High-throughput mutate-map-rescue evaluates SHAPE-directed RNA structure and uncovers excited states.
High-throughput mutate-map-rescue evaluates SHAPE-directed RNA structure and uncovers excited states.
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高通量 mutate-map-rescue 评估 SHAPE 导向的 RNA 结构并揭示激发态。
DOI:
10.1261/rna.044321.114
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发表时间:
2014-11
期刊:
影响因子:
--
通讯作者:
Das R
中科院分区:
文献类型:
--
作者:
Tian S;Cordero P;Kladwang W;Das R
The three-dimensional conformations of noncoding RNAs underpin their biochemical functions but have largely eluded experimental characterization. Here, we report that integrating a classic mutation/rescue strategy with high-throughput chemical mapping enables rapid RNA structure inference with unusually strong validation. We revisit a 16S rRNA domain for which SHAPE (selective 2′-hydroxyl acylation with primer extension) and limited mutational analysis suggested a conformational change between apo- and holo-ribosome conformations. Computational support estimates, data from alternative chemical probes, and mutate-and-map (M2) experiments highlight issues of prior methodology and instead give a near-crystallographic secondary structure. Systematic interrogation of single base pairs via a high-throughput mutation/rescue approach then permits incisive validation and refinement of the M2-based secondary structure. The data further uncover the functional conformation as an excited state (20 ± 10% population) accessible via a single-nucleotide register shift. These results correct an erroneous SHAPE inference of a ribosomal conformational change, expose critical limitations of conventional structure mapping methods, and illustrate practical steps for more incisively dissecting RNA dynamic structure landscapes.
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DOI:
10.1093/bioinformatics/btp250
发表时间:
2009-08-01
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Darty K;Denise A;Ponty Y
通讯作者:
Ponty Y
影响因子:
21.8
作者:
通讯作者:
--
影响因子:
4.1
作者:
Grover, Richa;Sharathchandra, Arandkar;Das, Saumitra
通讯作者:
Das, Saumitra
影响因子:
2.9
作者:
Kladwang W;Mann TH;Becka A;Tian S;Kim H;Yoon S;Das R
通讯作者:
Das R
影响因子:
2.9
作者:
Kladwang, Wipapat;Das, Rhiju
通讯作者:
Das, Rhiju