Function
INPP5F is an inositol 4-phosphatase that primarily acts on phosphatidylinositol 4-phosphate. It may be functionally linked to OCRL, which converts phosphatidylinositol 4,5-bisphosphate to phosphatidylinositol, enabling sequential dephosphorylation of phosphatidylinositol 4,5-bisphosphate at the 5 and 4 positions of inositol. This process plays a critical role in endocytic recycling. INPP5F acts as a regulator of TF:TFRC and integrins recycling pathways, and is also involved in cellular migration mechanisms. It modulates the AKT/GSK3B pathway by decreasing AKT and GSK3B phosphorylation. Additionally, it negatively regulates the STAT3 signaling pathway by inhibiting STAT3 phosphorylation and nuclear translocation. INPP5F is a functionally important modulator of cardiac myocyte size and the cardiac response to stress. It may also play a role as a negative regulator of axon regeneration following central nervous system injuries.