Two new 5-formyluracil thiosemicarbazone (H(3)ut) derivatives, Me-H(3)ut (1) and Me(2)-H(3)ut (2), were synthesized by reacting thiosemicarbazides, mono- and dimethylated on the aminic nitrogen, with 5-formyluracil and were subsequently characterized. These ligands, treated with copper chloride and nitrate, afforded three complexes:
5-Formyluracil is a mutagenic base formed in DNA by oxidation of the thymine methyl group. Whereas the thymine methyl group is electron donating, the formyl group is electron withdrawing, predicting increased ionization of the N-3 imino proton under physiological conditions.
International journal of radiation biology, 79(5), 341-349 (2003-08-29)
5-Formyluracil (5-foU) is a potentially mutagenic lesion of thymine produced in DNA by ionizing radiation and various chemical oxidants. The present authors reported previously that MutM, Nth and Nei in Escherichia coli removed 5-foU from DNA. The present study identified
Journal of the American Chemical Society, 127(47), 16681-16684 (2005-11-25)
We here present a novel covalently linked base pair via Schiff base formation between 5-formyluracil (fU) and 5-aminocytosine (AmC). Formation of the Schiff base linkage proceeds reversibly and does not require any additives. The cross-linked DNA is very stable under
Nucleic acids symposium series (2004), (49)(49), 185-186 (2006-12-08)
We here present a novel covalently linked base pair via Schiff base formation between 5-formyluracil (fU) and 5-aminocytosine (AmC). The formation of Schiff base remarkably increases thermal stability of the duplex DNA, whereas it completely dissociates upon heating at 90
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