OH radical‐induced oxidation in nucleosides and nucleotides unraveled by tandem mass spectrometry and IRMPD spectroscopy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue ChemPhysChem Année : 2023

OH radical‐induced oxidation in nucleosides and nucleotides unraveled by tandem mass spectrometry and IRMPD spectroscopy

Yining Jiang
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  • PersonId : 1284642
Carine Clavaguéra
Suvasthika Indrajith
  • Fonction : Auteur
  • PersonId : 1284643
Chantal Houee Levin
Giel Berden
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  • PersonId : 1284645
Jos Oomens
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  • PersonId : 1284646

Résumé

OH●‐induced oxidation products of DNA nucleosides and nucleotides have been structurally characterized by collision‐induced dissociation tandem mass spectrometry (CID‐MS2) and Infrared Multiple Photon Dissociation (IRMPD) spectroscopy. CID‐MS2 results have shown that the addition of one oxygen atom occurs on the nucleobase moiety. The gas‐phase geometries of +16 mass increment products of 2’‐deoxyadenosine (dA(O)H+), 2’‐deoxyadenosine 5’‐monophosphate (dAMP(O)H+), 2’‐deoxycytidine (dC(O)H+), and 2’‐deoxycytidine 5’‐monophosphate (dCMP(O)H+) are extensively investigated by IRMPD spectroscopy and quantum‐chemical calculations. We show that a carbonyl group is formed at the C8 position after oxidation of 2’‐deoxyadenosine and its monophosphate derivative. For 2’‐deoxycytidine and its monophosphate derivative, the oxygen atom is added to the C5 position to form a C‐OH group. IRMPD spectroscopy has been employed for the first time to provide direct structural information on oxidative lesions in DNA model systems.

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Chimie
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Dates et versions

hal-04209119 , version 1 (16-09-2023)

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Yining Jiang, Carine Clavaguéra, Suvasthika Indrajith, Chantal Houee Levin, Giel Berden, et al.. OH radical‐induced oxidation in nucleosides and nucleotides unraveled by tandem mass spectrometry and IRMPD spectroscopy. ChemPhysChem, 2023, ⟨10.1002/cphc.202300534⟩. ⟨hal-04209119⟩
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