MDM2的定量盖动力学揭示了p53结合裂的差异性连接体结合模式
Scott A Showalter1, Lei Bruschweiler-Li, Eric Johnson
1Department of Chemistry and Biochemistry, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA.
Journal of the American Chemical Society
|April 26, 2008
概括
在MDM2上的coprotein.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- 瘤蛋白MDM2与p53瘤抑制剂相互作用,调节其活性和稳定性.
- MDM2的N端盖对于p53调节至关重要,但由于其灵活性,其在配体结合中的作用尚不清楚.
研究的目的:
- 为了研究MDM2 N-终端盖的动力学在存在和缺失的连接体.
- 确定MDM2盖的动态如何区分p53结合和小分子对抗剂结合.
主要方法:
- 使用核磁共振 (NMR) 光谱学的定量动力学研究.
- 对与p53或小分子对手nutlin-3结合的apo-MDM2和MDM2的分析.
主要成果:
- Apo-MDM2 主要存在于一个封闭的盖子状态,在p53结合时相互转换为一个灵活的开放状态.
- 小分子nutlin-3与MDM2裂结合,而不会显著改变闭盖状态.
- MDM2盖的动力学作为不同的连接体相互作用的区分签名.
结论:
- 对于区分p53结合和小分子对抗剂结合而言,MDM2盖的动态非常重要.
- 盖膜动态可以作为选签名用于开发针对p53-MDM2相互作用的新型治疗抗剂.
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