揭示肠道病毒68-3C蛋白酶的基质外:特异性和潜在抗性的结构基础
Vincent N Azzolino1, Ala M Shaqra1, Akbar Ali1
1Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
Viruses
|September 28, 2024
概括
肠道病毒-D68 (EV68) 蛋白酶抑制剂正在开发中,以对抗感染. 研究人员描述了EV68-3C蛋白酶基质特异性,以指导药物设计并最大限度地降低耐药性.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- 肠道病毒D68 (EV68) 是一个不断增长的全球健康威胁,导致严重的神经损伤.
- 目前没有FDA批准的抗病毒药物用于EV68或其他非脊髓灰质炎肠道病毒.
- 针对保存的EV68-3C蛋白酶活性位点的小分子抑制剂是有希望的治疗候选者.
研究的目的:
- 为了确定EV68-3C蛋白酶的基质特异性.
- 为设计有效的EV68抑制剂提供结构洞察力,以尽量减少阻力.
- 为了描述EV68-3C蛋白酶的活性位点相互作用和基质外.
主要方法:
- 分子建模和模拟以分析蛋白酶-基质相互作用.
- 分子动力学 (MD) 模拟用于研究动态构造变化.
- 进行X射线晶体学,以获得EV68-3C蛋白酶与基质的共同晶体结构.
主要成果:
- 在EV68-3C蛋白酶和病毒分裂部位之间特征保存的键网络.
- 鉴定了蛋白酶中基质诱导的构造变化,特别是在S1口袋中.
- 计算了三维基板封面,定义了基板在活性部位所占的空间.
结论:
- EV68-3C蛋白酶基质包裹的光提供了抑制剂设计的结构基础.
- 了解基质特异性和形状变化可以为开发不太容易产生耐药性的药物提供信息.
- 这项研究为开发针对EV68感染的新型抗病毒疗法奠定了基础.
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