Mechanics of dynamin-mediated membrane fission.

Mechanics of dynamin-mediated membrane fission.
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DOI:
10.1146/annurev-biophys-050511-102247
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发表时间:
2013
影响因子:
12.4
通讯作者:
Roux A
Roux A
中科院分区:
生物学1区
文献类型:
--
作者:
Morlot S;Roux A

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在真核细胞中,膜分裂将膜分裂成两半。这确保了膜容器的不连续性,从而确保了适当的隔间。第一个涉及催化膜分裂的蛋白质机制是动力蛋白。动力蛋白在内吞质芽的颈部形成螺旋环。这一结构特征表明,动力素的螺旋可能会收缩,以促进封闭的膜的分裂。然而,验证这一假设本身就是一个挑战,这启发了许多体外和体内研究。这篇综述的主要目的是讨论最近生物物理研究中的结构和物理数据,这些研究加深了我们对动力素机制的理解。除了收缩假说,还提出了其他模型来解释动力素是如何诱导膜裂变的。我们提供了支持这些不同模型的实验数据,并评估了哪个模型最有可能。
In eukaryotic cells, membrane compartments are split into two by membrane fission. This ensures discontinuity of membrane containers and thus proper compartmentalization. The first proteic machinery implicated in catalyzing membrane fission was dynamin. Dynamin forms helical collars at the neck of endocytic buds. This structural feature suggested that the helix of dynamin could constrict in order to promote fission of the enclosed membrane. However, verifying this hypothesis revealed itself to be a challenge, which inspired many in vitro and in vivo studies. The primary goal of this review is to discuss recent structural and physical data from biophysical studies that have refined our understanding of the dynamin mechanism. In addition to the constriction hypothesis, other models have been proposed to explain how dynamin induces membrane fission. We present experimental data supporting these various models and assess which model is the most probable.
突变动力蛋白的诱导特异性阻断内吞涂层囊泡的形成。
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