Pyrrole-Based Antitubulin Agents: Two Distinct Binding Modalities Are Predicted for C-2 Analogues in the Colchicine Site
作者:Chenxiao Da、Nakul Telang、Peter Barelli、Xin Jia、John T. Gupton、Susan L. Mooberry、Glen E. Kellogg
DOI:10.1021/ml200217u
日期:2012.1.12
basis of colchicine binding to tubulin. The binding mode of higher activity compounds is buried deeper in the site and overlaps well with rings A and C of colchicine, while the lower activity binding mode shows fewer critical contacts with tubulin. The model distinguishes highly active compounds from those with weaker activities and provides novel insights into the colchicine site and compound design
3,5-二溴-4-(3,4-二甲氧基苯基)-1H-吡咯-2-羧酸乙酯是一种有前景的抗微管蛋白铅剂,其靶向微管蛋白的秋水仙碱位点。合成C-2类似物并测试其微管解聚和抗增殖活性。分子模型研究同时使用GOLD对接和HINT(Hydropathic INTeraction)评分,揭示了两种不同的结合模式,这些模式解释了结构-活性关系,并且符合秋水仙碱与微管蛋白结合的结构基础。较高活性化合物的结合模式埋在该位点的更深处,并与秋水仙碱的A和C环很好地重叠,而较低活性的结合模式显示出与微管蛋白的临界接触较少。