Potent inhibition of dinuclear zinc(II) peptidase, an aminopeptidase from Aeromonas proteolytica, by 8-quinolinol derivatives: inhibitor design based on Zn2+ fluorophores, kinetic, and X-ray crystallographic study
作者:Kengo Hanaya、Miho Suetsugu、Shinya Saijo、Ichiro Yamato、Shin Aoki
DOI:10.1007/s00775-012-0873-4
日期:2012.4
to Zn2+ in a bidentate manner to form very stable Zn2+ complexes at neutral pH (K d = 8–50 fM at pH 7.4). On the basis of this finding, it was hypothesized that 8-HQ derivatives have the potential to function as specific inhibitors of Zn2+ enzymes, especially dinuclear Zn2+ hydrolases. Assays of 8-HQ derivatives as inhibitors were performed against commercially available dinuclear Zn2+ enzymes such as
报道了8-喹啉醇(8-羟基喹啉,8-HQ)衍生物对蛋白水解气单胞菌(AAP)(一种双核Zn 2+水解酶)的氨基肽酶的选择性抑制作用。先前我们曾报道过将8-HQ侧链环的制备方法为Zn 2+荧光团(周期为1,4,7,10-四氮杂环十二烷),其中8-HQ单元的氮和酚盐(以及四个在中性pH值(K d = pH 7.4时,K d = 8-50 fM )中,Cyclen的氮原子以双齿方式与Zn 2+结合形成非常稳定的Zn 2+复合物。根据这一发现,假设8-HQ衍生物具有充当Zn 2+的特异性抑制剂的潜力。 酶,特别是双核Zn 2+水解酶。针对商用双核Zn 2+酶(如AAP和碱性磷酸酶)进行了8-HQ衍生物作为抑制剂的测定。发现8-HQ和5-取代的8-HQ衍生物是AAP的竞争性抑制剂,在pH 8.0时的抑制常数为0.16-29μM。已发现8-HQ的1-位氮和8-氢氧根对于抑制AAP是必不可少的。用AA