Standardization of RNA chemical mapping experiments.
Standardization of RNA chemical mapping experiments.
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DOI:
10.1021/bi5003426
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发表时间:
2014-05-20
期刊:
影响因子:
2.9
通讯作者:
Das R
中科院分区:
文献类型:
--
作者:
Kladwang W;Mann TH;Becka A;Tian S;Kim H;Yoon S;Das R
Chemical mapping experiments offer powerful information about RNA structure but currently involve ad hoc assumptions in data processing. We show that simple dilutions, referencing standards (GAGUA hairpins), and HiTRACE/MAPseeker analysis allow rigorous overmodification correction, background subtraction, and normalization for electrophoretic data and a ligation bias correction needed for accurate deep sequencing data. Comparisons across six noncoding RNAs stringently test the proposed standardization of dimethyl sulfate (DMS), 2′-OH acylation (SHAPE), and carbodiimide measurements. Identification of new signatures for extrahelical bulges and DMS “hot spot” pockets (including tRNA A58, methylated in vivo) illustrates the utility and necessity of standardization for quantitative RNA mapping.
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