A complex regulatory network controlling intrinsic multidrug resistance in Mycobacterium smegmatis.

A complex regulatory network controlling intrinsic multidrug resistance in Mycobacterium smegmatis.
复制标题

DOI:
10.1111/mmi.12448
复制
发表时间:
2014-01
影响因子:
3.6
通讯作者:
Ghosh, Pallavi
Ghosh, Pallavi
中科院分区:
生物学2区
文献类型:
--
作者:
Bowman, Joshua;Ghosh, Pallavi

文献摘要

参考文献

被引文献

相似文献

分枝杆菌本质上对包括许多抗生素在内的各种压力具有抗性。尽管已经描述了许多途径来解释所观察到的抗性,但控制这些过程中所需基因表达的机制仍然不清楚。在这里,我们报告了预测的抗σ因子MSMEG_6129和预测的真核生物样丝氨酸/苏氨酸蛋白激酶MSMEG_5437在耻垢分枝杆菌对多种应激的内在抗性中的作用,所述应激包括遗传毒性剂丝裂霉素C、过氧化氢和至少四种不同的抗生素-异烟肼、氯霉素、红霉素和四环素。我们发现MSMEG_5437影响MSMEG_6129的磷酸化状态。此外,MSMEG_6129直接或通过WhiB 7等调节因子控制大量基因的表达,包括外排泵、ABC转运蛋白、过氧化氢酶和转录因子,这是观察到的多药耐药表型的原因。MSMEG_6129进而磷酸化邻近定位的推定抗-抗-σ因子MSMEG_6127。因此,我们认为MSMEG_5437、MSMEG_6129和MSMEG_6127是whiB 7上游的主调节网络的组成部分,该网络控制M中28个sigma因子中的一个或多个的活性。恶臭总之,这个网络控制着对几种无关抗生素产生耐药性所需的调节子的表达。
Mycobacteria are intrinsically resistant to a variety of stresses including many antibiotics. Although a number of pathways have been described to account for the observed resistances, the mechanisms that control the expression of genes required in these processes remain poorly defined. Here we report the role of a predicted anti-sigma factor, MSMEG_6129 and a predicted eukaryotic like serine/threonine protein kinase, MSMEG_5437, in the intrinsic resistance of Mycobacterium smegmatis to a variety of stresses including the genotoxic agent mitomycin C, hydrogen peroxide and at least four different antibiotics - isoniazid, chloramphenicol, erythromycin and tetracycline. We show that MSMEG_5437 influences the phosphorylation state of MSMEG_6129. Further, MSMEG_6129 controls the expression of a plethora of genes including efflux pumps, ABC transporters, catalases and transcription factors, either directly or via regulators like WhiB7, which account for the observed multi-drug resistance phenotypes. MSMEG_6129 in turn phosphorylates a contiguously located putative anti-anti-sigma factor, MSMEG_6127. We therefore propose that MSMEG_5437, MSMEG_6129 and MSMEG_6127 are components of a master regulatory network, upstream of whiB7, that controls the activity of one or more of the 28 sigma factors in M. smegmatis. Together, this network controls the expression of a regulon required for resistance to several unrelated antibiotics.
DOI: 10.1073/pnas.0505446102
发表时间: 2005-08-23
影响因子: 11.1
作者:
Morris, RP;Nguyen, L;Thompson, CJ
通讯作者: Thompson, CJ
DOI: 10.1128/aac.00656-06
发表时间: 2006-12-01
影响因子: 4.9
作者:
Buroni, Silvia;Manina, Giulia;De Rossi, Edda
通讯作者: De Rossi, Edda
DOI: 10.1038/ncomms1724
发表时间: 2012-03-20
影响因子: 16.6
作者:
通讯作者: --
DOI: 10.1046/j.1365-2958.2002.03135.x
发表时间: 2002-09-01
影响因子: 3.6
作者:
Beaucher, J;Rodrigue, S;Gaudreau, L
通讯作者: Gaudreau, L
DOI: 10.1046/j.1365-2958.2002.03162.x
发表时间: 2002-10-01
影响因子: 3.6
作者:
Larsen, MH;Vilchèze, C;Jacobs, WR
通讯作者: Jacobs, WR