细菌病原体使用iminosugar glycosyrin来操纵植物的糖生物学
Nattapong Sanguankiattichai1,2, Balakumaran Chandrasekar1, Yuewen Sheng3
1Department of Biology, University of Oxford, Oxford, UK.
概括
像Pseudomonas syringae这样的植物病原体产生糖来逃避植物的免疫力. 这种分子抑制植物酶,防止细菌鞭毛蛋白的检测,并帮助感染.
科学领域:
- 植物病理学
- 微生物致病
- 葡萄糖生物学
背景情况:
- 植物的细胞外空间 (apoplast) 在植物微生物相互作用中至关重要.
- 形眼镜病毒. 番茄DC3000使用策略来逃避植物免疫识别.
- 细菌鞭含有免疫性,可触发植物的防御反应.
研究的目的:
- 阐明甘氨酸的结构,生物合成和功能.
- 了解甘氨酸如何促进病原体逃避植物免疫力.
- 探索草甘在植物病原体相互作用中的更广泛影响.
主要方法:
- 高分辨率的冷电子显微镜用于结构确定.
- 化学合成以确认结构并允许进一步研究.
- 分析糖氨酸在防止鞭毛蛋白识别中的作用.
- 对甘氨酸对植物细胞外糖蛋白组和代谢组的影响的研究.
主要成果:
- 糖是一种具有罗利丁环的免疫糖,模仿单糖.
- 它的生物合成由毒性因子调节.
- 葡萄糖素有效抑制植物酶β- 银酸酶BGAL1.
- 在细菌中,甘氨酸的产生很普遍,并且改变了宿主细胞外环境.
结论:
- 糖氨酸是Pseudomonas syringae pv的主要毒性因子. 番茄DC3000的使用情况.
- 它通过抑制植物酶来起作用,从而掩盖细菌鞭毛蛋白.
- 甘氨酸会影响宿主细胞外糖蛋白和代谢.
- 草甘生物学的病原体操纵是植物疾病的重要策略.
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