Journal
NATURE CHEMICAL BIOLOGY
Volume 2, Issue 7, Pages 365-366Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nchembio796
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Funding
- CDMRP [545653, CA110261] Funding Source: Federal RePORTER
- NCI NIH HHS [CA110261, CA026731] Funding Source: Medline
- NIEHS NIH HHS [ES002109] Funding Source: Medline
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Guanine in DNA is a major oxidation target owing to its low ionization potential (IP), and there is often an inverse correlation between damage frequency and sequence-dependent variation in guanine IP. We report that the biological oxidant nitrosoperoxycarbonate (ONOOCO2-) paradoxically selects guanines with the highest IP in GC-containing contexts. Along with sequence-dependent variation in damage chemistry, this behavior points to factors other than charge migration as determinants of genomic DNA oxidation.
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