Title: Synthesis of DNA Oligodeoxynucleotides Containing Site-Specific 1,3-Butadiene-Deoxyadenosine Lesions.
Authors: Wickramaratne, Susith; Seiler, Christopher L; Tretyakova, Natalia Y
Published In Curr Protoc Nucleic Acid Chem, (2015 Jun 03)
Abstract: Post-oligomerization synthesis is a useful technique for preparing site-specifically modified DNA oligomers. This approach involves site-specific incorporation of inherently reactive halogenated nucleobases into DNA strands using standard solid-phase synthesis, followed by post-oligomerization nucleophilic aromatic substitution (SNAr) reactions with carcinogen-derived synthons. In these reactions, the inherent reactivities of DNA and carcinogen-derived species are reversed: the modified DNA nucleobase acts as an electrophile, while the carcinogen-derived species acts as a nucleophile. In the present protocol, we describe the use of the post-oligomerization approach to prepare DNA strands containing site- and stereospecific N6-adenine and N1,N6-adenine adducts induced by epoxide metabolites of the known human and animal carcinogen 1,3-butadiene (BD). The resulting oligomers containing site-specific, structurally defined DNA adducts can be used in structural and biological studies to reveal the roles of specific BD adducts in carcinogenesis and mutagenesis.
PubMed ID: 26344227
MeSH Terms: Adenine/chemistry; Butadienes/chemistry; DNA Adducts/chemistry*; Oligodeoxyribonucleotides/chemistry*