ID   CSOS1_PROMA             Reviewed;         103 AA.
AC   P0A328; 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; OrderedLocusNames=Pro_0550;
OS   Prochlorococcus marinus (strain SARG / CCMP1375 / SS120).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=167539;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SARG / CCMP1375 / SS120;
RX   PubMed=12917486; DOI=10.1073/pnas.1733211100;
RA   Dufresne A., Salanoubat M., Partensky F., Artiguenave F., Axmann I.M.,
RA   Barbe V., Duprat S., Galperin M.Y., Koonin E.V., Le Gall F., Makarova K.S.,
RA   Ostrowski M., Oztas S., Robert C., Rogozin I.B., Scanlan D.J.,
RA   Tandeau de Marsac N., Weissenbach J., Wincker P., Wolf Y.I., Hess W.R.;
RT   "Genome sequence of the cyanobacterium Prochlorococcus marinus SS120, a
RT   nearly minimal oxyphototrophic genome.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:10020-10025(2003).
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   -!- 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; AE017126; AAP99595.1; -; Genomic_DNA.
DR   RefSeq; NP_874943.1; NC_005042.1.
DR   RefSeq; WP_006169870.1; NC_005042.1.
DR   AlphaFoldDB; P0A328; -.
DR   SMR; P0A328; -.
DR   STRING; 167539.Pro_0550; -.
DR   EnsemblBacteria; AAP99595; AAP99595; Pro_0550.
DR   GeneID; 54199917; -.
DR   KEGG; pma:Pro_0550; -.
DR   PATRIC; fig|167539.5.peg.565; -.
DR   eggNOG; COG4577; Bacteria.
DR   HOGENOM; CLU_064903_5_3_3; -.
DR   OMA; QFREGVN; -.
DR   OrthoDB; 1802372at2; -.
DR   Proteomes; UP000001420; 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   3: Inferred from homology;
KW   Bacterial microcompartment; Carbon dioxide fixation; Carboxysome;
KW   Photosynthesis; Reference proteome.
FT   CHAIN           1..103
FT                   /note="Carboxysome shell protein CsoS1"
FT                   /id="PRO_0000201499"
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