Fluorine Scan of Inhibitors of the Cysteine Protease Human Cathepsin L: Dipolar and Quadrupolar Effects in the π-Stacking of Fluorinated Phenyl Rings on Peptide Amide Bonds
作者:Maude Giroud、Michael Harder、Bernd Kuhn、Wolfgang Haap、Nils Trapp、W. Bernd Schweizer、Tanja Schirmeister、François Diederich
DOI:10.1002/cmdc.201600132
日期:2016.5.19
the S3 pocket, was systematically fluorinated, and differences in inhibitory potency were measured in a fluorimetric assay. Binding affinity is influenced by lipophilicity (clog P), the dipole and quadrupole moments of the fluorinated rings, but also by additional interactions of the introduced fluorine atoms with the local environment of the pocket. Generally, the higher the degree of fluorination
使用包括酶-配体结合研究和高级量子化学计算在内的双重方法,研究了蛋白质主链酰胺基上的氟化苯环的π-堆积。在实验研究中,系统组织地氟化了人类组织蛋白酶L(hCatL)的三嗪腈抑制剂的苯基取代基,该苯基堆叠在S3口袋入口处的肽酰胺键Gly67-Gly68上,并测定了抑制力的差异。荧光测定。亲和力受亲脂性的影响(c log P),氟化环的偶极矩和四极矩,而且还可以通过引入的氟原子与腔的局部环境的其他相互作用来实现。通常,氟化度越高,结合亲和力越好。气相计算强有力地支持了氟化苯环的分子四极矩对与肽键的π堆积相互作用的贡献。这些发现为增强蛋白酰胺片段上的π堆积提供了有用的指导。