PS315

PS315, a derivative of PS48 (HY-15967), is an allosteric PKC inhibitor by binding to the PIF-pocket of aPKC and inducing a displacement of the active site residue Lys111. PS315 inhibits the full-length and catalytic domain constructs of PKC_ζ (IC₅₀=10 μM) and PKC_η (IC₅₀=30 μM). PS315 has anti-cancer activity^[1]. In Vitro: Preincubation of U937 cells with 5 μM PS315 inhibits TNF-α induced NF-κB activation by 74%, whereas complete inhibition is observed with 10 μM PS315^[1].
The small allosteric inhibitor PS315 and the N-terminal region of aPKC both act directly on the PIF-pocket on-off switch. PS315, binding at the PIF-pocket, induces a displacement of the active site residue Lys111, thereby inhibiting the activity of aPKCs by allosterically affecting the catalytic mechanism of the kinase^[1].