ID   PSBS_TOBAC              Reviewed;         274 AA.
AC   Q9SMB4;
DT   29-AUG-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-2000, sequence version 1.
DT   25-MAY-2022, entry version 74.
DE   RecName: Full=Photosystem II 22 kDa protein, chloroplastic;
DE   AltName: Full=CP22;
DE   Flags: Precursor;
GN   Name=PSBS;
OS   Nicotiana tabacum (Common tobacco).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Solanaceae; Nicotianoideae; Nicotianeae;
OC   Nicotiana.
OX   NCBI_TaxID=4097;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. SR1; TISSUE=Leaf;
RA   Kim S., Pichersky E.;
RT   "Nucleotide sequence of a tobacco psbS gene.";
RL   Submitted (JAN-1995) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Seems to be involved in non-photochemical quenching, a
CC       process maintains the balance between dissipation and utilization of
CC       light energy to minimize generation of oxidizing molecules, thereby
CC       protecting the plant against photo-oxidative damage. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Multi-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the ELIP/psbS family. {ECO:0000305}.
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DR   EMBL; X84225; CAA59007.1; -; mRNA.
DR   RefSeq; NP_001312190.1; NM_001325261.1.
DR   AlphaFoldDB; Q9SMB4; -.
DR   SMR; Q9SMB4; -.
DR   STRING; 4097.Q9SMB4; -.
DR   GeneID; 107778533; -.
DR   KEGG; nta:107778533; -.
DR   Proteomes; UP000084051; Unplaced.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IBA:GO_Central.
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-KW.
DR   InterPro; IPR022796; Chloroa_b-bind.
DR   Pfam; PF00504; Chloroa_b-bind; 1.
PE   2: Evidence at transcript level;
KW   Chloroplast; Membrane; Photosynthesis; Photosystem II; Plastid;
KW   Reference proteome; Repeat; Thylakoid; Transit peptide; Transmembrane;
KW   Transmembrane helix.
FT   TRANSIT         1..66
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000255"
FT   CHAIN           67..274
FT                   /note="Photosystem II 22 kDa protein, chloroplastic"
FT                   /id="PRO_0000007809"
FT   TRANSMEM        104..124
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        138..158
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        205..225
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        240..260
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   REPEAT          61..166
FT                   /note="1"
FT   REPEAT          167..274
FT                   /note="2"
SQ   SEQUENCE   274 AA;  29087 MW;  691E103D4C33F282 CRC64;
     MAQTMLLTAN AKVDLRSKES LVERLKPKPL SSFFLPSLPL KYPSASASAS SHFTSTTVAL
     FKSKAKAPAK KVVPKPKEKV EDGIFGTSGG IGFTKQNELF VGRVAMIGFA ASLLGEAITG
     KGILAQLNLE TGIPIYEAEP LLLFFILFNL LGAIGALEDR GKFIDDPAPP TGLDKAVIPP
     GKGFKSALGL SEGGPLFEFT KANELFVGRL AQLGIAFSII GEIITGKGAL AQLNFETGVP
     INEIEPLLLF NIVFFFVAAI NPGTGKFVTD EEEE