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这里的C.I.C. 优雅的免疫开关蛋白PALS-25和PALS-22定位到线粒体,并调节分裂

Spencer S Gang¹, Max W Strul¹, Emily R Troemel¹

¹School of Biological Sciences, University of California, San Diego, La Jolla, California, United States.

bioRxiv : the preprint server for biology

|November 24, 2025

概括

线虫C. elegans使用PALS基因家族来对抗微型虫. PALS-22和PALS-25蛋白质定位在线粒体中,它们的相互作用导致线粒体碎片化,增强免疫力.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
遗传学是一个遗传学.

背景情况:

线虫C. elegans利用PALS基因家族对细胞内病原体产生免疫力.
与哺乳动物相比,PALS基因家族在C. elegans中经历了显著的扩张.
帕尔斯-22作为负调节剂,抑制了积极的免疫调节剂帕尔斯-25.

研究的目的:

阐明PALS-22和PALS-25蛋白质的亚细胞定位和作用机制.
研究PALS-22/25相互作用在C. elegans免疫中的作用.
确定线粒体局部化和分裂对病原体耐药性的影响.

主要方法:

免疫光显微镜以确定蛋白质定位.
基因操纵用于研究功能丧失表型.
细胞内病原体反应 (IPR) 转录程序的分析.
评估微型菌的抗感染能力.

主要成果:

发现PALS-22和PALS-25蛋白质局部化到线粒体.
PALS-25对于PALS-22的线粒体局部化至关重要.
对于线粒体进口来说,PALS-25的C端是必要的,也是足够的.
失去PALS-22会导致IPR激活后的线粒体分裂.
线粒体分裂的独立诱导增强了对微粒体的抵抗力.

结论:

PALS-22和PALS-25在线粒体中相互作用,以调节线粒体的完整性.
由PALS-22/25复合体调解的线粒体碎片化增强了C. elegans对微粒体等细胞内病原体的免疫力.

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