Microtubule's conformational cap

Microtubule's conformational cap
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DOI:
10.1247/csf.24.299
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发表时间:
1999-10-01
影响因子:
1.5
通讯作者:
Flyvbjerg, H
Flyvbjerg, H
中科院分区:
生物学4区
文献类型:
--
作者:
Chrétien, D;Jánosi, I;Flyvbjerg, H

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使不稳定的微管晶格伸长的分子机制仍不清楚。通常认为,GDP配体的微管蛋白晶格被一小层GTP或GDP-P-1配体的分子所覆盖,即所谓的“GTP帽”。在这里,我们指出,弹性特性的微管晶格之间的稳定性的差异,导致伸长的微管蛋白片和完整的微管壁。我们的观察微管结构和动力学的影响进行了讨论。
The molecular mechanisms that allow elongation of the unstable microtubule lattice remain unclear. It is usually thought that the GDP-liganded tubulin lattice is capped by a small layer of GTP- or GDP-P-i-liganded molecules, the so called "GTP-cap". Here, we point-out that the elastic properties of the microtubule lattice cause a difference in stability between the elongating tubulin sheet and the completed microtubule wall. The implications of our observations for microtubule structure and dynamics are discussed.