Structure-activity relationships of sparsomycin and its analogs. Inhibition of peptide bond formation in cell-free systems and of L1210 and bacterial cell growth
作者:Leon A. G. M. Van den Broek、Rob M. J. Liskamp、J. Hans Colstee、Peter Lelieveld、Miguel Remacha、David Vazquez、Juan P. G. Ballesta、Harry C. J. Ottenheijm
DOI:10.1021/jm00385a014
日期:1987.2
synthesis. The inhibition of L1210 colony formation in soft agar and bacterial cell growth in solid as well as in liquid medium was also examined. Each analogue possesses not more than two structural modifications of the sparsomycin molecule. This enabled us to determine unambiguously several structural and stereochemical features that are required for an optimal biological activity in these assays
通过测量蛋白质合成的抑制作用,在大肠杆菌,酿酒酵母和Sulfolobus solfataricus的无细胞系统中研究了Sparsomycin(1)的14种类似物的生物活性。还检查了在软琼脂中对L1210集落形成的抑制以及在固体以及液体培养基中细菌细胞的生长。每个类似物都具有不超过两个的稀疏霉素分子结构修饰。这使我们能够明确确定这些测定法中最佳生物活性所需的几种结构和立体化学特征。具有SCRS手性的稀疏霉素是四种可能的立体异构体中最有效的。用化合物5-7获得的结果表明,在S(α)原子上存在氧原子是必不可少的。CH2基团(10)取代二价硫原子或Cl原子(12)取代SCH3部分会部分影响分子的活性。化合物12令人惊讶地对完整细胞具有活性。H(14)取代C(6)-CH3基团会降低分子的活性。将反式双键异构化为顺式双键可产生顺式-顺子霉素(15),该化合物无活性。疏水性衍生物8、9和11的活性远高于