Structural analysis of the active sites of dihydrofolate reductase from two species of Candida uncovers ligand-induced conformational changes shared among species
作者:Janet L. Paulsen、Kishore Viswanathan、Dennis L. Wright、Amy C. Anderson
DOI:10.1016/j.bmcl.2013.01.008
日期:2013.3
development of potent and selective antifolates effective against dihydrofolate reductase. Crystal structure analysis suggested that an essential loop at the active site (Thr 58-Phe 66) differs from the analogous residues in the human enzyme, potentially providing a mechanism for achieving selectivity. In order to probe the role of this loop, we employed chemical synthesis, crystal structure determination
一种针对病原体白色念珠菌和光滑念珠菌的新策略侧重于开发对二氢叶酸还原酶有效的强效选择性抗叶酸剂。晶体结构分析表明,活性位点 (Thr 58-Phe 66) 上的一个基本环不同于人类酶中的类似残基,这可能为实现选择性提供了一种机制。为了探索这个回路的作用,我们采用了化学合成、晶体结构测定和分子动力学模拟。这些分析的结果表明,环残基经历了配体诱导的构象变化,这在真菌和人类物种中是相似的。