在HDAC8主动站点中的金属偏好层次:DFT研究
Nikolay Toshev1, Diana Cheshmedzhieva2, Yordanka Uzunova1,3
1Department of Bioorganic Chemistry, Faculty of Pharmacy, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria.
Molecules (Basel, Switzerland)
|January 28, 2026
概括
(Zn2+) 是素脱乙酶8 (HDAC8) 的首选金属辅因子. 计算研究揭示了其优越的结合亲和力比其他离子,如Fe2+,Co2+,Ni2+和Mg2+.
科学领域:
- 生物化学 生物化学
- 计算化学计算化学
- 酶学 是一种酶学.
背景情况:
- 海斯脱乙酶8 (HDAC8) 涉及到各种人类疾病.
- HDAC8是一种依赖Zn2+的金属酶,但其与其他金属离子的相互作用尚不清楚.
- 了解金属离子选择性对于HDAC8抑制剂设计至关重要.
研究的目的:
- 调查生物相关金属离子 (Fe2+,Ni2+,Co2+,Mg2+) 对HDAC8活性部位的结合亲和力.
- 阐明金属离子与Zn2+竞争的机制.
- 为了建立HDAC8.8的内在金属偏好层次.
主要方法:
- 在B3LYP/6-31+G(d) 层面的密度函数理论 (DFT) 计算.
- 在水溶液和甲醇溶液中进行极化连续模型 (PCM) 计算.
- 金属离子替代反应的热力学分析.
主要成果:
- Zn2+ 始终是 HDAC8.8 的热力学偏好的辅因子.
- Fe2+和Co2+显示出有限的稳定性,但由于和溶解处罚,它们被Zn2+所超越.
- Ni2+和Mg2+表现出不利的结合,Mg2+强烈排除在外.
- 已建立的金属偏好等级: Zn2+ > Co2+ ≈ Fe2+ > Ni2+ > Mg2+.
结论:
- HDAC8对Zn2+具有与其他测试的金属离子相比的内在选择性.
- 这些发现澄清了HDAC8金属调节机制.
- 为设计向的HDAC8抑制剂提供了分子基础.
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