Structural Basis of Transcription Inhibition by CBR Hydroxamidines and CBR Pyrazoles
作者:Yu Feng、David Degen、Xinyue Wang、Matthew Gigliotti、Shuang Liu、Yu Zhang、Deepankar Das、Trevor Michalchuk、Yon W. Ebright、Meliza Talaue、Nancy Connell、Richard H. Ebright
DOI:10.1016/j.str.2015.06.009
日期:2015.8
CBR hydroxamidines are small-molecule inhibitors of bacterial RNA polymerase (RNAP) discovered through high-throughput screening of synthetic-compound libraries. CBR pyrazoles are structurally related RNAP inhibitors discovered through scaffold hopping from CBR hydroxamidines. CBR hydroxamidines and pyrazoles selectively inhibit Gram-negative bacterial RNAP and exhibit selective antibacterial activity
CBR羟x啶是通过合成化合物文库的高通量筛选发现的细菌RNA聚合酶(RNAP)的小分子抑制剂。CBR吡唑是与结构相关的RNAP抑制剂,是通过从CBR异羟肟酸的脚手架跳跃中发现的。CBR羟x啶和吡唑选择性抑制革兰氏阴性细菌RNAP,并显示出对革兰氏阴性细菌的选择性抗菌活性。在这里,我们报告与大肠杆菌RNAP全酶复合的原型CBR氢x啶,CBR703和CBR吡唑的晶体结构。此外,我们定义了CBR703的完全抗性决定子,表明CBR703的结合位点和抗性决定子不与其他特征性RNAP抑制剂的结合位点和抗性决定子重叠,显示CBR703与其他特征性RNAP抑制剂无交叉耐药性或最小交叉耐药性,并且显示CBR703与其他RNAP抑制剂共同给药可产生累加的抗菌活性。结果为CBR抑制剂作为抗菌药物的基于结构的优化奠定了基础。