循环介导激素诱导激活干扰素基因蛋白的刺激器
Rui Li1,2, Lin Chen2, Xinheng He2,3
1School of Pharmacy, China Pharmaceutical University, 639 Longmian Road, Nanjing 211198, China.
Journal of chemical information and modeling
|October 13, 2023
概括
分子动力学模拟揭示了STING激动剂如何通过结合STING和TBK1.1来激活免疫反应. 关键的STING区域,特别是环α5,对于这种全激活至关重要,指导未来的癌症药物开发.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 计算化学的计算化学
背景情况:
- 干扰素基因刺激器 (STING) 是癌症免疫治疗的关键目标.
- 刺激活通过招募坦克结合激酶1 (TBK1) 来启动免疫反应.
- 激动剂对STING-TBK1相互作用调节的精确分子机制尚未完全理解.
研究的目的:
- 阐明激素介导的STING-TBK1相互作用的分子机制.
- 为了确定参与全激活的STING的关键结构元素.
- 为开发针对STING的新型癌症疗法提供见解.
主要方法:
- 对STING和TBK的分子动力学 (MD) 模拟1.
- 在激动剂结合时对形状变化的分析.
- 对于STING激动剂的自由能量扰动 (FEP) 计算.
主要成果:
- MD模拟显示,STING螺旋 (α5-α7) 和循环 (循环6,循环8,C端尾) 调解STING-TBK1相互作用.
- 螺旋α5被确定为激动剂诱导的STING激活的关键区域.
- FEP的计算表明,向α5的基基基组是激素活性的关键决定因素.
结论:
- 激素结合会诱导STING中的全形状变化,促进TBK1的招募.
- α5螺旋对于激动剂的STING激活是必不可少的.
- 这些发现为设计用于癌症治疗的强有力的STING激动剂提供了机制基础.
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