Five stereoisomeric analogues, 2-6, of FK-156 (1), an immunostimulating microbial metabolite, have been synthesized and screened for immunostimulating activity. The results indicate that the D-configuration of glutamic acid and L-configuration of diaminopimelic acid at the site combining with other amino acids are essential, while the configurations of lactic acid and alanine are of little importance for the biological activity of the FK-156 series.
我们合成了一种免疫刺激微
生物代谢物 FK-156 (1) 的五种立体异构体类似物 2-6,并对其进行了免疫刺激活性筛选。结果表明,在与其他
氨基酸结合的部位,谷
氨酸的 D-构型和二
氨基丙二酸的 L-构型是必不可少的,而
乳酸和丙
氨酸的构型对 FK-156 系列的
生物活性并不重要。