related to tumor-promoting activity. Az-A-1 (15) and two epimers of Az-C7 (11a, 11b) were approximately 10 to 100-fold more active than (−)-indolactum-V(1), the fundamental structure of teleocidins. Synthesis of the 3H-labeled probes with specific activity of more than 40Ci/mmol was achieved by use of commercially available 3H-labeled succinimidyl-4-azidobenzoate. Specific binding of [3H]Az-A-1 and [3H]Az-C7
合成了新的对光不稳定的Teleocidin衍
生物(Az-A-1,Az-C 7和Az-C 2),并通过与肿瘤促进活性相关的三种体外
生物测定法进行了检查。Az-A-1(15)和Az-C 7的两个差向异构体(11a,11b)的活性比电离蛋白的基本结构(-)-
吲哚-V-(1)高约10至100倍。通过使用可商购的3 H标记的琥珀
酰亚胺基-4-
叠氮基
苯甲酸酯,可以合成具有超过40Ci / mmol的比活性的3 H标记的探针。[ 3 H] Az-A-1和[ 3 H] Az-C 7的特异性结合对于小鼠表皮微粒部分而言,远程信息素的靶组织在约20nM是可饱和的。使用[ 3 H] Az-A-1在颗粒级分上进行光亲和性标记,支持了最近的假设,即telociocidins 7位的烷基链与邻近受体位点的
磷脂相互作用。
SDS凝胶电泳的光标记颗粒级分表明存在两种蛋白质(约30和50kD),它们分别由[ 3 H] Az-A-1和[