Ultraslow Domain Motions in HIV-1 TAR RNA Revealed by Solid-State Deuterium NMR.

Ultraslow Domain Motions in HIV-1 TAR RNA Revealed by Solid-State Deuterium NMR.
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DOI:
10.1021/acs.jpcb.6b11041
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发表时间:
2017-01-12
期刊:
The journal of physical chemistry. B
影响因子:
--
通讯作者:
Drobny GP
Drobny GP
中科院分区:
其他
文献类型:
--
作者:
Huang W;Emani PS;Varani G;Drobny GP

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固有运动允许HIV-1 TAR RNA改变其构象,与Tat蛋白形成功能复合体,这是病毒复制所必需的。要了解焦油的动力学性质,就必须在中间的ns-μS时间尺度上测定运动。为此,我们进行了固态氘核磁共振线形和T1Z驰豫时间实验,以测量两个尿苷残基U40和U42在TAR下螺旋中的中间运动。我们推断,在下螺旋中,全球运动的速率为~10~5 S−1,这比上螺旋的速度慢得多,表明在固态样品中,两个螺旋域相互独立地重新定向。这些结果有助于全面描述TAR RNA中功能运动的特性。如果你要把论文提交给一份需要摘要的期刊,请提供一句话的提纲,以便收录在目录中。如果您要将论文提交给需要摘要的期刊,请参阅该期刊的作者说明以了解详细信息。
Intrinsic motions allow HIV-1 TAR RNA to change its conformation to form a functional complex with the Tat protein, which is essential for viral replication. Understanding of the dynamic properties of TAR necessitates determining motion on the intermediate ns-μs time scale. To this end, we performed solid-state deuterium NMR line shape and T1Z relaxation time experiments to measure intermediate motions for two uridine residues, U40 and U42, within the lower helix of TAR. We infer global motions at rates of ~105 s−1 in the lower helix, which are much slower than those of the upper helix, indicating the two helical domains reorient independently of one another in the solid-state sample. These results contribute to the aim of fully describing the properties of functional motions in TAR RNA. If you are submitting your paper to a journal that requires a brief, provide a one-sentence synopsis for inclusion in the Table of Contents. If you are submitting your paper to a journal that requires a synopsis, see the journal’s Instructions for Authors for details.
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