An Insecticidal Protein from Xenorhabdus ehlersii Triggers Prophenoloxidase Activation and Hemocyte Decrease in Galleria mellonella

文献类型： 外文期刊

第一作者： Shi, Huaixing

作者： Shi, Huaixing;Zeng, Hongmei;Yang, Xiufen;Zhao, Jing;Chen, Mingjia;Qiu, Dewen

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期刊名称：CURRENT MICROBIOLOGY （ 影响因子：2.188； 五年影响因子：2.197 ）

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收录情况： SCI

摘要： The bacteria Xenorhabdus spp. are entomopathogenic symbionts that can produce several toxic proteins that interfere the immune system of insects. We purified an insecticidal protein from Xenorhabdus ehlersii, and designated it as XeGroEL with an estimated molecular mass of similar to 58 kDa. Galleria mellonella larva injected with XeGroEL presented prophenoloxidase activation and hemocyte decrease. XeGroEL can kill G. mellonella larva in 48 h with an LD50 of 0.76 +/- A 0.08 mu g/larva. Our results demonstrate that X. ehlersii possesses a toxic XeGroEL protein acting as a potential factor to activate proPO in host insect, which also provides a meaningful hypothesis to understand the interaction between nematode-symbiotic bacteria and host.

分类号： Q93

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