Generation by mutasynthesis of potential neuroprotectant derivatives of the bipyridyl collismycin A
作者:Carlos Sialer、Ignacio García、Javier González-Sabín、Alfredo F. Braña、Carmen Méndez、Francisco Morís、José A. Salas
DOI:10.1016/j.bmcl.2013.08.017
日期:2013.10
mutant was unable of synthesizing collismycin A but it recovered this capability when picolinic acid was added to the culture medium. By feeding different picolinic acid analogs to this mutant, two new collismycin A derivatives were obtained with a methyl group at the 4 and 6 position of the first pyridine ring of collismycin A, respectively. The two compounds showed effective neuroprotective action
Collismycin A是天然产物2,2'-联吡啶基家族的成员,并且在结构上属于杂化聚酮-非核糖体肽。编码链霉菌的赖氨酸2-氨基转移酶的基因sp。CS40(Collismycin A生产者)通过基因置换而失活。该突变体不能合成Collistycin A,但是当将吡啶甲酸加到培养基中时,它恢复了这种能力。通过给该突变体提供不同的吡啶甲酸类似物,获得了两个新的Collistycin A衍生物,它们分别在collismycin A的第一个吡啶环的4位和6位带有一个甲基。在斑马鱼模型中,这两种化合物对氧化应激诱导物显示出有效的神经保护作用,其中一种显示出比Collismycin A和对照硫辛酸更高的神经保护活性。