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RAB12-LRRK2复合物抑制了初级纤维生成,并调节了星体细胞中中枢细胞同静性

Xingjian Li^1,2, Hanwen Zhu³, Bik Tzu Huang^1,4,5

¹Department of Neurology, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.

bioRxiv : the preprint server for biology

|July 29, 2024

概括

研究人员确定RAB12是大脑中富含白素的重复激酶2 (LRRK2) 的关键标. 这种相互作用调节细胞结构,为帕金森病 (PD) 提供新的治疗点.

科学领域:

细胞生物学细胞生物学
神经科学是一个神经科学.
结构生物学结构生物学

背景情况:

氨酸丰富的重复激酶2 (LRRK2) 通过其对RAB GTPases的酸化,与帕金森病 (PD) 有关.
在大脑功能中LRRK2-酸化RAB GTPases的特定作用,特别是与PD相关的作用,尚未完全理解.

研究的目的:

为了识别大脑中的新型LRRK2基质.
阐明RAB12-LRRK2复合体在调节纤毛发育和中心体平衡中的功能.
为治疗开发提供RAB12-LRRK2相互作用的结构性见解.

主要方法:

蛋白学分析以识别小鼠大脑中的LRRK2基质.
电子显微镜 (Cryo-EM) 用于确定RAB12-LRRK2蛋白质复合物的结构.
在星球细胞中进行基因操纵 (基因删除) 以评估功能后果.

主要成果:

在小鼠大脑中,RAB12被确定为LRRK2的直接基质.
RAB12-LRRK2复合体抑制了初级纤维生成,并调节了星球细胞中的中心细胞组稳定.
这一规则涉及RAB10酸化和RAB交互溶酶体蛋白像1 (RILPL1) 的招募.
与PD相关的LRRK2突变对纤毛和中心细胞的影响通过RAB12删除得到改善.

结论:

这项研究揭示了RAB12-LRRK2复合体在纤毛发育和中心体平衡中的新生理作用.
阐明了RAB12-LRRK2复合物的结构,为通过调节这种相互作用来开发针对PD的治疗方法提供了基础.

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