Glutamate dehydrogenase enables Salmonella to survive under oxidative stress and escape from clearance in macrophages
Glutamate dehydrogenase enables Salmonella to survive under oxidative stress and escape from clearance in macrophages
复制标题
谷氨酸脱氢酶使沙门氏菌能够在氧化应激下生存并逃避巨噬细胞的清除
DOI:
10.1002/1873-3468.14247
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发表时间:
2021-12
期刊:
影响因子:
3.5
通讯作者:
Wang Qijun
中科院分区:
文献类型:
--
作者:
Huang Xi;Lao Wenji;Zhou Youci;Sun Yunwei;Wang Qijun
Oxidative stress and the production of reactive oxygen species (ROS) are a biological threat to bacteria, which induce the synthesis of proteins and production of antioxidants to combat it. Herein, we report that glutamate dehydrogenase (GDH) of Salmonella can assimilate ammonium into glutamate and promote the generation of glutathione (GSH) to combat oxidative damage. Oxidation induces the transcription of gdhA, which encodes GDH, and activates the enzymatic activity of GDH. The ΔgdhA mutant Salmonella strain showed decreased levels of GSH and reduced survival in macrophages, and this growth deficiency could be partially restored by overexpression of GDH and complementation with its downstream metabolites. Therefore, GDH plays a critical role in the growth of Salmonella in oxidative environments, especially under low energy supply.
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