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首页> 外文期刊>Journal of Biomolecular Structure and Dynamics >Using Cross-links to Study Ribosomal Dynamics.
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Using Cross-links to Study Ribosomal Dynamics.

机译:使用交叉链接研究核糖体动力学。

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摘要

After publications of 3-D models of a static ribosome and its large and small subunits, one of the next tasks is to recognize movable ribosomal elements responsible for mechanical shifts during protein synthesis. Statistic analysis of available cross-linking data allowed us to reveal three well separated groups of motions in the ribosome: I, mean magnitude of 10A; II, most abundant, centered at 20A and of wide dispersion, and III, sparsely populated, with large distances up to 95A. The last group, III, comprises elements, like the L7/12-stalk and the L1- protuberance, that adopt different positions in crystallographic or electron micrographic structures, and neighboring hairpins 88 and 89, indicating mobility. We demonstrate that the cross-linking method can be applied to study ribosomal dynamics, including large-scale functional movements and, in particular, to estimate which structures participate in molecular switches.
机译:在公布了静态核糖体及其大小亚基的3-D模型后,下一步的任务之一是识别引起蛋白质合成过程中机械移位的活动核糖体元件。对可用交联数据的统计分析使我们能够揭示核糖体中运动的三个完全分开的组:I,平均幅度为10A; II,最丰富,集中在20A,分散范围广,III,稀疏,距离大,可达95A。最后一组,III,包括在晶体学或电子显微结构中采用不同位置的元素,如L7 / 12茎和L1突起,以及相邻的发夹88和89,指示迁移率。我们证明了交联方法可用于研究核糖体动力学,包括大规模的功能性运动,尤其是估计哪些结构参与了分子开关。

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