阿斯巴拉金-85稳定了Mycobacterium结核病CYP121A1中的一个结构性活跃地点水网
Christopher S Campomizzi1, Patil Pranita Uttamrao2, Jack J Stallone1
1Department of Biochemistry, Jacobs School of Medicine and Biomedical Science, University at Buffalo, Buffalo, New York 14203, United States.
Biochemistry
|February 21, 2024
概括
细胞染色体P450酶CYP121A1对于Mycobacterium结核病的生存至关重要. 通过突变破坏其活跃部位的水网络会使酶失活,从而揭示了它在药物开发中的重要性.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 结构生物学 结构生物学
背景情况:
- 在Mycobacterium tuberculosis中,P450细胞染色体CYP121A1催化了二克罗素的形成.
- 由于其至关重要的作用,CYP121A1是潜在的药物标.
研究的目的:
- 调查结和活性站点水网络在CYP121A1功能中的作用.
- 确定突变对酶活性和结构的影响.
主要方法:
- 19F 核磁共振光谱法 核磁共振光谱法
- 重建活动测定试验.
- 分子动力学模拟的模拟.
- 位点定向的突变发生 (从Asn-85转变为Ser/Gln)
主要成果:
- 突变N85S和N85Q激活了CYP121A1.1. 的活性.
- 水网的破坏改变了活性部位结构和带结合.
- 模拟显示,水网的妥协重塑了活跃地点并重新定位了基板.
结论:
- 一个稳定的活点水网对于CYP121A1功能至关重要.
- 水网络有助于酶的结构刚性.
- 针对这个网络可能是一个可行的药物策略来对抗M.结核病.
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