Cloning, sequencing, and expression of three Bartonella henselae genes homologous to the Agrobacterium tumefaciens VirB region.
Cloning, sequencing, and expression of three Bartonella henselae genes homologous to the Agrobacterium tumefaciens VirB region.
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与根癌农杆菌 VirB 区域同源的三个汉赛巴尔通体基因的克隆、测序和表达。
DOI：
10.1089/104454900314528
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发表时间：
2000
影响因子：
3.1
通讯作者：
Anderson,B
中科院分区：
文献类型：
--
作者：
Schmiederer,M;Anderson,B
A 17-kDa, immunodominant antigen ofBartonella henselaeHouston-1 has previously been cloned, sequenced, and characterized. This clone (H13) contains the 17-kDa antigen gene plus a partial open reading frame, designated ORF1, which is 459 nucleotides long and is directly upstream of the 17-kDa gene. Comparison of the deduced partial amino acid sequence of ORF1 with that of other known genes in GenBank revealed significant identity with several other bacterial virulence genes, including VirB4 of theAgrobacterium tumefaciensvirB operon (56/149 amino acids). An overlapping clone, pGB3, was recovered and shown to contain a 3.0-kb region upstream of the 17-kDa gene. Sequence analysis revealed three ORFs upstream of the gene. The deduced amino acid sequence of each ORF was compared with sequences in GenBank, and identity was found with VirB2, VirB3, and VirB4 ofA. tumefaciens.In vitrotranscription/translation and SDS-PAGE demonstrated that three proteins of 9 kDa, 10 kDa, and 92 kDa, corresponding to the predicted molecular weight of 10.9 kDa, 11.7 kDa, and 89.9 kDa of VirB2, VirB3, and VirB4, respectively, could be expressed from these coding regions. These results indicate that virulence-associated genes and their overall chromosomal arrangement are relatively well conserved betweenB. henselaeand other gram-negative bacteria such asA. tumefaciens.
