Tubulin photoaffinity labeling study with a plinabulin chemical probe possessing a biotin tag at the oxazole
作者:Yuri Yamazaki、Yui Kido、Koushi Hidaka、Hiroyuki Yasui、Yoshiaki Kiso、Fumika Yakushiji、Yoshio Hayashi
DOI:10.1016/j.bmc.2010.10.055
日期:2011.1
cytotoxicity against an HT-29 cells. A photoaffinity labeling study suggested that probe 4 specifically recognizes tubulin at a binding site that binds plinabulin or colchicine, most likely near or at the colchicine binding site, which is located at the interfacial region formed by α-and β-tubulin association. The results also demonstrated that probe 4 may serve as a useful plinabulin chemical probe to investigate
通过Cu I催化的Huisgen的环加成反应合成了一种新的具有生物活性的光亲和探针KPU-252-B1(4),该探针在强大的纤丝素衍生物KPU-244(2)的恶唑环上具有生物素标签。微管蛋白上的基于二酮哌嗪的抗微管剂匹林布林。探针4显示出对微管蛋白的显着结合亲和力和对HT-29细胞的细胞毒性。光亲和标记研究表明探针4特异性识别微管蛋白在结合纤毛蛋白或秋水仙碱的结合位点,最有可能在秋水仙碱结合位点附近或在其上,该位点位于由α-和β-微管蛋白缔合形成的界面区域。结果还表明,探针4可以用作有用的纤毛蛋白化学探针,以研究抗微管二酮哌嗪衍生物发挥作用的分子机理。