Use of the dehydrophos biosynthetic enzymes to prepare antimicrobial analogs of alaphosphin
作者:Despina J. Bougioukou、Chi P. Ting、Spencer C. Peck、Subha Mukherjee、Wilfred A. van der Donk
DOI:10.1039/c8ob02860e
日期:——
enzyme is also tolerant with respect to the amino acid attached to tRNALeu. Using a mutant of leucyl tRNA synthetase that is deficient in its proofreading ability allowed the preparation of a series of aminoacyl-tRNALeu derivatives (Ile, Ala, Val, Met, norvaline, and norleucine). DhpH-C accepted these aminoacyl-tRNA derivatives and condensed the amino acid with l-Ala(P) to form the corresponding phosphonodipeptides
脱磷生物合成酶DhpH(DhpH-C)的C末端结构域催化Leu-tRNALeu与(R)-1-氨基乙基膦酸酯(丙氨酸的氨基膦酸酯类似物Ala(P))缩合。该反应的产物Leu-Ala(P)是磷酸二肽,一类化合物,以前已被研究用作临床抗生素。在这项研究中,我们表明DhpH-C具有高度的底物耐受性,并且可以将各种氨基膦酸酯(Gly(P),Ser(P),Val(P),1-氨基-丙基膦酸酯和苯基甘氨酸(P))缩合到Leu。而且,该酶对tRNALeu上连接的氨基酸也具有耐受性。使用缺乏校对能力的亮氨酰tRNA合成酶突变体,可以制备一系列氨酰基-tRNALeu衍生物(Ile,Ala,Val,Met,正缬氨酸和正亮氨酸)。DhpH-C接受这些氨基酰基-tRNA衍生物,并将氨基酸与1-Ala(P)缩合形成相应的磷酸二肽。这些肽的一部分显示出抗微生物活性,表明该酶是制备抗微生物肽的通用生物催化剂。我们还研究了来