A multivalent fuzzy interface drives reversible COPII coat assembly
A multivalent fuzzy interface drives reversible COPII coat assembly
复制标题
多价模糊界面驱动可逆 COPII 涂层组装
DOI:
10.1101/2020.04.15.043356
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Stancheva V
中科院分区:
文献类型:
--
作者:
Stancheva V
Protein secretion is initiated at the endoplasmic reticulum by the COPII coat, which self-assembles to form vesicles. Here, we examine the mechanisms by which the outer scaffolding layer of the coat drives local assembly of a structure rigid enough to enforce membrane curvature, yet able to readily disassemble at the Golgi. An intrinsically disordered region in the outer coat protein, Sec31, drives binding with an inner coat layer via multiple distinct interfaces. Interactions are individually dispensable but combinatorially reinforce each other, suggesting coat oligomerization is driven by the cumulative effects of multivalent interactions. Such a multimodal assembly platform could be readily reversed at the Golgi via perturbation of each individual interface. These design principles provide an explanation for how cells build a powerful yet transient scaffold to direct vesicle traffic.
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期刊:
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