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Efficient Purification and LC-MS/MS-based Assay Development for Ten-Eleven Translocation-2 5-Methylcytosine Dioxygenase
Published on: October 15, 2018
Trapping a labile adduct formed between an ortho-quinone methide and 2'-deoxycytidine
Michael P McCrane1, Emily E Weinert, Ying Lin
1Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
Abstract:
Selective oxidation by bis[(trifluoroacetoxy)iodo]benzene (BTI) provides an effective trap for quenching adducts formed reversibly between dC and an ortho-quinone methide (QM) under physiological conditions. A model adduct generated by 4-methyl-o-QM and 2'-deoxycytidine is rapidly converted by intramolecular cyclization and loss of aromaticity to a characteristic product for quantifying QM alkylation. However, BTI induces a surprising rearrangement driven by overoxidation of a derivative lacking an alkyl substituent at the 4-position of the QM.

