作者:Jeffrey K. Holden、Matthew C. Lewis、Maris A. Cinelli、Ziad Abdullatif、Anthony V. Pensa、Richard B. Silverman、Thomas L. Poulos
DOI:10.1021/acs.biochem.6b00786
日期:2016.10.4
Nitric oxide is produced in Gram-positive pathogens Bacillus anthracis and Staphylococcus aureus by the bacterial isoform of nitric oxide synthase (NOS). Inhibition of bacterial nitric oxide synthase (bNOS) has been identified as a promising antibacterial strategy for targeting methicillin-resistant S. aureus [Holden, J. K., et al. (2015) Chem. Biol. 22, 785–779]. One class of NOS inhibitors that demonstrates antimicrobial efficacy utilizes an aminoquinoline scaffold. Here we report on a variety of aminoquinolines that target the bacterial NOS active site, in part, by binding to a hydrophobic patch that is unique to bNOS. Through mutagenesis and crystallographic studies, our findings demonstrate that aminoquinolines are an excellent scaffold for further aiding in the development of bNOS specific inhibitors.
一氧化氮在革兰氏阳性病原体炭疽杆菌和金黄色葡萄球菌中由一氧化氮合酶(NOS)的细菌异构体产生。抑制细菌一氧化氮合酶(bNOS)已被确定为针对耐甲氧西林金黄色葡萄球菌的一种有前景的抗菌策略[Holden,J. K.等(2015)Chem. Biol. 22,785-779]。一类具有抗菌功效的 NOS 抑制剂使用了氨基喹啉支架。我们在此报告了多种氨基喹啉,它们部分是通过与 bNOS 特有的疏水斑块结合而靶向细菌 NOS 活性位点的。通过诱变和晶体学研究,我们的发现表明氨基喹啉是进一步帮助开发 bNOS 特异性抑制剂的绝佳支架。