Stereo-Defined Acyclic Nucleoside Phosphonates are Selective and Potent Inhibitors of Parasite 6-Oxopurine Phosphoribosyltransferases
作者:Tomáš Klejch、Dianne T. Keough、Gordon King、Eva Doleželová、Michal Česnek、Miloš Buděšínský、Alena Zíková、Zlatko Janeba、Luke W. Guddat、Dana Hocková
DOI:10.1021/acs.jmedchem.1c01881
日期:2022.3.10
Plasmodium and Trypanosoma spp. are unable to synthesize purine nucleobases. They rely on the salvage of these purines and their nucleosides from the host cell to synthesize the purine nucleotides required for DNA/RNA production. The key enzymes in this pathway are purine phosphoribosyltransferases (PRTs). Here, we synthesized 16 novel acyclic nucleoside phosphonates, 12 with a chiral center at C-2′, and
病原体如疟原虫和锥虫属。不能合成嘌呤碱基。他们依靠从宿主细胞中回收这些嘌呤及其核苷来合成 DNA/RNA 生产所需的嘌呤核苷酸。该途径中的关键酶是嘌呤磷酸核糖基转移酶 (PRT)。在这里,我们合成了 16 种新型无环核苷膦酸酯,其中 12 种在 C-2' 处具有手性中心,8 种在 C-6' 处具有第二个手性中心。其中,双膦酸盐(S,S)-48是恶性疟原虫和间日疟原虫6-氧嘌呤 PRT 最有效的抑制剂,也是两种布氏锥虫最有效的抑制剂( Tbr ) 6-氧嘌呤 PRT 尚未发现,K i值低至 2 nM。( S , S )- 48与人和Tbr 6-氧嘌呤 PRT 复合的晶体结构表明,抑制剂以不同构象与酶结合,解释了其效力和选择性(即35 倍有利于寄生虫酶)。