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EAP45 association with budding HIV-1: Kinetics and domain requirements
Traffic ( IF 3.6 ) Pub Date : 2021-09-27 , DOI: 10.1111/tra.12820
Bo Meng 1 , Pedro P Vallejo Ramirez 2 , Katharina M Scherer 2 , Ezra Bruggeman 2 , Julia C Kenyon 1, 3, 4 , Clemens F Kaminski 2 , Andrew M Lever 1, 5
Affiliation  

A number of viruses including HIV use the ESCRT system to bud from the infected cell. We have previously confirmed biochemically that ESCRT-II is involved in this process in HIV-1 and have defined the molecular domains that are important for this. Here, using SNAP-tag fluorescent labelling and both fixed and live cell imaging we show that the ESCRT-II component EAP45 colocalises with the HIV protein Gag at the plasma membrane in a temporal and quantitative manner, similar to that previously shown for ALIX and Gag. We show evidence that a proportion of EAP45 may be packaged within virions, and we confirm the importance of the N terminus of EAP45 and specifically the H0 domain in this process. By contrast, the Glue domain of EAP45 is more critical for recruitment during cytokinesis, emphasising that viruses have ways of recruiting cellular components that may be distinct from those used by some cellular processes. This raises the prospect of selective interference with the pathway to inhibit viral function while leaving cellular functions relatively unperturbed.

中文翻译:

EAP45 与萌芽 HIV-1 的关联:动力学和领域要求

包括 HIV 在内的许多病毒使用 ESCRT 系统从受感染的细胞中萌芽。我们之前已经在生化上证实了 ESCRT-II 参与了 HIV-1 的这一过程,并定义了对此很重要的分子结构域。在这里,使用 SNAP-tag 荧光标记以及固定和活细胞成像,我们显示 ESCRT-II 组分 EAP45 以时间和定量方式与质膜上的 HIV 蛋白 Gag 共定位,类似于之前对 ALIX 和 Gag 显示的情况. 我们展示了一部分 EAP45 可能被包装在病毒粒子内的证据,我们确认了 EAP45 的 N 末端的重要性,特别是 H0 结构域在这个过程中的重要性。相比之下,EAP45 的 Glue 域对于胞质分裂期间的募集更为关键,强调病毒具有募集细胞成分的方式,这些方式可能与某些细胞过程使用的方式不同。这提高了选择性干扰抑制病毒功能的途径的前景,同时使细胞功能相对不受干扰。
更新日期:2021-11-19
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