与氧化类似物 (cis-1,3-DACH) PtCl2 的DNA模型的相互作用
Alessandra Barbanente1, Paride Papadia2, Anna Maria Di Cosola1
1Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy.
International journal of molecular sciences
|July 13, 2024
概括
这项研究揭示了庞大的cis-1,3-diaminocyclohexane连接体如何影响-DNA附加物形成和立体化学. 这种载体连接体是载体连接体.
科学领域:
- 药用化学 医学化学
- 生物有机化学 生物有机化学
- DNA损伤和修复的过程
背景情况:
- 基于的化疗剂向DNA,其中关氨酸残留物是主要向.
- -DNA添加物的构造会影响它们的抗瘤活性.
- 载体连接体在调节-DNA添加物的特性方面发挥着至关重要的作用.
研究的目的:
- 为了研究cis-1,3-diaminocyclohexane (cis-1,3-DACH) 连接体对-瓜DNA添加物的形成,稳定性和立体化学的影响.
- 为了比较cis-1,3-DACH连接体与cis-胺连接体的作用.
主要方法:
- (cis-1,3-DACH) PtG2和 (cis-1,3-DACH) Pt(d(GpG)) 引证的合成和表征.
- 光谱分析,包括循环二元化 (CD) 和核过度调节效应 (NOE).
- 金DNA添加物的构成分析.
主要成果:
- 在 (cis-1,3-DACH) Pt(5'GMP) 2 和 (cis-1,3-DACH) Pt(3'GMP) 2 提取物中,cis-1,3-DACH 带诱导了特定的构造 (ΛHT 和 ∆HT).
- 增加的CD信号强度表明cis-1,3-DACH的咬角比cis-(NH3) 2.2.更大.
- (cis-1,3-DACH) Pt(d(GpG)) 附加物存在于两个异构体中,主要存在于HH适配体中,有一些 ΔHT 贡献.
结论:
- 晶体-1,3-DACH连接体的硬体体积和不对称性显著影响金-DNA adduct 立体化学.
- 与cis-1,3-DACH合体相比,cis-1,3-DACH合体在与cis-NH3) 2.2.2相比,在金-瓜添加物上提供了明显的构造控制.
- 了解这些形状偏好对于设计基于的新型抗癌药物至关重要.
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