Identification of genes in the VirR regulon of Pectobacterium atrosepticum and characterization of their roles in quorum sensing-dependent virulence.
Identification of genes in the VirR regulon of Pectobacterium atrosepticum and characterization of their roles in quorum sensing-dependent virulence.
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黑腐果杆菌 VirR 调节子中基因的鉴定及其在群体感应依赖性毒力中的作用特征。
DOI:
10.1111/j.1462-2920.2012.02822.x
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发表时间:
2013
影响因子:
5.1
通讯作者:
Monson R
中科院分区:
文献类型:
--
作者:
Monson R
In the economically important phytopathogen,Pectobacterium atrosepticum, expression of plant cell wall degrading enzymes and other virulence determinants is controlled in a cell density‐dependent fashion, termed quorum sensing (QS). Canonical QS systems in Gram‐negative bacteria contain a LuxI‐type protein, synthesizing a signalling molecule, and a LuxR‐type regulator, responding to the signalling molecule above threshold concentrations. InP. atrosepticum, the central LuxR‐type repressor of virulence, VirR, has been identified and its impacts on virulence characterized. Here we define the broader VirR regulon using chromatin immunoprecipitation (ChIP) andin plantamicroarrays. Ninety‐four direct VirR targets were identified by ChIP microarrays and a consensus VirR binding site was determined. Purified VirR was used in DNA gel shift assays on target promoters and VirR : promoter binding was disrupted by exogenous addition of the signalling molecule,N‐(3‐oxohexanoyl)‐l‐homoserine lactone (OHHL). VirR autorepressed, and directly activated the transcription ofrsmAin the absence of OHHL. Finally, we showed that VirR directly regulated the production of siderophores and controlled swimming motility. This is the first report characterizing the direct targets of VirR and provides clear evidence that this LuxR‐type protein can actin vivoas both an activator and repressor of transcription in the absence of its cognate signalling molecule.
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影响因子:
30.3
作者:
Roux A;Payne SM;Gilmore MS
通讯作者:
Gilmore MS
影响因子:
3.2
作者:
Chatterjee, A;Cui, YY;Chatterjee, AK
通讯作者:
Chatterjee, AK
影响因子:
3.2
作者:
ENARD, C;DIOLEZ, A;EXPERT, D
通讯作者:
EXPERT, D
DOI:
--
发表时间:
1984
期刊:
American Potato Journal
影响因子:
--
作者:
J. Bartz;A. Kelman
通讯作者:
A. Kelman
影响因子:
2.9
作者:
SCHWYN, B;NEILANDS, JB
通讯作者:
NEILANDS, JB