Biochem/physiol Actions
Selective two pore segment channel 2 (TCP2) agonist that preferentially mimics the Na+ signals-inducing action of PI(3,5)P2.
TPC2-A1-P is a selective two pore segment channel 2 (TCP2) agonist that mimics the action of PI(3,5)P2 where it preferentially induces Na+ signals (EC50 = 0.6 µM). In contrast, TPC2-A1-N is a much weaker Ca2+ current inducer when compared to NAADP and TPC2-A1-N. TPC2-A1-P, but not the Ca2+ signals agonist TPC2-A1-N, activates TPC2-dependent lysosomal exocytosis (30 µM, murine macrophages), while TPC2-A1-N, but not TPC2-A1-P, causes TPC2-dependent alkalinization of lysosomal lumen Ca2+ stores (10 µM, TPC2-expressing HeLa cells).