Johnson N P, Macquet J P, Wiebers J L, Monsarrat B
Nucleic Acids Res. 1982 Sep 11;10(17):5255-71. doi: 10.1093/nar/10.17.5255.
The products of the reaction between [Pt(dien)Cl]Cl and salmon sperm DNA have been purified and their structures determined. [Pt(dien)Cl]Cl binds at the N7 position of guanine for levels of fixation below 0.1 platinum per DNA base. Above this level of binding, [Pt(dien)Cl]Cl also reacts at the N7 position of adenine. 1,7-[Pt(dien)]2Ade was observed when more than 0.3 platinum per base were bound to the DNA. Platination at the N7 position of guanosine, unlike alkylation, stabilized the glycosyl linkage and did not lead to fission of the imidazole ring at high pH.
已对[Pt(dien)Cl]Cl与鲑鱼精DNA反应的产物进行了纯化并确定了其结构。对于每个DNA碱基的铂固定水平低于0.1时,[Pt(dien)Cl]Cl在鸟嘌呤的N7位结合。高于此结合水平时,[Pt(dien)Cl]Cl也会在腺嘌呤的N7位发生反应。当每个碱基有超过0.3的铂与DNA结合时,观察到了1,7-[Pt(dien)]2Ade。与烷基化不同,鸟苷N7位的铂化稳定了糖苷键,并且在高pH值下不会导致咪唑环的裂解。