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  • Title: Fragment-based and structure-guided discovery and optimization of Rho kinase inhibitors.
    Author: Li R, Martin MP, Liu Y, Wang B, Patel RA, Zhu JY, Sun N, Pireddu R, Lawrence NJ, Li J, Haura EB, Sung SS, Guida WC, Schonbrunn E, Sebti SM.
    Journal: J Med Chem; 2012 Mar 08; 55(5):2474-8. PubMed ID: 22272748.
    Abstract:
    Using high concentration biochemical assays and fragment-based screening assisted by structure-guided design, we discovered a novel class of Rho-kinase inhibitors. Compound 18 was equipotent for ROCK1 (IC(50) = 650 nM) and ROCK2 (IC(50) = 670 nM), whereas compound 24 was more selective for ROCK2 (IC(50) = 100 nM) over ROCK1 (IC(50) = 1690 nM). The crystal structure of the compound 18-ROCK1 complex revealed that 18 is a type 1 inhibitor that binds the hinge region in the ATP binding site. Compounds 18 and 24 inhibited potently the phosphorylation of the ROCK substrate MLC2 in intact human breast cancer cells.
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