ID   VIRB9_RHIRD             Reviewed;         293 AA.
AC   P0A3W6; P05358; P09782;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   15-MAR-2005, sequence version 1.
DT   25-MAY-2022, entry version 70.
DE   RecName: Full=Protein virB9;
DE   Flags: Precursor;
GN   Name=virB9;
OS   Rhizobium radiobacter (Agrobacterium tumefaciens) (Agrobacterium
OS   radiobacter).
OG   Plasmid pTiA6.
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Rhizobiaceae; Rhizobium/Agrobacterium group; Agrobacterium;
OC   Agrobacterium tumefaciens complex.
OX   NCBI_TaxID=358;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3281947; DOI=10.1016/s0021-9258(18)60637-4;
RA   Ward J.E., Akiyoshi D.E., Regier D., Datta A., Gordon M.P., Nester E.W.;
RT   "Characterization of the virB operon from an Agrobacterium tumefaciens Ti
RT   plasmid.";
RL   J. Biol. Chem. 263:5804-5814(1988).
RN   [2]
RP   ERRATUM OF PUBMED:3281947, AND SEQUENCE REVISION.
RX   PubMed=2307685; DOI=10.1016/s0021-9258(19)39628-0;
RA   Ward J.E., Akiyoshi D.E., Regier D., Datta A., Gordon M.P., Nester E.W.;
RL   J. Biol. Chem. 265:4768-4768(1990).
RN   [3]
RP   DISULFIDE BOND, AND MUTAGENESIS OF CYS-262.
RX   PubMed=8799123; DOI=10.1073/pnas.93.17.8889;
RA   Anderson L.B., Hertzel A.V., Das A.;
RT   "Agrobacterium tumefaciens VirB7 and VirB9 form a disulfide-linked protein
RT   complex.";
RL   Proc. Natl. Acad. Sci. U.S.A. 93:8889-8894(1996).
CC   -!- FUNCTION: Is essential for the biogenesis of the T-pilus, which is
CC       required for virulence and T-DNA transfer to plant cells. When is
CC       associated with virB7, might function as a nucleation center for
CC       recruitment of VirB proteins during assembly of the T-DNA transfer
CC       machine.
CC   -!- SUBUNIT: Heterodimer of virB7 and virB9; disulfide-linked.
CC       {ECO:0000269|PubMed:8799123}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane; Peripheral membrane protein.
CC   -!- SIMILARITY: Belongs to the TrbG/VirB9 family. {ECO:0000305}.
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DR   EMBL; J03216; AAA88654.1; -; Genomic_DNA.
DR   EMBL; AF242881; AAF77169.1; -; Genomic_DNA.
DR   PIR; S00785; B9AG55.
DR   RefSeq; NP_059807.1; NC_002377.1.
DR   RefSeq; WP_010892495.1; NZ_QSNU01000012.1.
DR   AlphaFoldDB; P0A3W6; -.
DR   SMR; P0A3W6; -.
DR   IntAct; P0A3W6; 1.
DR   TCDB; 3.A.7.1.1; the type iv (conjugal dna-protein transfer or virb) secretory pathway (ivsp) family.
DR   OrthoDB; 1251301at2; -.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   CDD; cd06911; VirB9_CagX_TrbG; 1.
DR   Gene3D; 2.60.40.2500; -; 1.
DR   InterPro; IPR010258; Conjugal_tfr_TrbG/VirB9/CagX.
DR   InterPro; IPR014148; VirB9.
DR   InterPro; IPR033645; VirB9/CagX/TrbG_C.
DR   InterPro; IPR038161; VirB9/CagX/TrbG_C_sf.
DR   Pfam; PF03524; CagX; 1.
DR   TIGRFAMs; TIGR02781; VirB9; 1.
PE   1: Evidence at protein level;
KW   Cell membrane; Crown gall tumor; Disulfide bond; Membrane; Plasmid; Signal;
KW   Virulence.
FT   SIGNAL          1..21
FT                   /evidence="ECO:0000255"
FT   CHAIN           22..293
FT                   /note="Protein virB9"
FT                   /id="PRO_0000022674"
FT   DISULFID        262
FT                   /note="Interchain (with C-24 in virB7)"
FT                   /evidence="ECO:0000269|PubMed:8799123"
FT   MUTAGEN         262
FT                   /note="C->S: No virB7-virB9 complex formation."
FT                   /evidence="ECO:0000269|PubMed:8799123"
SQ   SEQUENCE   293 AA;  32172 MW;  1BA2E48058E7DD19 CRC64;
     MTRKALFILA CLFAAATGAE AEDTPMAGKL DPRMRYLAYN PDQVVRLSTA VGATLVVTFA
     TNETVTSVAV SNSKDLAALP RGNYLFFKAS QVLTPQPVIV LTASDSGMRR YVFSISSKTL
     SHLDKEQPDL YYSVQFAYPA DDAAARRREA QQRAVVDRLH AEAQYQRKAE DLLDQPVTAL
     GATDSNWHYV AQGDRSLLPL EVFDNGFTTV FHFPGNVRIP SIYTINPDGK EAVANYSVKG
     SDVEISSVSR GWRLRDGHTV LCIWNAAYDP VGQRPQTGTV RPDVKRVLKG AKG