Adding a Hydrogen Bond May Not Help: Naphthyridinone vs Quinoline Inhibitors of Macrophage Migration Inhibitory Factor
作者:Thomas K. Dawson、Pawel Dziedzic、Michael J. Robertson、José A. Cisneros、Stefan G. Krimmer、Ana S. Newton、Julian Tirado-Rives、William L. Jorgensen
DOI:10.1021/acsmedchemlett.7b00384
日期:2017.12.14
Coordination of the ammonium group of Lys32 in the active site of human macrophage migration inhibitory factor (MIF) using a 1,7-naphthyridin-8-one instead of a quinoline is investigated. Both gas- and aqueous-phase DFT calculations for model systems indicate potential benefits for the added hydrogen bond with the lactam carbonyl group, while FEP results are neutral. Three crystal structures are reported
研究了使用1,7-萘啶-8-one代替喹啉在人巨噬细胞迁移抑制因子(MIF)的活性位点上Lys32的铵基团的配位作用。模型系统的气相和水相DFT计算都表明与内酰胺羰基加成氢键的潜在好处,而FEP结果为中性。据报道,MIF与3a,4a和4b的配合物具有三种晶体结构,这表明所需的氢键是在O-N距离为2.8-3.0Å的情况下形成的。化合物4b是具有K i和K d的最有效的新型MIF抑制剂值为90和94 nM; 它还具有出色的水溶性,为288μg/ mL。与FEP结果一致,尽管有额外的蛋白质-配体氢键,但萘啶酮与相关喹啉的效价相似。