Tommy Komay

Gβγ engages PLCβ3 at multiple sites to reorient and facilitate its activation

Phospholipase C β (PLCβ) enzymes are activated by heterotrimeric G protein subunits, increasing hydrolysis of phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2) at the plasma membrane. All four human PLCβ isoforms (PLCβ1–4) are activated by Gαq, whereas PLCβ1–3 are activated to varying extents by Gβγ. The binding sites...