氧醇的化影响ImHpPyPy-beta-Dp聚胺与DNA的结合
Bernd Wellenzohn1, Markus J Loferer, Michael Trieb
1Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria.
Journal of the American Chemical Society
|January 23, 2003
概括
一种新型的聚胺配体 (ImHpPyPy-beta-Dp) 可以识别小沟中的特定DNA序列,这是药物设计的突破. 然而,它的基组降低了DNA结合亲和力,这一发现得到了自由能量计算的证实.
科学领域:
- 药用化学 医学化学
- 分子生物学分子生物学
- 计算化学计算化学
背景情况:
- 特定的DNA序列识别对于开发转录控制药物至关重要.
- 聚胺联体因其DNA结合能力而受到研究.
- 以前的理解表明,DNA序列识别主要发生在主要槽中.
研究的目的:
- 为了研究基基对聚胺-DNA结合亲和力的影响.
- 阐明实验观察到的减少结合常数的结构基础.
- 探索通过聚胺联体对DNA序列歧视的机制.
主要方法:
- 使用热力学集成的自由能量计算.
- 分子动力学 (MD) 模拟.分子动力学 (MD) 模拟.
- 与实验数据和X射线晶体学进行比较.
主要成果:
- 根据计算,基组将DNA结合减少约1.3kcal/mol,与实验值 (1.2kcal/mol) 保持一致.
- MD模拟显示了连接体-DNA复合体之间的最小结构差异,与X射线结构的解释形成鲜明对比.
- 在未结合状态下对连接体的差水化被认为是减少结合常数的原因.
结论:
- 基对结合亲和力的影响是定量确定.
- 对联结体-DNA复合体之间观察到的差异的结构解释可能需要修订.
- 间接DNA读取机制,涉及基对延长,被建议用于序列分化.
相关概念视频
01:01Phosphodiester Linkages
Overview
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
Phosphodiester bond forms when a phosphoric acid molecule (H3PO4) links with two hydroxyl groups (–OH) of two other molecules, forming two ester bonds. Two water molecules are released in this process. The phosphodiester bond is commonly found in nucleic acids (DNA and RNA) and plays a critical role in their structure and function.
Phosphodiester Bonds Link Nucleotides Together
DNA and RNA are polynucleotides or long chains of nucleotides that are linked together. A nucleotide is...
02:27DNA Base Pairing
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
01:25Nucleic Acid Structure
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...