期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 8, 页码 3961-3966出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010793
关键词
amination; digestion artifact; imination; LC-MS; MS; nucleoside analysis
资金
- National Science Foundation [CHE 1507357]
- National Institutes of Health [S10OD018485]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [SFB 1309-325871075, KE1943/3-1]
- Rieveschl Eminent Scholar Endowment
- University of Cincinnati
LC-MS/MS is currently the leading technique for studying RNA and its modifications. The discovery of a non-natural ribonucleoside in tRNA hydrolysate highlights the importance of minimizing artifacts during sample preparation. Optimizing digestion conditions can lead to more accurate detection of new RNA modifications.
Liquid chromatography-tandem mass spectrometry (LC-MS/MS) has become the gold-standard technique to study RNA and its various modifications. While most research on RNA nucleosides has been focused on their biological roles, discovery of new modifications remains of interest. With state-of-the-art technology, the presence of artifacts can confound the identification of new modifications. Here, we report the characterization of a non-natural mcm(5)isoC ribonucleoside in S. cerevisiae total tRNA hydrolysate by higher-energy collisional dissociation (HCD)-based fingerprints and isotope labeling of RNA. Its discovery revealed a class of amino/imino ribonucleoside artifacts that are generated during RNA hydrolysis under ammonium-buffered mild basic conditions. We then identified digestion conditions that can reduce or eliminate their formation. These finding and method enhancements will improve the accurate detection of new RNA modifications.
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