Effect of the structure of adenosine mimic of bisubstrate-analog inhibitors on their activity towards basophilic protein kinases

Previously reported structural fragments that associate with the ATP-binding pocket of basophilic protein kinases were conjugated with d-arginine-containing peptides. Inhibitory potency of the resulting bisubstrate-analog inhibitors towards PKA and ROCK-II extended to subnanomolar range. The conjugates incorporating 2-pyrimidyl-5-amidothiophene fragment had the highest activity and at 100 nM concentration exhibited over 80% inhibition of most of the tested basophilic kinases of the AGC group.

Graphical abstractTesting of conjugates of a series of adenosine mimics with arginine-rich peptides as inhibitors of protein kinases revealed a compound with subnanomolar inhibitory potency.Figure optionsDownload full-size imageDownload as PowerPoint slide