Safer one-pot synthesis of the 'SHAPE' reagent 1-methyl-7-nitroisatoic anhydride (1m7).
Safer one-pot synthesis of the 'SHAPE' reagent 1-methyl-7-nitroisatoic anhydride (1m7).
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DOI:
10.1261/rna.042374.113
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发表时间:
2013-12
期刊:
影响因子:
--
通讯作者:
Ares M Jr
中科院分区:
文献类型:
--
作者:
Turner R;Shefer K;Ares M Jr
1-methyl-7-nitroisatoic anhydride (1m7) is a useful reagent for probing RNA structure and serves as the basis for SHAPE analysis. This paper reports a reliable safe and inexpensive method for converting the precursor (4NIA) to 1m7. This method may make SHAPE analysis available to most molecular biology laboratories. Estimating the reactivity of 2′-hydroxyl groups along an RNA chain of interest aids in the modeling of the folded RNA structure; flexible loops tend to be reactive, whereas duplex regions are generally not. Among the most useful reagents for probing 2′-hydroxyl reactivity is 1-methyl-7-nitroisatoic anhydride (1m7), but the absence of a reliable, inexpensive source has prevented widespread adoption. An existing protocol for the conversion of an inexpensive precursor 4-nitroisatoic anhydride (4NIA) recommends the use of NaH in dimethylformamide (DMF), a reagent combination that most molecular biology labs are not equipped to handle, and that does not scale safely in any case. Here we describe a safer, one-pot method for bulk conversion of 4NIA to 1m7 that reduces costs and bypasses the use of NaH. We show that 1m7 produced by this method is free of side products and can be used to probe RNA structure in vitro.
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影响因子:
14.9
作者:
Washietl S;Hofacker IL;Stadler PF;Kellis M
通讯作者:
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影响因子:
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DOI:
10.1073/pnas.1219988110
发表时间:
2013-04-02
影响因子:
11.1
作者:
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通讯作者:
Weeks, Kevin M.
影响因子:
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作者:
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