ID   EXBB_HAEDU              Reviewed;         150 AA.
AC   O51808;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-1998, sequence version 1.
DT   25-MAY-2022, entry version 101.
DE   RecName: Full=Biopolymer transport protein ExbB;
GN   Name=exbB; OrderedLocusNames=HD_0329;
OS   Haemophilus ducreyi (strain 35000HP / ATCC 700724).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=233412;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=35000HP / ATCC 700724;
RX   PubMed=9423852; DOI=10.1128/iai.66.1.151-160.1998;
RA   Elkins C., Totten P.A., Olsen B., Thomas C.E.;
RT   "Role of the Haemophilus ducreyi Ton system in internalization of heme from
RT   hemoglobin.";
RL   Infect. Immun. 66:151-160(1998).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=35000HP / ATCC 700724;
RA   Munson R.S. Jr., Ray W.C., Mahairas G., Sabo P., Mungur R., Johnson L.,
RA   Nguyen D., Wang J., Forst C., Hood L.;
RT   "The complete genome sequence of Haemophilus ducreyi.";
RL   Submitted (JUN-2003) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Involved in the TonB-dependent energy-dependent transport of
CC       various receptor-bound substrates. Protects ExbD from proteolytic
CC       degradation and functionally stabilizes TonB (By similarity).
CC       {ECO:0000250}.
CC   -!- SUBUNIT: The accessory proteins ExbB and ExbD seem to form a complex
CC       with TonB. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane; Multi-pass membrane protein.
CC   -!- SIMILARITY: Belongs to the ExbB/TolQ family. {ECO:0000305}.
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DR   EMBL; AF001034; AAC01945.1; -; Genomic_DNA.
DR   EMBL; AE017143; AAP95306.1; -; Genomic_DNA.
DR   RefSeq; WP_010944359.1; NC_002940.2.
DR   AlphaFoldDB; O51808; -.
DR   SMR; O51808; -.
DR   STRING; 233412.HD_0329; -.
DR   EnsemblBacteria; AAP95306; AAP95306; HD_0329.
DR   GeneID; 60733631; -.
DR   KEGG; hdu:HD_0329; -.
DR   eggNOG; COG0811; Bacteria.
DR   HOGENOM; CLU_133317_0_0_6; -.
DR   OMA; WFVIERI; -.
DR   Proteomes; UP000001022; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015031; P:protein transport; IEA:UniProtKB-KW.
DR   GO; GO:0055085; P:transmembrane transport; IEA:InterPro.
DR   InterPro; IPR002898; MotA_ExbB_proton_chnl.
DR   InterPro; IPR014172; TonB_ExbB_2.
DR   Pfam; PF01618; MotA_ExbB; 1.
DR   TIGRFAMs; TIGR02805; exbB2; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Membrane; Protein transport;
KW   Reference proteome; Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..150
FT                   /note="Biopolymer transport protein ExbB"
FT                   /id="PRO_0000145801"
FT   TRANSMEM        12..32
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        66..86
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        105..125
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   150 AA;  16807 MW;  34C2157B25F3591B CRC64;
     MERMLELLQG HVDYIILGIL TLMSIILMWK IIERILFYKQ LNVTSYETIQ ELEIDLTRNL
     TTISTIGANA PYVGLLGTVL GILLTFYHLG HSGGEIDAAS IMVHLSLALK ATAAGILVAI
     PAMMFYSGFN RKVEENKLKW QAIEVRKAKQ