ID   CMPB_SYNY3              Reviewed;         280 AA.
AC   Q55461;
DT   01-JUL-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 127.
DE   RecName: Full=Bicarbonate transport system permease protein CmpB;
GN   Name=cmpB; OrderedLocusNames=slr0041;
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=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).
RN   [2]
RP   REGULATION BY CMPR.
RX   PubMed=11222586; DOI=10.1128/jb.183.6.1891-1898.2001;
RA   Omata T., Gohta S., Takahashi Y., Harano Y., Maeda S.;
RT   "Involvement of a CbbR homolog in low CO2-induced activation of the
RT   bicarbonate transporter operon in cyanobacteria.";
RL   J. Bacteriol. 183:1891-1898(2001).
CC   -!- FUNCTION: Part of the ABC transporter complex CmpABCD involved in
CC       bicarbonate transport. Probably responsible for the translocation of
CC       the substrate across the membrane (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: The complex is composed of two ATP-binding proteins (CmpC and
CC       CmpD), a transmembrane protein (CmpB) and a solute-binding protein
CC       (CmpA). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000305}; Multi-pass
CC       membrane protein {ECO:0000255|PROSITE-ProRule:PRU00441}.
CC   -!- INDUCTION: By carbon dioxide-limited conditions, probably via CmpR.
CC   -!- SIMILARITY: Belongs to the binding-protein-dependent transport system
CC       permease family. {ECO:0000305}.
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DR   EMBL; BA000022; BAA10804.1; -; Genomic_DNA.
DR   PIR; S75957; S75957.
DR   AlphaFoldDB; Q55461; -.
DR   SMR; Q55461; -.
DR   STRING; 1148.1001317; -.
DR   PaxDb; Q55461; -.
DR   EnsemblBacteria; BAA10804; BAA10804; BAA10804.
DR   KEGG; syn:slr0041; -.
DR   eggNOG; COG0600; Bacteria.
DR   InParanoid; Q55461; -.
DR   OMA; LIEFYRP; -.
DR   PhylomeDB; Q55461; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IBA:GO_Central.
DR   GO; GO:0015112; F:nitrate transmembrane transporter activity; IEA:InterPro.
DR   GO; GO:0022857; F:transmembrane transporter activity; IBA:GO_Central.
DR   CDD; cd06261; TM_PBP2; 1.
DR   Gene3D; 1.10.3720.10; -; 1.
DR   InterPro; IPR000515; MetI-like.
DR   InterPro; IPR035906; MetI-like_sf.
DR   InterPro; IPR005889; NtrB.
DR   Pfam; PF00528; BPD_transp_1; 1.
DR   SUPFAM; SSF161098; SSF161098; 1.
DR   TIGRFAMs; TIGR01183; ntrB; 1.
DR   PROSITE; PS50928; ABC_TM1; 1.
PE   2: Evidence at transcript level;
KW   Cell inner membrane; Cell membrane; Ion transport; Membrane;
KW   Reference proteome; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..280
FT                   /note="Bicarbonate transport system permease protein CmpB"
FT                   /id="PRO_0000341962"
FT   TRANSMEM        32..52
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   TRANSMEM        99..119
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   TRANSMEM        126..146
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   TRANSMEM        153..173
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   TRANSMEM        198..218
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   TRANSMEM        219..239
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   TRANSMEM        251..271
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
FT   DOMAIN          88..266
FT                   /note="ABC transmembrane type-1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00441"
SQ   SEQUENCE   280 AA;  31023 MW;  43EC7FE2BFAC46A0 CRC64;
     MTTTISQRKN RAAGANPLQK FWRKRRGDIL PPIFGILGFL LLWQLISSAG LIKLPPPSSL
     WTDPRTRTLL MYPFYDQGGL DKGLFWQTLA SLGRVAQGYS LAAIVGISTG ILVGTQPLLD
     KALDPIFQFL RMVAPLAWVP IALVALQQNQ PAAIFVIFIT SVWPILINTT EGVKQIPQDY
     INVRKVLRLS PQKFFFKILI PSALPYIFTG LRIAIGLAWL AIIAAEIVMS GIVGIGFFIW
     DAYQQNYISE IILAVFYIGA VGLLLDRGIA YLQKLIAPGQ