Structure of Venezuelan equine encephalitis virus in complex with the LDLRAD3 receptor.

Structure of Venezuelan equine encephalitis virus in complex with the LDLRAD3 receptor.
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DOI:
10.1038/s41586-021-03963-9
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发表时间:
2021-10
期刊:
影响因子:
64.8
通讯作者:
Fremont DH
Fremont DH
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Basore K;Ma H;Kafai NM;Mackin S;Kim AS;Nelson CA;Diamond MS;Fremont DH

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LDLRAD 3是最近定义的委内瑞拉马脑炎病毒(VEEV)的附着和进入受体,VEEV是一种导致人类严重神经系统疾病的新世界甲病毒。在这里,我们提出了近原子分辨率冷冻电子显微镜重建VEEV病毒样颗粒单独和在一个复杂的LDLRAD 3的胞外域。LDLRAD 3的结构域1是低密度脂蛋白受体A型模块,其通过楔入由一个三聚体刺突中的两个相邻E2-E1异二聚体产生的裂缝中与VEEV结合,并接合E2的结构域A和B以及E1中的融合环。该界面的原子建模得到诱变和抗VEEV抗体结合竞争测定的支持。值得注意的是,VEEV以类似于致关节炎甲病毒结合结构上不相关的MXRA 8受体的方式结合LDLRAD 3,但界面要小得多。这些研究进一步阐明了甲病毒-受体相互作用的结构基础,这可以为开发减轻该家族多个成员感染和疾病的疗法提供信息。与LDLRAD 3复合的委内瑞拉马脑炎病毒的结构为甲病毒-受体相互作用的结构基础提供了见解。
LDLRAD3 is a recently defined attachment and entry receptor for Venezuelan equine encephalitis virus (VEEV), a New World alphavirus that causes severe neurological disease in humans. Here we present near-atomic-resolution cryo-electron microscopy reconstructions of VEEV virus-like particles alone and in a complex with the ectodomains of LDLRAD3. Domain 1 of LDLRAD3 is a low-density lipoprotein receptor type-A module that binds to VEEV by wedging into a cleft created by two adjacent E2–E1 heterodimers in one trimeric spike, and engages domains A and B of E2 and the fusion loop in E1. Atomic modelling of this interface is supported by mutagenesis and anti-VEEV antibody binding competition assays. Notably, VEEV engages LDLRAD3 in a manner that is similar to the way that arthritogenic alphaviruses bind to the structurally unrelated MXRA8 receptor, but with a much smaller interface. These studies further elucidate the structural basis of alphavirus–receptor interactions, which could inform the development of therapies to mitigate infection and disease against multiple members of this family. The structure of the Venezuelan equine encephalitis virus in complex with LDLRAD3 provides insights into the structural basis of alphavirus–receptor interactions.
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发表时间: 2021-07-15
影响因子: 5.9
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DOI: 10.1016/j.cell.2019.04.006
发表时间: 2019-06-13
期刊: CELL
影响因子: 64.5
作者:
Basore, Katherine;Kim, Arthur S.;Fremont, Daved H.
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