Diphenyl ether derivatives occupy the expanded binding site of cyclohexanedione compounds at the colchicine site in tubulin by movement of the αT5 loop
complex has revealed a conformationalchange in the αT5 loop. By a grid-based computational analysis of the tubulin-DAMA-colchicine binding site, we have identified a new favourable binding area in the colchicine-site that was unexplored by our lead TUB075. Thus, based on a structure-guided design, new cyclohexanedione derivatives have been synthesized and tested for tubulinbinding and in cellular assays
微管靶向剂代表了抗癌剂开发中非常活跃的舞台。特别地,正在深入研究在微管蛋白中的秋水仙碱位点结合的化合物,并且最近在该结合位点上可获得的结构信息允许新配体的结构定向设计。我们最近报道的与微管蛋白和微管蛋白-DAMA-秋水仙碱复合物结合的环己二酮衍生物TUB075的高分辨率X射线结构的结构比较显示了αT5环的构象变化。通过微管蛋白-DAMA-秋水仙碱结合位点的基于网格的计算分析,我们在秋水仙碱位点中发现了一个新的有利结合区,而我们的前导TUB075尚未对此进行探索。因此,根据结构指导设计,已经合成了新的环己二酮衍生物,并进行了微管蛋白结合和细胞分析测试。结果,我们确定了具有IC的二苯醚衍生物针对三种不同的肿瘤细胞系,大约10–40 nM处的50值和与秋水仙碱相似的微管蛋白亲和常数大约在10 7 M -1附近。如预期的那样,他们以低至0.08μM的浓度停止了G2 / M期的细胞周期进程。
Additivity of Substituent Effects in Aromatic Stacking Interactions
作者:Jungwun Hwang、Ping Li、William R. Carroll、Mark D. Smith、Perry J. Pellechia、Ken D. Shimizu
DOI:10.1021/ja504378p
日期:2014.10.8
predict SEs with an accuracy from ±0.01 to ±0.02 kcal/mol. The additive SEs were consistent with Wheeler and Houk's direct SE model. However, the indirect or polarization SE model cannot be ruled out as it shows similar levels of additivity for two to three substituent systems, which were the number of substituents in our model system. SE additivity also has practical utility as the SEs can be accurately
本研究的目的是通过实验测试静电取代基效应 (SE) 对芳烃堆积相互作用的可加性。使用可以采用偏移面对面芳香堆积几何结构的小分子模型系统评估 SE 的可加性。这些分子扭转平衡的分子内相互作用通过折叠/展开构象平衡的变化进行定量测量。检查了五种不同类型的取代基(CH3、O 、Cl、CN 和 NO2),范围从给电子到吸电子。测量了氯仿溶液中 21 个取代芳烃堆积天平和 21 个对照天平的分子内堆积相互作用的强度。观察到的稳定性趋势与添加剂 SE 一致。具体来说,附加 SE 模型可以以 ±0.01 到 ±0.02 kcal/mol 的精度预测 SE。附加 SE 与 Wheeler 和 Houk 的直接 SE 模型一致。然而,不能排除间接或极化 SE 模型,因为它显示了两到三个取代基系统的相似水平的可加性,这是我们模型系统中取代基的数量。SE 可加性也具有实际效用,因为可以准确预测 SE。这应该
Discovery of a Functional Covalent Ligand Targeting an Intrinsically Disordered Cysteine within MYC
作者:Lydia Boike、Alexander G. Cioffi、Felix C. Majewski、Jennifer Co、Nathaniel J. Henning、Michael D. Jones、Gang Liu、Jeffrey M. McKenna、John A. Tallarico、Markus Schirle、Daniel K. Nomura
DOI:10.1016/j.chembiol.2020.09.001
日期:2021.1
remained intractable to direct targeting because much of MYC is intrinsically disordered. Here, we have performed a cysteine-reactive covalent ligand screen to identify compounds that could disrupt the binding of MYC to its DNA consensus sequence in vitro and also impair MYC transcriptional activity in situ in cells. We have identified a covalent ligand, EN4, that targetscysteine 171 of MYC within a predicted
This invention relates to aryl carbonyl derivatives which are activators of glucokinase which may be useful for the management, treatment, control, or adjunct treatment of diseases, where increasing glucokinase activity is beneficial.
This invention relates to aryl carbonyl derivatives which are activators of glucokinase which may be useful for the management, treatment, control, or adjunct treatment of diseases, where increasing glucokinase activity is beneficial.