Phosphatidylinositol 4-kinase beta (PI4KB)

Phosphorylates phosphatidylinositol (PI) at the first committed step in the production of this second messenger inositol- 1,4,5,-trisphosphate (PIP). May regulate Golgi disintegration/reorganization during mitosis, possibly via its phosphorylation.

Involved in Golgi-to-plasma membrane trafficking (By similarity). .