ID   CSOS1_SYNPW             Reviewed;         103 AA.
AC   P0A330; A5GJI8; P96485;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   15-MAR-2005, sequence version 1.
DT   03-AUG-2022, entry version 75.
DE   RecName: Full=Carboxysome shell protein CsoS1 {ECO:0000305};
GN   Name=csoS1; Synonyms=ccmK {ECO:0000303|PubMed:9002609};
GN   OrderedLocusNames=SynWH7803_0677;
OS   Synechococcus sp. (strain WH7803).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC   unclassified Synechococcus.
OX   NCBI_TaxID=32051;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], INDUCTION, AND OPERON STRUCTURE.
RC   STRAIN=WH7803;
RX   PubMed=9002609; DOI=10.1007/bf00041394;
RA   Watson G.M., Tabita F.R.;
RT   "Regulation, unique gene organization, and unusual primary structure of
RT   carbon fixation genes from a marine phycoerythrin-containing
RT   cyanobacterium.";
RL   Plant Mol. Biol. 32:1103-1115(1996).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=WH7803;
RG   Genoscope;
RL   Submitted (MAY-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: One of shell proteins of the carboxysome, a polyhedral
CC       inclusion where RuBisCO (ribulose bisphosphate carboxylase, ccbL-ccbS)
CC       is sequestered. Assembles into hexamers which make sheets that form the
CC       facets of the polyhedral carboxysome. {ECO:0000250|UniProtKB:P45689}.
CC   -!- SUBUNIT: Homohexamer with a small central pore. Forms a CsoS2-CsoS1-
CC       RuBisCO complex. {ECO:0000250|UniProtKB:P45689}.
CC   -!- SUBCELLULAR LOCATION: Carboxysome {ECO:0000250|UniProtKB:P45689}.
CC       Note=This bacterium makes alpha-type carboxysomes. {ECO:0000305}.
CC   -!- INDUCTION: Transcribed during light cycle, reaching a peak after 6
CC       hours of illumination, mRNA becomes undetectable during the dark. Part
CC       of the csoS1-ccbL-ccbS operon. {ECO:0000269|PubMed:9002609}.
CC   -!- DOMAIN: The tight homohexamer forms a small pore which is positively
CC       charged. {ECO:0000250|UniProtKB:P45689}.
CC   -!- SIMILARITY: Belongs to the bacterial microcompartments protein family.
CC       CsoS1 subfamily. {ECO:0000305}.
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DR   EMBL; U46156; AAB48079.1; -; Genomic_DNA.
DR   EMBL; CT971583; CAK23103.1; -; Genomic_DNA.
DR   RefSeq; WP_006169870.1; NC_009481.1.
DR   AlphaFoldDB; P0A330; -.
DR   SMR; P0A330; -.
DR   STRING; 32051.SynWH7803_0677; -.
DR   EnsemblBacteria; CAK23103; CAK23103; SynWH7803_0677.
DR   GeneID; 54199917; -.
DR   KEGG; syx:SynWH7803_0677; -.
DR   eggNOG; COG4577; Bacteria.
DR   HOGENOM; CLU_064903_5_3_3; -.
DR   OMA; QFREGVN; -.
DR   OrthoDB; 1802372at2; -.
DR   Proteomes; UP000001566; Chromosome.
DR   GO; GO:0031470; C:carboxysome; IEA:UniProtKB-SubCell.
DR   GO; GO:0043886; F:structural constituent of carboxysome; IEA:UniProt.
DR   GO; GO:0015977; P:carbon fixation; IEA:UniProtKB-KW.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 3.30.70.1710; -; 1.
DR   InterPro; IPR020808; Bact_microcomp_CS.
DR   InterPro; IPR000249; BMC_dom.
DR   InterPro; IPR037233; CcmK-like_sf.
DR   InterPro; IPR044872; CcmK/CsoS1_BMC.
DR   Pfam; PF00936; BMC; 1.
DR   SMART; SM00877; BMC; 1.
DR   SUPFAM; SSF143414; SSF143414; 1.
DR   PROSITE; PS01139; BMC_1; 1.
DR   PROSITE; PS51930; BMC_2; 1.
PE   2: Evidence at transcript level;
KW   Bacterial microcompartment; Carbon dioxide fixation; Carboxysome;
KW   Photosynthesis; Reference proteome.
FT   CHAIN           1..103
FT                   /note="Carboxysome shell protein CsoS1"
FT                   /id="PRO_0000201505"
FT   DOMAIN          9..94
FT                   /note="BMC"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01278"
SQ   SEQUENCE   103 AA;  10584 MW;  BFBF578AB15734E8 CRC64;
     MANETMGIAL GMIETRGLVP AIEAADAMTK AAEVRLIGRE FVGGGYVTVL VRGETGAVNA
     AVRAGADACE RVGDGLVAAH IIARPHREVE PALGNGNFLG QKD