Design, Synthesis, and Crystal Structures of 6-Alkylidene-2′-Substituted Penicillanic Acid Sulfones as Potent Inhibitors of <i>Acinetobacter baumannii</i> OXA-24 Carbapenemase
作者:German Bou、Elena Santillana、Anjaneyulu Sheri、Alejandro Beceiro、Jared M. Sampson、Matthew Kalp、Christopher R. Bethel、Anne M. Distler、Sarah M. Drawz、Sundar Ram Reddy Pagadala、Focco van den Akker、Robert A. Bonomo、Antonio Romero、John D. Buynak
DOI:10.1021/ja104092z
日期:2010.9.29
enzymes are found in multi-drug resistant (MDR) Acinetobacter baumannii and Pseudomonas aeruginosa, novel β-lactamase inhibitors are urgently needed. Five unique 6-alkylidene-2'-substituted penicillanic acid sulfones (1-5) were synthesized and tested against OXA-24, a clinically important β-lactamase that inactivates carbapenems and is found in A. baumannii. Based upon the roles Tyr112 and Met223 play
D 类 β-内酰胺酶代表了一类不断增长的多样化青霉素失活酶,这些酶通常对商业 β-内酰胺酶抑制剂具有抗性。由于在多重耐药(MDR)鲍曼不动杆菌和铜绿假单胞菌中发现了许多此类酶,因此迫切需要新型β-内酰胺酶抑制剂。合成了五种独特的 6-亚烷基-2'-取代的青霉烯酸砜 (1-5),并针对 OXA-24 进行了测试,OXA-24 是一种临床上重要的 β-内酰胺酶,可灭活碳青霉烯类,并且存在于鲍曼不动杆菌中。基于 Tyr112 和 Met223 在 OXA-24 β-内酰胺酶中的作用,我们还设计了两种变体(Tyr112Ala 和 Tyr112Ala,Met223Ala)来测试由这些残基形成的疏水隧道影响抑制剂识别的假设。针对 OXA-24 和两种 OXA-24 β-内酰胺酶变体的 IC(50) 值范围为 10 ± 1(4 对 WT)至 338 ± 20 nM(5 对 Tyr112Ala、Met223Ala)。化合物