通过小分子模拟来激活VCP的Allosteric激活,一个AAA解酶,小分子模拟
Natalie H Jones1,2, Qiwen Liu1, Linas Urnavicius1
1Laboratory of Chemistry and Cell Biology, The Rockefeller University, New York, NY 10065.
研究人员发现了一种新型的激活剂,VAA1,用于AAA酶氨酸含蛋白 (VCP). 这种小分子准了全位,为VCP调节提供了一个新的机制,以及针对相关疾病的潜在治疗策略.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 分子医学是分子医学.
背景情况:
- 在AAA (与多种细胞活动相关的ATPase) 机能酶中的功能丧失突变,如含有瓦洛的蛋白质 (VCP) / p97,与蛋白质聚合障碍有关.
- 了解小分子如何激活AAA蛋白对于开发治疗策略至关重要,但机制在很大程度上仍然未知.
研究的目的:
- 为了确定VCP/p97.7.的小分子激活剂的可用药物的部位.
- 阐明小分子激活VCP/p97.97.的机制.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于在apo和ADP-bound状态下确定VCP结构.
- 生化分析测量VCP ATPase活动.
- 位点定向的突变发生检测VAA1结合位点及其功能影响.
主要成果:
- 鉴定VCP ATPase激活剂1 (VAA1),一种增强VCP ATPase活性高达三倍的化合物.
- 冷-EM结构显示VAA1与VCP C端附近的全囊结合.
- 在VAA1结合部位的突变赋予VAA1耐药性和调节的VCP活性,表明VAA1模仿了内源性调节相互作用.
结论:
- 在VCP上发现了可用于小分子激活的可用药物的全位.
- 通过小分子模拟内源相互作用来证明VCP激活的机制.
- VAA1及其结合部位代表了在疾病背景下调节VCP活性的潜在目标.
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