Structural dynamics of the ribosome.

Structural dynamics of the ribosome.
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DOI:
10.1016/j.cbpa.2008.08.037
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发表时间:
2008-12
影响因子:
7.8
通讯作者:
Noller, Harry F.
Noller, Harry F.
中科院分区:
生物学2区
文献类型:
--
作者:
Korostelev, Andrei;Ermolenko, Dmitri N.;Noller, Harry F.

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蛋白质合成本质上是一个动态过程,需要tRNA和mRNA的小范围和大规模运动。长期以来,人们一直怀疑这些运动可能与核糖体,特别是其RNA部分的构象变化有关。最近,核糖体结构动力学的本质已经开始从多种方法的结合中出现,最著名的是冷冻电镜,x射线晶体学和FRET。核糖体的运动既发生在大范围内,如与tRNA-mRNA易位相结合的亚基间旋转运动,也发生在复杂的局部重排中,如伴随密码子-反密码子识别和肽键形成的重排。尽管取得了很大的进展,但我们对翻译机制的理解现在仍受到无数新问题的困扰,这些问题反映了核糖体本身庞大的分子结构。
Protein synthesis is inherently a dynamic process, requiring both small- and large-scale movements of tRNA and mRNA. It has long been suspected that these movements might be coupled to conformational changes in the ribosome, and in its RNA moieties in particular. Recently, the nature of ribosome structural dynamics has begun to emerge from a combination of approaches, most notably cryo-EM, X-ray crystallography and FRET. Ribosome movement occurs both on a grand scale, as in the intersubunit rotational movements that are coupled to tRNA-mRNA translocation, and in intricate localized rearrangements such as those that accompany codon-anticodon recognition and peptide bond formation. In spite of much progress, our understanding of the mechanics of translation is now beset with countless new questions, reflecting the vast molecular architecture of the ribosome itself.
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发表时间: 2008-08-14
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