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Environ Microbiol:分支杆菌研究新进展

2017-04-30 MedSci MedSci原创

近期在Environ Microbiol杂志上发表的一篇文章,就耻垢分枝杆菌中的MceG ATP酶的多效性进行了研究。Mce系统是一个复杂的ABC转运蛋白,在放线菌体内由不同数量的同源操纵子所编码。结核分枝杆菌所具有的4个Mce系统,均是由单一的ATP酶、MceG供能,每个系统摄入的脂肪酸和植物胆固醇似乎都不同。该研究的目的是探索腐物寄生性分支杆菌是否也存在这种行为。腐物寄生性分支杆菌与结核分枝杆

近期在Environ Microbiol杂志上发表的一篇文章,就耻垢分枝杆菌中的MceG ATP酶的多效性进行了研究。

Mce系统是一个复杂的ABC转运蛋白,在放线菌体内由不同数量的同源操纵子所编码。结核分枝杆菌所具有的4个Mce系统,均是由单一的ATP酶、MceG供能,每个系统摄入的脂肪酸和植物胆固醇似乎都不同。

该研究的目的是探索腐物寄生性分支杆菌是否也存在这种行为。腐物寄生性分支杆菌与结核分枝杆菌比较,有着更复杂的基因组编码的更多数目的Mce系统。我们目前已经对耻垢分枝杆菌的MceG的同源基因能够识别以及掌握了其特点。这种细菌依赖于 MceG为Mce系统供能,有助于各种各样的细胞功能活化,包括胆固醇的摄取和细胞膜功能的维持。

在缺乏MceG的细胞中,耻垢分枝杆菌不能够利用胆固醇及植物甾醇作为碳源,这一现象提示了ATP酶对于Mce-4胆固醇转运系统的供能是必需的。在Mce突变型中观察到的其他的表性变化现象,例如细胞膜的修饰,提示Mce系统具有多效性,在应激反应中尤其重要。

原始出处:

García-Fernández J, Papavinasasundaram K, Galán B,et al.Unraveling the pleiotropic role of the MceG ATPase in Mycobacterium smegmatis.Environ Microbiol. 2017 Apr 26. doi: 10.1111/1462-2920.13771.

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    2017-05-22 sunylz
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    2017-08-15 xjy02
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    2017-05-02 july_979

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