GCN2-IN-6

• CAT Number: I017736
• CAS Number: 2183470-09-7
• Molecular Formula: C19H12Cl2F2N4O3S
• Molecular Weight: 485.29
• Purity: ≥95%
• Synonyms: N-[3-[2-(2-aminopyrimidin-5-yl)ethynyl]-2,4-difluorophenyl]-2,5-dichloro-3-(hydroxymethyl)benzenesulfonamide
• InChI: InChI=1S/C19H12Cl2F2N4O3S/c20-12-5-11(9-28)17(21)16(6-12)31(29,30)27-15-4-3-14(22)13(18(15)23)2-1-10-7-25-19(24)26-8-10/h3-8,27-28H,9H2,(H2,24,25,26)
• InChIKey: VJXAWOQPYMAEFQ-UHFFFAOYSA-N
• SMILES: C1=CC(=C(C(=C1NS(=O)(=O)C2=CC(=CC(=C2Cl)CO)Cl)F)C#CC3=CN=C(N=C3)N)F

GCN2-IN-6 (Compound 6d) is a potent, and orally available GCN2 inhibitor confirmed by in-house enzymatic (IC50 of 1.8 nM) and cellular assays (IC50 of 9.3 nM). GCN2-IN-6 is also a eIF2α kinase PERK inhibitor with an IC50 of 0.26 nM (in enzymatic assay) and 230 nM (in cells)[1]. GCN2-IN-6 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
To examine the impact of GCN2 inhibition on cancer cell proliferation, acute lymphoblastic leukemia (ALL) CCRFCEM cells are treated with GCN2-IN-6 (Compound 6d) in the presence of asparaginedepleting agent asparaginase. Treatment with GCN2-IN-6 greatly sensitizes CCRF-CEM cells to asparaginase. The moderate antiproliferative effects achieved by combining asparaginase and GCN2-IN-6 treatment are observed in GCN2-wildtype (WT) mouse embryonic fibroblast (MEF) cells but not in GCN2-knockout (KO) MEF. GCN2-IN-6 demonstrates suppression on p-GCN2, p-eIF2α, and ATF4 activated by asparaginase[1].
GCN2-IN-6 (Compound 6d; 0.3-3 mg/kg; oral administration; for 8 hours; mice) treatment at 3 mg/kg suppresses both self-phosphorylation of GCN2 and the downstream effector ATF4 to the basal level following pretreatment with asparaginase[1].

Reference

[1]. Fujimoto J, et al. Identification of Novel, Potent, and Orally Available GCN2 Inhibitors with Type I Half Binding Mode. ACS Med Chem Lett. 2019 Sep 19;10(10):1498-1503.
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