Vesicle formation by self-assembly of membrane-bound matrix proteins into a fluidlike budding domain.

Vesicle formation by self-assembly of membrane-bound matrix proteins into a fluidlike budding domain.
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通过将膜结合基质蛋白自组装成流体样的萌芽结构的囊泡形成。

DOI:
10.1083/jcb.200705062
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发表时间:
2007-11-19
影响因子:
7.8
通讯作者:
Frolov, Vadim A.
Frolov, Vadim A.
中科院分区:
生物学1区
文献类型:
--
作者:
Shnyrova, Anna V.;Ayllon, Juan;Mikhalyov, Ilya I.;Villar, Enrique;Zimmerberg, Joshua;Frolov, Vadim A.

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包膜病毒的形状主要取决于内部蛋白质基质,但目前还不清楚基质蛋白如何控制包膜膜的几何形状。我们发现,从纽卡斯尔病病毒中纯化的基质蛋白吸附在磷脂双层上,并凝聚成流体状结构域,导致膜变形和出芽的球形囊泡,如荧光和电子显微镜所示。膜的导纳的测量解决了芽的逐渐生长和快速闭合,随后其分离形成游离囊泡。囊泡的大小分布,局限于固有曲率的出芽域,但扩大了他们的合并,匹配的病毒大小分布。因此,基质蛋白实现结构域驱动的出芽机制,这足以控制这些蛋白脂质囊泡的形状。
The shape of enveloped viruses depends critically on an internal protein matrix, yet it remains unclear how the matrix proteins control the geometry of the envelope membrane. We found that matrix proteins purified from Newcastle disease virus adsorb on a phospholipid bilayer and condense into fluidlike domains that cause membrane deformation and budding of spherical vesicles, as seen by fluorescent and electron microscopy. Measurements of the electrical admittance of the membrane resolved the gradual growth and rapid closure of a bud followed by its separation to form a free vesicle. The vesicle size distribution, confined by intrinsic curvature of budding domains, but broadened by their merger, matched the virus size distribution. Thus, matrix proteins implement domain-driven mechanism of budding, which suffices to control the shape of these proteolipid vesicles.
DOI: 10.1016/j.ceb.2006.06.003
发表时间: 2006-08-01
影响因子: 7.5
作者:
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