peroxodisulfate ion in a phosphate buffer solution at pH 7.0 or water at 70—75 °C was investigated. The reaction of thymine and 5-methylcytosine nucleosides and nucleotides resulted in the oxidation of the 5-methyl groups. The oxidation products from 1,3-dimethyluracils and the time-course of the reaction of uracils led to two plausible reaction mechanisms for the oxidation of uracils.
研究了在 pH 7.0 的磷酸盐缓冲溶液或 70-75 °C 的水中用过二硫酸根离子处理核酸碱基、核苷和核苷酸。胸腺嘧啶和 5-甲基胞嘧啶核苷和核苷酸的反应导致 5-甲基基团的氧化。1,3-二甲基尿嘧啶的氧化产物和尿嘧啶反应的时间进程导致了两种可能的尿嘧啶氧化反应机制。
Thymidine radical formation via one-electron transfer oxidation photoinduced by pterin: Mechanism and products characterization
作者:Mariana P. Serrano、Mariana Vignoni、Carolina Lorente、Patricia Vicendo、Esther Oliveros、Andrés H. Thomas
DOI:10.1016/j.freeradbiomed.2016.04.196
日期:2016.7
UV-A radiation (320-400nm), recognized as a class I carcinogen, induces damage to the DNA molecule and its components through different mechanisms. Pterin derivatives are involved in various biological functions, including enzymatic processes, and it has been demonstrated that oxidized pterins may act as photosensitizers. In particular, they accumulate in the skin of patients suffering from vitiligo
Oxime and dithiolane derivatives of 5-formyl-2'-deoxyuridine and their 5'-phosphates: antivirial effects and thymidylate synthetase inhibition
作者:Joon Sup Park、Charles T. C. Chang、Charles L. Schmidt、Yechiel Golander、Erik De Clercq、Johan Descamps、Mathias P. Mertes
DOI:10.1021/jm00180a016
日期:1980.6
2a in inhibitingthymidylatesynthetase in vivo (as reflected by a differential inhibition of dThd and dUrd incorporation into host cell DNA). The dithiolane (4a) did not exert an appreciable effect on either virus multiplication or dThd or dUrd incorporation, nor was it cytotoxic. All these compounds as their 5'-phosphate derivatives were potent in vitro inhibitors of thymidylatesynthetase (Lactobacillus