Subunit cooperation in the Get1/2 receptor promotes tail-anchored membrane protein insertion.

Subunit cooperation in the Get1/2 receptor promotes tail-anchored membrane protein insertion.
复制标题

DOI:
10.1083/jcb.202103079
复制
发表时间:
2021-11-01
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Shan SO
Shan SO
中科院分区:
其他
文献类型:
--
作者:
Chio US;Liu Y;Chung S;Shim WJ;Chandrasekar S;Weiss S;Shan SO

文献摘要

参考文献

被引文献

相似文献

Chio 和 Liu 等人。研究表明,Get2 膜受体的胞质结构域在重塑和拆卸新生尾锚定蛋白的靶向复合物中发挥着不可预见的作用。 Get2 的新功能是由其无序连接子中的分子识别特征介导的。尾锚定蛋白 (GET) 途径的引导进入,其中 Get3 ATP 酶将一类必需的尾锚定膜蛋白 (TA) 传递至内质网的 Get1/2 受体,为真核细胞中 TA 的生物发生提供了保守的机制。该途径的膜相关事件仍然知之甚少。在这里,我们表明,Get1 和 Get2 的胞质结构域 (CD) 之间的复合物组装强烈增强了各个亚基对 Get3•TA 的亲和力,从而能够有效捕获靶向复合物。除了 Get1CD 在重塑 Get3 构象中的已知作用外,Get2CD 中的两个分子识别特征 (MoRF) 还会诱导 Get3 打开,并且这两个亚基都是 Get3 中最佳 TA 释放所必需的。 MoRF 的突变会减弱体内 TA 插入 ER 的能力。我们的结果证明了 Get1/2 受体亚基在靶向复合物的捕获和重塑中的广泛合作,并强调了 MoRF 在膜蛋白生物合成过程中受体功能中的作用。
Chio and Liu et al. show that the cytosolic domain of the Get2 membrane receptor plays an unforeseen role in remodeling and disassembling the targeting complex for nascent tail-anchored proteins. The new functions of Get2 are mediated by molecular recognition features in its disordered linker. The guided entry of tail-anchored protein (GET) pathway, in which the Get3 ATPase delivers an essential class of tail-anchored membrane proteins (TAs) to the Get1/2 receptor at the endoplasmic reticulum, provides a conserved mechanism for TA biogenesis in eukaryotic cells. The membrane-associated events of this pathway remain poorly understood. Here we show that complex assembly between the cytosolic domains (CDs) of Get1 and Get2 strongly enhances the affinity of the individual subunits for Get3•TA, thus enabling efficient capture of the targeting complex. In addition to the known role of Get1CD in remodeling Get3 conformation, two molecular recognition features (MoRFs) in Get2CD induce Get3 opening, and both subunits are required for optimal TA release from Get3. Mutation of the MoRFs attenuates TA insertion into the ER in vivo. Our results demonstrate extensive cooperation between the Get1/2 receptor subunits in the capture and remodeling of the targeting complex, and emphasize the role of MoRFs in receptor function during membrane protein biogenesis.
DOI: 10.1016/j.celrep.2018.12.035
发表时间: 2019-01-02
期刊: CELL REPORTS
影响因子: 8.8
作者:
Chio, Un Seng;Chung, SangYoon;Shan, Shu-ou
通讯作者: Shan, Shu-ou
DOI: 10.1038/nrm3226
发表时间: 2011-11-16
期刊: Nature reviews. Molecular cell biology
影响因子: --
作者:
通讯作者: --
DOI: 10.1186/1471-2105-14-300
发表时间: 2013-10-04
期刊: BMC bioinformatics
影响因子: 3
作者:
Fang C;Noguchi T;Tominaga D;Yamana H
通讯作者: Yamana H
DOI: 10.1093/nar/gkw409
发表时间: 2016-07-08
影响因子: 14.9
作者:
Malhis N;Jacobson M;Gsponer J
通讯作者: Gsponer J
DOI: 10.1371/journal.pone.0160716
发表时间: 2016-08-17
期刊: PLOS ONE
影响因子: 3.7
作者:
Ingargiola, Antonino;Lerner, Eitan;Michalet, Xavier
通讯作者: Michalet, Xavier