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Synthesis of DNA oligodeoxynucleotides containing structurally defined N6-(2-hydroxy-3-buten-1-yl)-adenine adducts of 3,4-epoxy-1-butene. 2007

Danaè Quirk Dorr, and Kristopher Murphy, and Natalia Tretyakova
Department of Medicinal Chemistry and The Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.

3,4-Epoxy-1-butene (EB) is generated by cytochrome P450-mediated epoxidation of 1,3-butadiene (BD), an important environmental and industrial chemical classified as a probable human carcinogen. The ability of EB to induce point mutations at GC and AT base pairs has been attributed to its reactions with DNA to form covalent nucleobase adducts. Guanine alkylation is preferred at the endocyclic N7 nitrogen, while adenine can be modified at the N1-, N3-, N7-, and the N6 positions. For each of these sites, a pair of regioisomeric 2-hydroxy-3-buten-1-yl and 1-hydroxy-3-buten-2-yl adducts is produced as a result of epoxide ring opening at the terminal C-4 or the internal C-3 carbon position of EB, respectively. The N6-EB-adenine adducts are of particular interest because of their stability in DNA, potentially leading to their accumulation in vivo. In the present work, synthetic DNA oligomers containing structurally defined N6-(2-hydroxy-3-buten-1-yl)-dA (N6-HB-dA) adducts were prepared for the first time by a postoligomerization approach that involved coupling 6-chloropurine-containing DNA with synthetic 1-amino-3-buten-2-ol. N6-HB-dA-containing DNA oligomers were isolated by reversed phase HPLC, and the presence of N6-HB-dA in their structure was confirmed by molecular weight determination from HPLC-ESI- -MS of the intact strands and by HPLC-ESI+-MS/MS and MS/MS/MS analyses of the enzymatic digests using synthetic N6-HB-dA as an authentic standard. N6-HB-dA-containing oligomers generated in this study will be used for structural and biological studies.

UI MeSH Term Description Entries
D009682 Magnetic Resonance Spectroscopy Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING). In Vivo NMR Spectroscopy,MR Spectroscopy,Magnetic Resonance,NMR Spectroscopy,NMR Spectroscopy, In Vivo,Nuclear Magnetic Resonance,Spectroscopy, Magnetic Resonance,Spectroscopy, NMR,Spectroscopy, Nuclear Magnetic Resonance,Magnetic Resonance Spectroscopies,Magnetic Resonance, Nuclear,NMR Spectroscopies,Resonance Spectroscopy, Magnetic,Resonance, Magnetic,Resonance, Nuclear Magnetic,Spectroscopies, NMR,Spectroscopy, MR
D009838 Oligodeoxyribonucleotides A group of deoxyribonucleotides (up to 12) in which the phosphate residues of each deoxyribonucleotide act as bridges in forming diester linkages between the deoxyribose moieties. Oligodeoxynucleotide,Oligodeoxyribonucleotide,Oligodeoxynucleotides
D012015 Reference Standards A basis of value established for the measure of quantity, weight, extent or quality, e.g. weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy. Standard Preparations,Standards, Reference,Preparations, Standard,Standardization,Standards,Preparation, Standard,Reference Standard,Standard Preparation,Standard, Reference
D002851 Chromatography, High Pressure Liquid Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D004247 DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D004852 Epoxy Compounds Organic compounds that include a cyclic ether with three ring atoms in their structure. They are commonly used as precursors for POLYMERS such as EPOXY RESINS. Epoxide,Epoxides,Epoxy Compound,Oxiranes,Compound, Epoxy,Compounds, Epoxy
D006868 Hydrolysis The process of cleaving a chemical compound by the addition of a molecule of water.
D000225 Adenine A purine base and a fundamental unit of ADENINE NUCLEOTIDES. Vitamin B 4,4, Vitamin B,B 4, Vitamin
D018736 DNA Adducts The products of chemical reactions that result in the addition of extraneous chemical groups to DNA. DNA Adduct,Adduct, DNA,Adducts, DNA
D021241 Spectrometry, Mass, Electrospray Ionization A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry. ESI Mass Spectrometry,Electrospray Ionization Mass Spectrometry,Mass Spectrometry, ESI,Spectrometry, ESI Mass

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