Synthesis of site-specific crown ether adducts to DNA abasic sites: 8-Oxo-7,8-Dihydro-2′-Deoxyguanosine and 2′-Deoxycytidine

Abstract

Formation of adducts to DNA is of great benefit to DNA sequencing and damage detection technology and to enzymology. Here we describe the synthesis and characterization procedures of 18-crown-6 adducts formed to abasic (AP) sites, 8-oxo-7,8-dihydro-2′-deoxyguanosine (OG), and 2′-deoxycytidine (C) residues in DNA oligodeoxynucleotides. These crown ether adducts were used as site-specific modifications to facilitate nanopore technology. The methods described can be readily expanded to attach other suitable primary amines of interest.