酸-3酸盐通过PI3P结合的CgPil1蛋白调节铁的运输
Fizza Askari1, Bhogadi Vasavi2, Rupinder Kaur2
1Laboratory of Fungal Pathogenesis, Centre for DNA Fingerprinting and Diagnostics, Hyderabad 500039, India; Graduate Studies, Regional Centre for Biotechnology, Faridabad 121001, Haryana, India.
酸-3-酸 (PI3P) 通过控制CgPil1和铁输送器CgFtr1.1.之间的相互作用来调节Candida glabrata中的铁运输. 高水平的铁会触发PI3P介导的蛋白质定位和运输的变化,影响真菌的毒性.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 铁的稳态对于人类真菌病原体Candida glabrata的毒性至关重要.
- 酸丁醇3酶CgVps34在调节铁的稳态中起作用.
- 了解铁运输机制对于对抗真菌感染至关重要.
研究的目的:
- 为了识别参与Candida glabrata中铁平衡的蛋白质.
- 为了阐明酸-3酸 (PI3P) 在调节铁运输中的作用.
- 为了研究CgPil1,CgFtr1和PI3P之间的相互作用.
主要方法:
- 鉴定CgPil1作为PI3P结合蛋白.
- 在不同的铁条件下分析CgFtr1局部化和与CgPil1的相互作用.
- 调查CgFtr1无处可见化及其对蛋白质贩运的影响.
- 描述了E3-ubiquitin结合酶CgRsp5与CgFtr1.1.的相互作用.
主要成果:
- CgPil1在血膜 (PM) 中保留了高亲和度铁输送器CgFtr1.
- PI3P负面调节CgFtr1-CgPil1相互作用,在高铁环境中PI3P和PM局部化升高.
- 高铁诱导CgPil1和CgFtr1分别重新分配到细胞内和真空区.
- CgPil1或CgFtr1无处不在的损失导致了CgFtr1.1的ER贩运.
- CgRsp5与CgFtr1相互作用,形成PM点,在高铁暴露时内部化.
结论:
- PI3P是Candida glabrata中膜运输的关键调节者.
- 通过PI3P调节的CgFtr1-CgPil1相互作用对于铁的稳态至关重要.
- 这项研究揭示了一种控制人类真菌病原体铁吸收和毒性的新机制.
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