Assembly and packing of clathrin into coats.

Assembly and packing of clathrin into coats.
复制标题

DOI:
10.1083/jcb.91.3.790
复制
发表时间:
1981-12
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Pearse BM
Pearse BM
中科院分区:
其他
文献类型:
--
作者:
Crowther RA;Pearse BM

文献摘要

参考文献

被引文献

相似文献

我们提出了一个模型,用于将网格蛋白分子包装成覆盖有涂层的凹坑和囊泡的特征六边形和五边形。组装单元是一个具有三个延伸腿的对称三聚体。在合适的条件下,这些单元的聚合在几秒钟内发生,产生类似于包被囊泡周围结构的空多面体笼。直接组装在电子显微镜网格上的小型负染色笼碎片的图像揭示了结构的细节,这与模型的预测特征密切相关。每个多面体顶点都有一个网格蛋白三聚体,并且三聚体的每条腿沿着两个相邻的多面体边缘延伸。不同尺寸的多面体中的五边形和六边形的准等效堆积需要分子顶点处的可变接头和每条腿上的铰链。网格蛋白涂层的结构因其每个分子与许多其他分子形成的扩展纤维接触而引人注目。当囊泡从膜上被夹断时,这种接触可以赋予机械强度和所需的柔韧性。
We present a model for the packing of clathrin molecules into the characteristic hexagons and pentagons covering coated pits and vesicles. The assembly unit is a symmetrical trimer with three extended legs. Polymerization of these units occurs in seconds under suitable conditions, giving empty polyhedral cages resembling the structures around coated vesicles. Images of small, negatively stained fragments of cages, assembled directly on electron microscope grids, reveal details of the structure, which correlate well with the predicted features of the model. There is one clathrin trimer at each polyhedral vertex, and each leg of the trimer extends along two neighboring polyhedral edges. Quasi-equivalent packing in pentagons and hexagons in polyhedra of different sizes requires a variable joint at the vertex of the molecule and a hinge in each leg. The construction of clathrin coats is remarkable for the extended fibrous contacts that each molecule makes with many others. Such contacts may confer mechanical strength combined with flexibility needed when a vesicle is pinched off from the membrane.
DOI: 10.1083/jcb.84.3.560
发表时间: 1980-03
期刊: The Journal of cell biology
影响因子: --
作者:
Heuser J
通讯作者: Heuser J
DOI: 10.1038/289420a0
发表时间: 1981-01-01
期刊: NATURE
影响因子: 64.8
作者:
UNGEWICKELL, E;BRANTON, D
通讯作者: BRANTON, D
DOI: 10.1016/0092-8674(79)90007-2
发表时间: 1979-01-01
期刊: CELL
影响因子: 64.5
作者:
KEEN, JH;WILLINGHAM, MC;PASTAN, IH
通讯作者: PASTAN, IH
DOI: 10.1016/0092-8674(81)90439-6
发表时间: 1981-01-01
期刊: CELL
影响因子: 64.5
作者:
KIRCHHAUSEN, T;HARRISON, SC
通讯作者: HARRISON, SC
DOI: 10.1016/s0022-2836(75)80024-6
发表时间: 1975-01-01
影响因子: 5.6
作者:
PEARSE, BMF
通讯作者: PEARSE, BMF