PIP5KL1 (Phosphatidylinositol-4-Phosphate 5-Kinase-Like 1): PIP5KL1 is a gene that encodes an enzyme involved in phosphoinositide metabolism. This enzyme catalyzes the conversion of phosphatidylinositol 4-phosphate (PI4P) to phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), a critical signaling molecule that regulates cellular processes such as membrane trafficking and cytoskeletal organization.