What question did this study set out to answer?

To synthesize 1,N2-etheno-2'-deoxyguanosine and characterize its chemical properties, stability, and formation rate in synthetic polynucleotides and genomic DNA.

September 1, 1992Chemical Research in Toxicology

1,N2-Ethenodeoxyguanosine: properties and formation in chloroacetaldehyde-treated polynucleotides and DNA

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To synthesize 1,N2-etheno-2'-deoxyguanosine and characterize its chemical properties, stability, and formation rate in synthetic polynucleotides and genomic DNA.
Synthesized 1,N2-etheno-2'-deoxyguanosine by reacting deoxyguanosine with chloroacetaldehyde in dimethylformamide in the presence of potassium carbonate.
Assessed pKa values, fluorescence properties, and glycosyl bond cleavage kinetics at 37 °C and pH 1.
Measured adduct yield across single- and double-stranded polynucleotides and neutral-pH-treated salmon sperm DNA.
Pure 1,N2-etheno-2'-deoxyguanosine was isolated with a 55% yield, exhibiting pKa values of 2.2 and 9.2 alongside weak fluorescence in its anionic state.
The compound demonstrated high glycosyl bond stability (half-life of 2.3 h at 37 °C and pH 1), exceeding unmodified deoxyguanosine by 10-fold and isomeric N2,3-etheno-2'-deoxyguanosine by at least 1,000-fold.
Adduct formation occurred in salmon sperm DNA at neutral pH, but double-stranded hydrogen bonding limited 1,N2-ethenoguanine yield below that of other etheno derivatives.

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Implication

In vitro study reveals the formation and stability of 1,N2-ethenodeoxyguanosine in DNA, indicating that double-helical structure hinders this adduct.

Cite This Study

Kuśmierek et al. (1992) studied this question.

synapsesocial.com/papers/6a92dd5cfa60aefc093ada2f https://doi.org/10.1021/tx00029a007

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Implication

In vitro study reveals the formation and stability of 1,N2-ethenodeoxyguanosine in DNA, indicating that double-helical structure hinders this adduct.

1,N2-Ethenodeoxyguanosine: properties and formation in chloroacetaldehyde-treated polynucleotides and DNA

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Discussion

Implication

Cite This Study

1,N2-Ethenodeoxyguanosine: properties and formation in chloroacetaldehyde-treated polynucleotides and DNA

Key Points

Discussion

Implication

Cite This Study

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