Abrogating ALIX Interactions Results in Stuttering of the ESCRT Machinery.

Abrogating ALIX Interactions Results in Stuttering of the ESCRT Machinery.
复制标题

DOI:
10.3390/v12091032
复制
发表时间:
2020-09-16
期刊:
Viruses
影响因子:
--
通讯作者:
Saffarian S
Saffarian S
中科院分区:
其他
文献类型:
--
作者:
Gupta S;Bendjennat M;Saffarian S

文献摘要

参考文献

相似文献

运输所需的内体分选复合物 (ESCRT) 蛋白在出芽细胞膜上组装并催化其裂变。通过对从细胞中出芽的 HIV 病毒颗粒进行实时成像,我们追踪了 ESCRT 蛋白 ALIX、CHMP4B 和 VPS4 的招募情况。我们报告说,在病毒体组装完成后,ESCRT 蛋白短暂地与病毒体共定位,持续时间为 45 ± 30 秒。我们发现,对作为主要 ALIX 结合位点的 Gag 的 YP 结构域进行诱变或从细胞中耗尽 ALIX 会导致同一病毒体上完整 ESCRT 机制的多次募集(称为口吃,其中同一病毒体的募集数量 >3)。口吃的招募间隔大约 4 ± 3 分钟,并且与野生型相互作用中的单次招募具有相同的 ESCRT 化学计量和相同的停留时间 (45 ± 30 s)。我们的观察表明 ALIX 在裂变过程中发挥着作用,并对 ESCRT 募集的线性模型提出质疑,建议采用更复杂的共组装模型。
Endosomal sorting complexes required for transport (ESCRT) proteins assemble on budding cellular membranes and catalyze their fission. Using live imaging of HIV virions budding from cells, we followed recruitment of ESCRT proteins ALIX, CHMP4B and VPS4. We report that the ESCRT proteins transiently co-localize with virions after completion of virion assembly for durations of 45 ± 30 s. We show that mutagenizing the YP domain of Gag which is the primary ALIX binding site or depleting ALIX from cells results in multiple recruitments of the full ESCRT machinery on the same virion (referred to as stuttering where the number of recruitments to the same virion >3). The stuttering recruitments are approximately 4 ± 3 min apart and have the same stoichiometry of ESCRTs and same residence time (45 ± 30 s) as the single recruitments in wild type interactions. Our observations suggest a role for ALIX during fission and question the linear model of ESCRT recruitment, suggesting instead a more complex co-assembly model.
DOI: 10.1371/journal.ppat.1000652
发表时间: 2009-11
期刊: PLoS pathogens
影响因子: 6.7
作者:
Ivanchenko S;Godinez WJ;Lampe M;Kräusslich HG;Eils R;Rohr K;Bräuchle C;Müller B;Lamb DC
通讯作者: Lamb DC
DOI: 10.1016/s0092-8674(01)00434-2
发表时间: 2001-07-27
期刊: CELL
影响因子: 64.5
作者:
Katzmann, DJ;Babst, M;Emr, SD
通讯作者: Emr, SD
DOI: 10.1083/jcb.201110031
发表时间: 2012-04-30
期刊: The Journal of cell biology
影响因子: --
作者:
Dores MR;Chen B;Lin H;Soh UJ;Paing MM;Montagne WA;Meerloo T;Trejo J
通讯作者: Trejo J
DOI: 10.1016/j.devcel.2012.10.023
发表时间: 2012-12-11
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
作者:
Dowlatshahi, Dara P.;Sandrin, Virginie;Kopito, Ron R.
通讯作者: Kopito, Ron R.
DOI: 10.1126/science.1143422
发表时间: 2007-06-29
期刊: SCIENCE
影响因子: 56.9
作者:
Carlton, Jez G.;Martin-Serrano, Juan
通讯作者: Martin-Serrano, Juan