Targeting the Unique Mechanism of Bacterial 1-Deoxy-<scp>d</scp>-xylulose-5-phosphate Synthase
作者:David Bartee、Caren L. Freel Meyers
DOI:10.1021/acs.biochem.8b00548
日期:2018.7.24
bisubstrate inhibitors bearing an acetylphosphonate (AP) pyruvate mimic and a distal negative charge mimicking the phosphoryl group of d-GAP, designed to target the unique form of DXP synthase that binds LThDP and d-GAP in a ternary complex. A d-phenylalanine-derived triazole acetylphosphonate (d-PheTrAP) emerged as the most potent inhibitor in this series, displaying slow, tight-binding inhibition
细菌代谢物1-脱氧d -xyulose -5-磷酸(DXP)是在细菌中心代谢馈送必需成异戊二烯,二磷酸硫胺(THDP),和磷酸吡哆醛从头生物合成。通过抑制DXP合酶来停止其生产是开发新型抗生素的一种有吸引力的策略。最近的工作表明,DXP合酶利用独特的随机顺序机制,该机制要求在丙酮酸衍生的C2α-乙酰硫胺素二磷酸酯(LThDP),d-甘油醛3-磷酸酯(d-GAP)和酶,将其与所有其他已知的ThDP依赖性酶区分开。在本文中,我们描述了双底物抑制剂的开发,该抑制剂具有乙酰基膦酸酯(AP)丙酮酸酯模拟物和模拟d -GAP磷酸基团的远端负电荷,旨在靶向结合LThDP和d -GAP的DXP合酶的独特形式。复杂的。甲d -苯丙氨酸衍生三唑acetylphosphonate(d -PheTrAP)成为在本系列的最有效的抑制剂,显示慢,紧密结合抑制与ķ我* 90±10nM的,向前(的ķ 1)和反向(ķ 2)1