Altered-function mutations of the transcriptional regulatory gene virG of Agrobacterium tumefaciens

Altered-function mutations of the transcriptional regulatory gene virG of Agrobacterium tumefaciens
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根癌农杆菌转录调控基因virG的功能突变

DOI:
10.1128/jb.174.21.7040-7043.1992
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发表时间:
1992
影响因子:
3.2
通讯作者:
S. C. Winans
S. C. Winans
中科院分区:
生物学3区
文献类型:
--
作者:
D. Han;C. Y. Chen;Y. F. Chen;S. C. Winans

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通过在不添加酚类诱导化合物的情况下筛选 vir 基因表达,在根癌农杆菌 virG 基因中分离出三个点突变。所有三个突变均位于预测的蛋白质氨基末端磷酰基受体结构域中。一种突变体 (N54D) 绕过了所有测试的 vir 启动子的转录激活和植物肿瘤发生对 VirA 和酚类诱导剂的需求。该突变体还在中性 pH 下有效激活 vir 基因表达,表明通常由酸性 pH 刺激的诱导步骤发生在 VirG 磷酸化之前或期间。另外两种突变体(M13T 和 H15R)需要 VirA 才能发挥活性,但对低水平的诱导刺激敏感。
Three point mutations were isolated in the Agrobacterium tumefaciens virG gene by screening for vir gene expression in the absence of added phenolic inducing compounds. All three mutations were localized in the predicted amino-terminal phosphoryl receiver domain of the protein. One mutant (N54D) bypasses the requirement for VirA and phenolic inducers both for transcriptional activation of all tested vir promoters and for plant tumorigenesis. This mutant also activates vir gene expression efficiently at neutral pH, indicating that the step in induction that is normally stimulated by acid pH occurs before or during VirG phosphorylation. The other two mutants (M13T and H15R) require VirA for activity but are sensitized to low levels of inducing stimuli.
DOI: 10.2210/pdb3chy/pdb
发表时间: 1993-01
期刊: The Journal of biological chemistry
影响因子: --
作者:
K. Volz;Philip Matsumura
通讯作者: K. Volz;Philip Matsumura
DOI: 10.1002/j.1460-2075.1987.tb04830.x
发表时间: 1987-04-01
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
LEROUX, B;YANOFSKY, MF;NESTER, EW
通讯作者: NESTER, EW
农杆菌毒力所必需的基因与正调控基因座家族同源。
DOI: 10.1073/pnas.83.21.8278
发表时间: 1986
影响因子: 11.1
作者:
Winans,SC;Ebert,PR;Stachel,SE;Gordon,MP;Nester,EW
通讯作者: Nester,EW
DOI: 10.1073/pnas.87.17.6708
发表时间: 1990-09-01
影响因子: 11.1
作者:
CANGELOSI, GA;ANKENBAUER, RG;NESTER, EW
通讯作者: NESTER, EW