VIRB2_BARHE
ID VIRB2_BARHE Reviewed; 107 AA.
AC Q9R3F2;
DT 23-JAN-2007, integrated into UniProtKB/Swiss-Prot.
DT 01-MAY-2000, sequence version 1.
DT 03-AUG-2022, entry version 89.
DE RecName: Full=Type IV secretion system protein virB2;
DE Flags: Precursor;
GN Name=virB2; OrderedLocusNames=BH13260;
OS Bartonella henselae (strain ATCC 49882 / DSM 28221 / Houston 1)
OS (Rochalimaea henselae).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC Bartonellaceae; Bartonella.
OX NCBI_TaxID=283166;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX PubMed=10749166; DOI=10.1089/104454900314528;
RA Schmiederer M., Anderson B.E.;
RT "Cloning, sequencing, and expression of three Bartonella henselae genes
RT homologous to the Agrobacterium tumefaciens VirB region.";
RL DNA Cell Biol. 19:141-147(2000).
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX PubMed=10882236; DOI=10.1089/10445490050043344;
RA Padmalayam I., Karem K., Baumstark B.R., Massung R.;
RT "The gene encoding the 17-kDa antigen of Bartonella henselae is located
RT within a cluster of genes homologous to the virB virulence operon.";
RL DNA Cell Biol. 19:377-382(2000).
RN [3]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX PubMed=15210978; DOI=10.1073/pnas.0305659101;
RA Alsmark U.C.M., Frank A.C., Karlberg E.O., Legault B.-A., Ardell D.H.,
RA Canbaeck B., Eriksson A.-S., Naeslund A.K., Handley S.A., Huvet M.,
RA La Scola B., Holmberg M., Andersson S.G.E.;
RT "The louse-borne human pathogen Bartonella quintana is a genomic derivative
RT of the zoonotic agent Bartonella henselae.";
RL Proc. Natl. Acad. Sci. U.S.A. 101:9716-9721(2004).
RN [4]
RP INDUCTION.
RC STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX PubMed=11553594; DOI=10.1128/iai.69.10.6495-6502.2001;
RA Schmiederer M., Arcenas R., Widen R., Valkov N., Anderson B.E.;
RT "Intracellular induction of the Bartonella henselae virB operon by human
RT endothelial cells.";
RL Infect. Immun. 69:6495-6502(2001).
RN [5]
RP INTERACTION WITH 17 KDA ANTIGEN PROTEIN.
RX PubMed=15231811; DOI=10.1128/jb.186.14.4796-4801.2004;
RA Shamaei-Tousi A., Cahill R., Frankel G.;
RT "Interaction between protein subunits of the type IV secretion system of
RT Bartonella henselae.";
RL J. Bacteriol. 186:4796-4801(2004).
RN [6]
RP FUNCTION.
RC STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX PubMed=15049812; DOI=10.1111/j.1365-2958.2003.03964.x;
RA Schmid M.C., Schulein R., Dehio M., Denecker G., Carena I., Dehio C.;
RT "The VirB type IV secretion system of Bartonella henselae mediates
RT invasion, proinflammatory activation and antiapoptotic protection of
RT endothelial cells.";
RL Mol. Microbiol. 52:81-92(2004).
RN [7]
RP FUNCTION.
RC STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX PubMed=15642951; DOI=10.1073/pnas.0406796102;
RA Schulein R., Guye P., Rhomberg T.A., Schmid M.C., Schroeder G.,
RA Vergunst A.C., Carena I., Dehio C.;
RT "A bipartite signal mediates the transfer of type IV secretion substrates
RT of Bartonella henselae into human cells.";
RL Proc. Natl. Acad. Sci. U.S.A. 102:856-861(2005).
CC -!- FUNCTION: The type IV secretion system VirB/VirD4 is a major virulence
CC determinant for subversion of human endothelial cell (HEC) function.
CC VirB-dependent changes of HEC include massive cytoskeletal
CC rearrangements, a pro-inflammatory activation by nuclear factor NF-
CC kappa-B, inhibition of early and late events of apoptosis, leading to
CC an increased cell survival, and, at high infection doses, a cytostatic
CC or cytotoxic effect, which interfers with a potent VirB-independent
CC mitogenic activity. These changes of HEC require the T4S coupling
CC protein VirD4 and at least one of the effector proteins BepA-G. VirB2
CC seems to constitute the major pilus component.
CC {ECO:0000269|PubMed:15049812, ECO:0000269|PubMed:15642951}.
CC -!- SUBUNIT: Homooligomer (Potential). Interacts with the 17 kDa antigen
CC protein that is encoded within the virB locus.
CC {ECO:0000269|PubMed:15231811, ECO:0000305}.
CC -!- SUBCELLULAR LOCATION: Cell outer membrane {ECO:0000305}; Multi-pass
CC membrane protein {ECO:0000305}.
CC -!- INDUCTION: During the interaction with the intracellular environment of
CC host cells. {ECO:0000269|PubMed:11553594}.
CC -!- SIMILARITY: Belongs to the virB2 family. {ECO:0000305}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; U23447; AAD48919.1; -; Genomic_DNA.
DR EMBL; AF182718; AAF00940.1; -; Genomic_DNA.
DR EMBL; BX897699; CAF28099.1; -; Genomic_DNA.
DR RefSeq; WP_011181127.1; NZ_LRIJ02000001.1.
DR AlphaFoldDB; Q9R3F2; -.
DR STRING; 283166.BH13260; -.
DR PaxDb; Q9R3F2; -.
DR EnsemblBacteria; CAF28099; CAF28099; BH13260.
DR KEGG; bhe:BH13260; -.
DR eggNOG; COG3838; Bacteria.
DR OMA; VIAIAWM; -.
DR Proteomes; UP000000421; Chromosome.
DR GO; GO:0009279; C:cell outer membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR InterPro; IPR007039; TrbC/VirB2.
DR Pfam; PF04956; TrbC; 1.
PE 1: Evidence at protein level;
KW Cell outer membrane; Membrane; Signal; Transmembrane; Transmembrane helix;
KW Transport; Virulence.
FT SIGNAL 1..31
FT /evidence="ECO:0000255"
FT CHAIN 32..107
FT /note="Type IV secretion system protein virB2"
FT /id="PRO_0000273255"
FT TRANSMEM 49..71
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 83..103
FT /note="Helical"
FT /evidence="ECO:0000255"
SQ SEQUENCE 107 AA; 10962 MW; 7EA4BA28C241F2D1 CRC64;
MTDTISRNII FIIIMLLLTA LVVSDPSYAA AATGSASGLG NVDNVLQSIV TMMTGTTAKL
IATICVAAVG IGWMYGFIDL RKAAYCLIGI GIVFGASALV SKLTSAS
