further facilitate the rational engineering of this enzyme to become a specific 4-arginine hydroxylase. We subsequently demonstrate the utility of this engineered enzyme in the synthesis of a dipeptide fragment of the antibiotic enduracidin. This work highlights the value of applying a bioinformatics-guided approach in the discovery of novel enzymes and engineering of new catalytic activity into existing
GE81112四肽是一小类不寻常的非
核糖体肽同源物,对原核翻译起始具有有效的抑制活性。除3-羟基-1-
哌酸单元外,对
天然产物家族的非蛋白
氨基酸单体的
生物合成起源知之甚少。在这里,我们阐明了
4-羟基-1-瓜
氨酸单元的
生物发生,并确定了
铁和α-酮
戊二酸依赖性酶(Fe /αKG)在该途径中的作用。同源性建模和序列比对分析进一步促进了该酶的合理工程化,使其成为特异性的4-精
氨酸羟化酶。随后,我们证明了该工程化酶在合成抗生素耐力酸肽的二肽片段中的效用。