Ni (II).Arg-Gly-His-DNA相互作用:研究小沟结合和识别的基础
Ya-Yin Fang1, Bruce D Ray, Craig A Claussen
1Department of Chemistry, Purdue School of Science, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA.
Journal of the American Chemical Society
|April 29, 2004
概括
这项研究表明,金属是如何识别A/T丰富的DNA小沟的. Ni(II).L-Arg-Gly-His表现出比其D-Arg对应物更强的结合,并确定了特定的相互作用.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 生物有机化学 生物有机化学
背景情况:
- 识别DNA小沟对于基因调节和药物向至关重要.
- 金属具有特定DNA相互作用的潜力.
研究的目的:
- 通过Ni(II).L-Arg-Gly-His和Ni(II).D-Arg-Gly-His.研究A/T丰富的DNA位点的小沟识别.
- 阐明绑定模式和关键相互作用决定因素.
主要方法:
- 基于光的结合试验.
- 一维和二维核磁共振 (NMR) 光谱学. 一维和二维核磁共振 (NMR) 光谱学.
- 分子动力学模拟.分子动力学模拟.
主要成果:
- Ni(II).L-Arg-Gly-His与D-Arg二聚体相比,对A / T丰富的序列表现出更高的结合亲和力.
- 核磁共振检测证实了小沟与AATT核心的结合,这是通过分子间核过度调节效应 (NOE) 证明的.
- 模拟表明,His imidazole N-H,N-终端氨基和Arg侧链是通过H结合识别的关键.
结论:
- 亚格残留物的立体化学影响金属与DNA的结合亲和力.
- 特定的氨基酸残留物及其在金属中的相互作用对于选择性DNA小沟结合至关重要.
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