   PSBO_SYNEL              Reviewed;         272 AA.
AC   P0A432; P55221; Q54074;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   15-MAR-2005, sequence version 1.
DT   25-MAY-2022, entry version 42.
DE   RecName: Full=Photosystem II manganese-stabilizing polypeptide;
DE            Short=MSP;
DE   Flags: Precursor;
GN   Name=psbO;
OS   Synechococcus elongatus.
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus.
OX   NCBI_TaxID=32046;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND PARTIAL PROTEIN SEQUENCE.
RX   PubMed=8448216; DOI=10.1016/0167-4781(93)90232-3;
RA   Miura K., Shimazu T., Motoki A., Kanai S., Hirano M., Katoh S.;
RT   "Nucleotide sequence of the Mn-stabilizing protein gene of the thermophilic
RT   cyanobacterium Synechococcus elongatus.";
RL   Biochim. Biophys. Acta 1172:357-360(1993).
CC   -!- FUNCTION: MSP binds to a putative Mn-binding protein and keeps 2 of the
CC       4 Mn-atoms associated with PSII.
CC   -!- SIMILARITY: Belongs to the PsbO family. {ECO:0000305}.
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DR   EMBL; D12698; BAA02195.1; -; Genomic_DNA.
DR   EMBL; D14438; BAA03321.1; -; Genomic_DNA.
DR   PDB; 5G38; X-ray; 1.15 A; A=45-80, A=90-174, A=219-247, A=257-272.
DR   PDB; 5G39; X-ray; 1.50 A; A=45-80, A=90-174, A=219-247, A=257-272.
DR   PDB; 5G3A; X-ray; 1.22 A; A=45-80, A=90-174, A=219-247.
DR   PDBsum; 5G38; -.
DR   PDBsum; 5G39; -.
DR   PDBsum; 5G3A; -.
DR   AlphaFoldDB; P0A432; -.
DR   SMR; P0A432; -.
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   3D-structure; Direct protein sequencing; Manganese; Photosynthesis;
KW   Photosystem II; Signal.
FT   SIGNAL          1..26
FT   CHAIN           27..272
FT                   /note="Photosystem II manganese-stabilizing polypeptide"
FT                   /id="PRO_0000029568"
FT   STRAND          64..80
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          90..93
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          104..113
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          119..122
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          125..127
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          129..135
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          141..147
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          152..154
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          160..162
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          167..174
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          219..231
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   TURN            232..235
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          236..246
FT                   /evidence="ECO:0007829|PDB:5G38"
FT   STRAND          258..271
FT                   /evidence="ECO:0007829|PDB:5G38"
SQ   SEQUENCE   272 AA;  29608 MW;  1F053A3453990141 CRC64;
     MKYRILMATL LAVCLGIFSL SAPAFAAKQT LTYDDIVGTG LANKCPTLDD TARGAYPIDS
     SQTYRIARLC LQPTTFLVKE EPKNKRQEAE FVPTKLVTRE TTSLDQIQGE LKVNSDGSLT
     FVEEDGIDFQ PVTVQMAGGE RIPLLFTVKN LVASTQPNVT SITTSTDFKG EFNVPSYRTA
     NFLDPKGRGL ASGYDSAIAL PQAKEEELAR ANVKRFSLTK GQISLNVAKV DGRTGEIAGT
     FESEQLSDDD MGAHEPHEVK IQGVFYASIE PA