Structural analysis of the full-length human LRRK2.

Structural analysis of the full-length human LRRK2.
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人LRRK2全长基因的结构分析。

DOI:
10.1016/j.cell.2021.05.004
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发表时间:
2021-06-24
期刊:
影响因子:
64.5
通讯作者:
Sun J
Sun J
中科院分区:
生物学1区
文献类型:
--
作者:
Myasnikov A;Zhu H;Hixson P;Xie B;Yu K;Pitre A;Peng J;Sun J

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富含亮氨酸重复序列激酶2(LRRK2)的突变通常与家族性和散发性帕金森病(PD)的发病机制有关。LRRK2调节膜细胞器的关键细胞过程并形成基于微管的致病细丝,但LRRK2这些生物学作用的分子基础在很大程度上仍然是谜。在这里,我们确定了全长人类LRRK2的高分辨率结构,揭示了其结构和关键的结构域间支架元件,以合理化致病突变。LRRK2的激酶结构域在非活性状态下被捕获,最常见的PD相关突变LRRK2G2019S也采用这种构象。这种构象作为一个框架的构象特异性抑制剂的结构导向设计。我们进一步确定了COR介导的LRRK2二聚体的结构,发现二聚体界面处的单点突变消除了细胞中的致病性抑制。总的来说,我们的研究为LRRK2的生理和病理作用提供了机制性见解,并为PD的未来治疗干预建立了结构模板。
Mutations in leucine-rich repeat kinase 2 (LRRK2) are commonly implicated in the pathogenesis of both familial and sporadic Parkinson’s disease (PD). LRRK2 regulates critical cellular processes at membranous organelles and forms microtubule-based pathogenic filaments, yet the molecular basis underlying these biological roles of LRRK2 remains largely enigmatic. Here we determined high-resolution structures of full-length human LRRK2, revealing its architecture and key interdomain scaffolding elements for rationalizing disease-causing mutations. The kinase domain of LRRK2 is captured in an inactive state, a conformation also adopted by the most common PD-associated mutation, LRRK2G2019S. This conformation serves as a framework for structure-guided design of conformational specific inhibitors. We further determined the structure of COR-mediated LRRK2 dimers and found that single-point mutations at the dimer interface abolished pathogenic filamentation in cells. Overall, our study provides mechanistic insights into physiological and pathological roles of LRRK2 and establishes a structural template for future therapeutic intervention in PD.
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