ID   EXBB_AQUAE              Reviewed;         148 AA.
AC   O67637;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1998, sequence version 1.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=Biopolymer transport protein ExbB;
GN   Name=exbB; OrderedLocusNames=aq_1757;
OS   Aquifex aeolicus (strain VF5).
OC   Bacteria; Aquificae; Aquificales; Aquificaceae; Aquifex.
OX   NCBI_TaxID=224324;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=VF5;
RX   PubMed=9537320; DOI=10.1038/32831;
RA   Deckert G., Warren P.V., Gaasterland T., Young W.G., Lenox A.L.,
RA   Graham D.E., Overbeek R., Snead M.A., Keller M., Aujay M., Huber R.,
RA   Feldman R.A., Short J.M., Olsen G.J., Swanson R.V.;
RT   "The complete genome of the hyperthermophilic bacterium Aquifex aeolicus.";
RL   Nature 392:353-358(1998).
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 membrane {ECO:0000305}; Multi-pass membrane
CC       protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the ExbB/TolQ family. {ECO:0000305}.
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DR   EMBL; AE000657; AAC07592.1; -; Genomic_DNA.
DR   PIR; C70451; C70451.
DR   RefSeq; NP_214203.1; NC_000918.1.
DR   RefSeq; WP_010881140.1; NC_000918.1.
DR   AlphaFoldDB; O67637; -.
DR   SMR; O67637; -.
DR   STRING; 224324.aq_1757; -.
DR   EnsemblBacteria; AAC07592; AAC07592; aq_1757.
DR   KEGG; aae:aq_1757; -.
DR   PATRIC; fig|224324.8.peg.1355; -.
DR   eggNOG; COG0811; Bacteria.
DR   HOGENOM; CLU_133317_0_0_0; -.
DR   OMA; WFVIERI; -.
DR   OrthoDB; 1796180at2; -.
DR   Proteomes; UP000000798; Chromosome.
DR   GO; GO:0005887; C:integral component of plasma membrane; IBA:GO_Central.
DR   GO; GO:0017038; P:protein import; IBA:GO_Central.
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 membrane; Membrane; Protein transport; Reference proteome;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..148
FT                   /note="Biopolymer transport protein ExbB"
FT                   /id="PRO_0000145798"
FT   TRANSMEM        9..29
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        67..87
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        97..117
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   148 AA;  16396 MW;  E095ED86281CF3D3 CRC64;
     MMEEIKELID YGIMGTLLFM SFVALAVGIE RYLSIRSTKV ENFKSKAQLE KELTKRLYII
     ATVASNAPYV GLLGTVLGIL LTFYIIGEKG IVNTKEIMVG LALALKATAL GLIVAIPSTI
     LYNFLVRKVR EKLLDWEAIH GECSSSHE