ID   CCMO_SYNY3              Reviewed;         297 AA.
AC   Q55121;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   03-AUG-2022, entry version 108.
DE   RecName: Full=Carboxysome assembly protein CcmO {ECO:0000305};
DE   AltName: Full=Carbon dioxide concentrating mechanism protein CcmO;
GN   Name=ccmO {ECO:0000305}; OrderedLocusNames=slr0436;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27184 / PCC 6803 / N-1;
RX   PubMed=8590279; DOI=10.1093/dnares/2.4.153;
RA   Kaneko T., Tanaka A., Sato S., Kotani H., Sazuka T., Miyajima N.,
RA   Sugiura M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. I. Sequence features in the 1 Mb region
RT   from map positions 64% to 92% of the genome.";
RL   DNA Res. 2:153-166(1995).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
CC   -!- FUNCTION: Required for formation of the carboxysome, a polyhedral
CC       inclusion where RuBisCO (ribulose bisphosphate carboxylase, rbcL-rbcS)
CC       is sequestered. Required for recruitment of major shell protein CcmK2
CC       to the pre-carboxysome. Suggested to be a carboxysome shell protein.
CC       {ECO:0000250|UniProtKB:P46205}.
CC   -!- SUBUNIT: Homooligomerizes, possibly as a trimer, interacts with CcmK in
CC       the carboxysome. {ECO:0000250|UniProtKB:P46205}.
CC   -!- SUBCELLULAR LOCATION: Carboxysome {ECO:0000250|UniProtKB:P46205}.
CC       Note=This cyanobacterium makes beta-type carboxysomes. {ECO:0000305}.
CC   -!- DOMAIN: Has 2 BMC domains, is thought to trimerize giving a hexamer
CC       that may interact with CcmK proteins in the carboxysome shell.
CC       {ECO:0000250|UniProtKB:P46205}.
CC   -!- SIMILARITY: Belongs to the bacterial microcompartments protein family.
CC       {ECO:0000255|PROSITE-ProRule:PRU01278}.
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DR   EMBL; BA000022; BAA10253.1; -; Genomic_DNA.
DR   PIR; S74335; S74335.
DR   AlphaFoldDB; Q55121; -.
DR   SMR; Q55121; -.
DR   IntAct; Q55121; 2.
DR   STRING; 1148.1001114; -.
DR   PaxDb; Q55121; -.
DR   EnsemblBacteria; BAA10253; BAA10253; BAA10253.
DR   KEGG; syn:slr0436; -.
DR   eggNOG; COG4577; Bacteria.
DR   InParanoid; Q55121; -.
DR   OMA; CTAIVRG; -.
DR   Proteomes; UP000001425; 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; -; 2.
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; 2.
DR   SMART; SM00877; BMC; 2.
DR   SUPFAM; SSF143414; SSF143414; 2.
DR   PROSITE; PS01139; BMC_1; 2.
DR   PROSITE; PS51930; BMC_2; 2.
PE   3: Inferred from homology;
KW   Bacterial microcompartment; Carbon dioxide fixation; Carboxysome;
KW   Photosynthesis; Reference proteome; Repeat.
FT   CHAIN           1..297
FT                   /note="Carboxysome assembly protein CcmO"
FT                   /id="PRO_0000201515"
FT   DOMAIN          32..116
FT                   /note="BMC 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01278"
FT   DOMAIN          138..222
FT                   /note="BMC 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01278"
FT   REGION          1..29
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   297 AA;  32296 MW;  7D40E966C3E314D3 CRC64;
     MPTSPTMTSV PIARSPRPSY QQINQHQPSD SALGLVSTRS FPAIVGTADM MLKSSQVTLV
     GYEKIGSGYC TAVVRGKVAD VRLAVEEGAR TAEQFGQLVS KLVIPRPMPN LQAVFPIGSH
     LVELAQQQRG YSRLSNRSIG LLETRGFPAM VGAADAMLKS ADVQLASYEI IGDGLCTAIV
     RGTVANVAMA IEVGMQEAER IGELHAVMII PRLLEDLEHT LPVATYWLDE NEPLPMLLPN
     QVREKQRQLV ALPELEKAVV PQRQAKPLPL QEKTEAPLVL EKEAEKPIVE VLGPEID