Regulates localization of phosphatidylinositol 4-kinase (PI4K) to the plasma membrane, possibly by reducing the association of TTC7 (TTC7A or TTC7B) with the PI4K complex . Acts as a regulator of phosphatidylinositol 4-phosphate (PtdIns(4)P) synthesis . May also play a role in fasting-induced catabolism (By similarity).
Subcellular locations: Cell membrane
Localizes mainly at the plasma membrane; only a minor fraction localizes on intracellular structures .