Atomic structure of the Y complex of the nuclear pore.

Atomic structure of the Y complex of the nuclear pore.
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DOI:
10.1038/nsmb.2998
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发表时间:
2015-05
影响因子:
16.8
通讯作者:
Schwartz TU
Schwartz TU
中科院分区:
生物学1区
文献类型:
--
作者:
Kelley K;Knockenhauer KE;Kabachinski G;Schwartz TU

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核孔复合物(NPC)是运输进出核的主要通道。通过NPC的水凝胶样核心实现选择性。NPC的结构完整性取决于约15种结构蛋白,这些结构蛋白以不同的亚复合物组织形成>40 MDa的环状结构。在这里,我们提出了一个异源四聚体的核心元素(“枢纽”)的Y-复合物,基本的NPC积木,从嗜热毁丝霉的4.1 μ m晶体结构。使用“枢纽”结构连同已知的Y复合物片段,我们构建了整个~ 0.5MDa Y复合物。我们的数据显示,Y复合体的保守核心有6个成员,而不是7个成员。进化上遥远的Y-复合体组件共享一个保守的核心,在形状和尺寸上非常相似,这表明在所有真核生物中构建NPC有密切相关的建筑代码。
The nuclear pore complex (NPC) is the principal gateway for transport into and out of the nucleus. Selectivity is achieved through the hydrogel-like core of the NPC. The structural integrity of the NPC depends on ~15 architectural proteins, which are organized in distinct subcomplexes to form the >40 MDa ring-like structure. Here we present the 4.1 Å crystal structure of a heterotetrameric core element (‘hub’) of the Y-complex, the essential NPC building block, from Myceliophthora thermophila. Using the ‘hub’ structure together with known Y-complex fragments we built the entire ~0.5 MDa Y-complex. Our data reveal that the conserved core of the Y-complex has 6, rather than 7 members. Evolutionarily distant Y-complex assemblies share a conserved core that is very similar in shape and dimension, suggesting that there are closely related architectural codes for constructing the NPC in all eukaryotes.
DOI: 10.1016/j.molcel.2008.04.022
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