Crystallography-guided discovery of carbazole-based retinoic acid-related orphan receptor gamma-t (RORγt) modulators: insights into different protein behaviors with “short” and “long” inverse agonists
作者:Ming-cheng Yu、Feng Yang、Xiao-yu Ding、Nan-nan Sun、Zheng-yuan Jiang、Ya-fei Huang、Yu-rong Yan、Chen Zhu、Qiong Xie、Zhi-feng Chen、Si-qi Guo、Hua-liang Jiang、Kai-xian Chen、Cheng Luo、Xiao-min Luo、Shi-jie Chen、Yong-hui Wang
DOI:10.1038/s41401-020-00552-w
日期:2021.9
complexed with the representative “short” inverse agonist 6 (PDB: 6LOB), the agonist 7d (PDB: 6LOA) and the “long” inverse agonist 7h (PDB: 6LO9) were revealed by X-ray analysis. However, minor differences were found in the binding modes of “short” inverse agonist 6 and “long” inverse agonist 7h. To further reveal the molecular mechanisms of different RORγt inverse agonists, we performed molecular dynamics
在“短”反向激动剂的晶体学特征的指导下,通过 6 位修饰发现了一系列基于 6 位取代的咔唑的视黄酸相关孤儿受体 γ-t (RORγt) 调节剂6 。随着6位取代基尺寸的增加,“短”反向激动剂6首先将其功能反转为激动剂,然后反转为“长”反向激动剂。通过X射线分析揭示了RORγt与代表性“短”反向激动剂6 (PDB:6LOB)、激动剂7d (PDB:6LOA)和“长”反向激动剂7h (PDB:6LO9)复合的共晶结构。然而,“短”反向激动剂6和“长”反向激动剂7h的结合模式存在微小差异。为了进一步揭示不同RORγt反向激动剂的分子机制,我们进行了分子动力学模拟,发现“短”或“长”反向激动剂导致RORγt螺旋H11、H11'和H12的不同行为。 “短”反向激动剂6使 H11' 不稳定并使 H12 脱位,而“长”反向激动剂7h分离H11 并使 H12 解旋。结果表明,两种类型的反向激动剂在下游信号