Description
G9a and G9a-
like protein (GLP) are euchromatic histone-
lysine methyltransferases (EHMT2 and EHMT1, respectively) that can heterodimerize with each other to methylate several proteins in addition to histone H3. UNC0646 is a potent and selective inhibitor of G9a and GLP activities
in vitro (IC
50s = 6 and 15 nM, respectively) and G9a/GLP-
mediated dimethylation of histone 3 on lysine 9 in MDA-
MB-
231 cells (IC
50 = 26 nM). It is highly selective for G9a/GLP over several other protein lysine and arginine methyltransferases. UNC0646 potently inhibits G9a/GLP activity in a variety of cancer cell lines as well as in the human fetal lung IMR-
90 line. This compound selectively targets the corepressor function of G9a without affecting its ability to act as a coactivator with glucocorticoid receptor.
References
[1] liu f, barsyte-lovejoy d, allali-hassani a, he y, herold jm, chen x, yates cm, frye sv, brown pj, huang j, vedadi m, arrowsmith ch, jin j. optimization of cellular activity of g9a inhibitors 7-aminoalkoxy-quinazolines. j med chem. 2011;54(17):6139-50.
[2] liu f, barsyte-lovejoy d, li f, xiong y, korboukh v, huang xp, allali-hassani a, janzen wp, roth bl, frye sv, arrowsmith ch, brown pj, vedadi m, jin j. discovery of an in vivo chemical probe of the lysine methyltransferases g9a and glp. j med chem. 2013;56(21):8931-42.