ID   PTLB_BORBR              Reviewed;         104 AA.
AC   Q7WDU2;
DT   15-MAY-2007, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   25-MAY-2022, entry version 69.
DE   RecName: Full=Type IV secretion system protein PtlB homolog;
GN   Name=ptlB; OrderedLocusNames=BB4896;
OS   Bordetella bronchiseptica (strain ATCC BAA-588 / NCTC 13252 / RB50)
OS   (Alcaligenes bronchisepticus).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC   Alcaligenaceae; Bordetella.
OX   NCBI_TaxID=257310;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-588 / NCTC 13252 / RB50;
RX   PubMed=12910271; DOI=10.1038/ng1227;
RA   Parkhill J., Sebaihia M., Preston A., Murphy L.D., Thomson N.R.,
RA   Harris D.E., Holden M.T.G., Churcher C.M., Bentley S.D., Mungall K.L.,
RA   Cerdeno-Tarraga A.-M., Temple L., James K.D., Harris B., Quail M.A.,
RA   Achtman M., Atkin R., Baker S., Basham D., Bason N., Cherevach I.,
RA   Chillingworth T., Collins M., Cronin A., Davis P., Doggett J., Feltwell T.,
RA   Goble A., Hamlin N., Hauser H., Holroyd S., Jagels K., Leather S.,
RA   Moule S., Norberczak H., O'Neil S., Ormond D., Price C., Rabbinowitsch E.,
RA   Rutter S., Sanders M., Saunders D., Seeger K., Sharp S., Simmonds M.,
RA   Skelton J., Squares R., Squares S., Stevens K., Unwin L., Whitehead S.,
RA   Barrell B.G., Maskell D.J.;
RT   "Comparative analysis of the genome sequences of Bordetella pertussis,
RT   Bordetella parapertussis and Bordetella bronchiseptica.";
RL   Nat. Genet. 35:32-40(2003).
RN   [2]
RP   TRANSCRIPTIONAL SILENCING.
RC   STRAIN=ATCC 4617 / NCIB 9935 / NCTC 8344 / NRRL B-140;
RX   PubMed=3584073; DOI=10.1128/jb.169.6.2847-2853.1987;
RA   Arico B., Rappuoli R.;
RT   "Bordetella parapertussis and Bordetella bronchiseptica contain
RT   transcriptionally silent pertussis toxin genes.";
RL   J. Bacteriol. 169:2847-2853(1987).
RN   [3]
RP   POSSIBLE EXPRESSION OF PTL AND PTX PROTEINS UNDER CONDITIONS DIFFERENT FROM
RP   B.PERTUSSIS EXPRESSION CONDITIONS.
RC   STRAIN=ATCC 31437 / Bb55;
RX   PubMed=8926063; DOI=10.1128/iai.64.10.4020-4026.1996;
RA   Hausman S.Z., Cherry J.D., Heininger U., Wirsing von Koenig C.H.,
RA   Burns D.L.;
RT   "Analysis of proteins encoded by the ptx and ptl genes of Bordetella
RT   bronchiseptica and Bordetella parapertussis.";
RL   Infect. Immun. 64:4020-4026(1996).
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000305}; Single-pass membrane
CC       protein {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the virB3 family. {ECO:0000305}.
CC   -!- CAUTION: B.parapertussis and B.bronchiseptica seem not to produce the
CC       pertussis toxin (S1, S2, S4, S5 and S3) and ptl proteins (PtlA, PtlB,
CC       PtlC, PtlD, PtlE, PtlF, PtlG, PtlH and PtlI) in vivo due to changes in
CC       the promoter region of the ptx-ptl operon. However, it is possible that
CC       their promoter is active under certain, as-yet-undefined conditions and
CC       that B.parapertussis and B.bronchiseptica are therefore capable of
CC       producing these proteins. {ECO:0000305}.
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DR   EMBL; BX640451; CAE35259.1; -; Genomic_DNA.
DR   RefSeq; WP_003815858.1; NC_002927.3.
DR   AlphaFoldDB; Q7WDU2; -.
DR   STRING; 257310.BB4896; -.
DR   EnsemblBacteria; CAE35259; CAE35259; BB4896.
DR   GeneID; 56476605; -.
DR   KEGG; bbr:BB4896; -.
DR   eggNOG; COG3702; Bacteria.
DR   HOGENOM; CLU_158477_0_0_4; -.
DR   OMA; WIDTKFR; -.
DR   OrthoDB; 1730670at2; -.
DR   Proteomes; UP000001027; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   InterPro; IPR007792; T4SS_VirB3/TrbD/AvhB.
DR   Pfam; PF05101; VirB3; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Membrane; Transmembrane; Transmembrane helix.
FT   CHAIN           1..104
FT                   /note="Type IV secretion system protein PtlB homolog"
FT                   /id="PRO_0000287407"
FT   TRANSMEM        30..50
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   104 AA;  12284 MW;  581DD0CA817164B4 CRC64;
     MRDPLFKGCT RPAMLMGVPA TPLAVCSGTI ALLGIWFSIA FLALFPVALL AMRIMIRRDD
     QQFRLIWLYL RMRWLSRDRT HAFWQSTVYA PLRYAERRQR LRKP