药物gemcitabine和核基中的分子内与分子间结合:一项计算研究
Natarajan Sathiyamoorthy Venkataramanan1, Ambigapathy Suvitha2, Ryoji Sahara3
1Department of Chemistry, School of Engineering, Dayanada Sagar University, Bangalore 562 112, India.
这项研究揭示了citabine (一种化疗药物) 与核基形成稳定的复合体,主要是通过键. 关氨酸形成了最强的键,表明了潜在的药物-DNA相互作用.
科学领域:
- 计算化学是一种计算化学.
- 分子建模分子建模
- 药物与核基相互作用
背景情况:
- 吉姆西塔是一种广泛使用的化疗药物.
- 了解药物核基相互作用对于药物设计和预测疗效至关重要.
- 核基 (DNA/RNA组件) 是药物潜在的结合点.
研究的目的:
- 为了研究凝胺在核基上吸附的过程.
- 为了确定首选的结合配置和相互作用强度.
- 为了阐明这些复合体中化学结合的性质.
主要方法:
- 分散校正密度函数理论 (DFT) 的计算.
- 结合和相互作用能量的分析.
- 量子化学分析包括MESP,QTAIM,HOMA和NICS等.
- 能量分解分析 (DLPNO-CCSD(T)).
主要成果:
- 平面的gemcitabine-nucleobase复合体比堆叠或扣扣的配置更稳定.
- 复杂的形成是一个由力驱动的过程,由至少两个分子间键稳定.
- 结合金citabine-guanine的结合最强,而结合金citabine-thymine的结合最弱.
- 分子间NH⋅⋅⋅N键特别强,具有部分共价性质.
- 静电吸引力是主要的力量,分散起到最小的作用.
结论:
- 吉姆西塔可以与核基形成稳定的复合体,强度各不相同.
- 这些相互作用主要由键和静电力控制.
- 这些发现为gemcitabine的作用机制和与遗传物质的潜在相互作用提供了洞察力.
更多相关视频
10:26Profiling Ubiquitin and Ubiquitin-like Dependent Post-translational Modifications and Identification of Significant Alterations
Published on: November 7, 2019
10:05Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC Crosslinking of Small Molecules to Isolate Chromatin
Published on: January 20, 2016
相关概念视频
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
DNA Base Pairing
Drug-Receptor Bonds
In...
Intermolecular vs Intramolecular Forces
Noncovalent Attractions in Biomolecules
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Drugs that Stabilize Microtubules
