Phosphatidylinositol 4-phosphate 5-kinase type-1 beta (PIP5K1B)

Participates in the biosynthesis of phosphatidylinositol 4,5-bisphosphate. Mediates RAC1-dependent reorganization of actin filaments.

Contributes to the activation of PLD2. Together with PIP5K1A is necessary after stimulation of G-protein coupled receptors for stable platelet adhesion (By similarity).