Differentiating Positional Isomers of Nucleoside Modifications by Higher-Energy Collisional Dissociation Mass Spectrometry (HCD MS)
| Autor: | Robert L. Ross, Cody M. Palumbo, Ruoxia Zhao, Peter A. Lobue, Peter A. Beal, Balasubrahmanyam Addepalli, Patrick A. Limbach, Manasses Jora, Andrew P. Burns |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
HCD fragmentation Tandem mass spectrometry Mass spectrometry 01 natural sciences Article Dissociation (chemistry) Nucleobase Analytical Chemistry Nucleoside analysis 03 medical and health sciences Medicinal and Biomolecular Chemistry Fragmentation (mass spectrometry) Isomerism Structural Biology Computational chemistry Tandem Mass Spectrometry Structural isomer LC-MS/MS Spectroscopy Ions Chromatography Liquid Positional isomers Chemistry 010401 analytical chemistry Polyatomic ion Nucleosides RNA modification DNA Fingerprinting 0104 chemical sciences 030104 developmental biology Mass spectrum Chromatography Liquid Physical Chemistry (incl. Structural) |
| Zdroj: | Journal of the American Society for Mass Spectrometry, vol 29, iss 8 |
| Popis: | The analytical identification of positional isomers (e.g., 3-, N4-, 5-methylcytidine) within the > 160 different post-transcriptional modifications found in RNA can be challenging. Conventional liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) approaches rely on chromatographic separation for accurate identification because the collision-induced dissociation (CID) mass spectra of these isomers nearly exclusively yield identical nucleobase ions (BH2+) from the same molecular ion (MH+). Here, we have explored higher-energy collisional dissociation (HCD) as an alternative fragmentation technique to generate more informative product ions that can be used to differentiate positional isomers. LC-MS/MS of modified nucleosides characterized using HCD led to the creation of structure- and HCD energy-specific fragmentation patterns that generated unique fingerprints, which can be used to identify individual positional isomers even when they cannot be separated chromatographically. While particularly useful for identifying positional isomers, the fingerprinting capabilities enabled by HCD also offer the potential to generate HPLC-independent spectral libraries for the rapid analysis of modified ribonucleosides. Graphical Abstract ᅟ. |
| Databáze: | OpenAIRE |
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