Crystal structure of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) frameshifting pseudoknot.

Crystal structure of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) frameshifting pseudoknot.
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DOI:
10.1261/rna.078825.121
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发表时间:
2022-03
期刊:
RNA (New York, N.Y.)
影响因子:
--
通讯作者:
Ferré-D'Amaré AR
Ferré-D'Amaré AR
中科院分区:
其他
文献类型:
--
作者:
Jones CP;Ferré-D'Amaré AR

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SARS-CoV-2利用高度保守的RNA假结从一个开放阅读框产生两个长的病毒蛋白前体,该假结增强了程序化的-1核糖体移码。假结的1.3倍分辨率的X射线结构揭示了三个同轴堆叠的螺旋,由来自环残基的特异性碱基三联体支撑。这种结构代表了一种移码刺激状态,它必须被核糖体变形,并显示出碱基三重相邻口袋,这可能是未来小分子治疗的目标。
SARS-CoV-2 produces two long viral protein precursors from one open reading frame using a highly conserved RNA pseudoknot that enhances programmed −1 ribosomal frameshifting. The 1.3 Å-resolution X-ray structure of the pseudoknot reveals three coaxially stacked helices buttressed by idiosyncratic base triples from loop residues. This structure represents a frameshift-stimulating state that must be deformed by the ribosome and exhibits base-triple-adjacent pockets that could be targeted by future small-molecule therapeutics.
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