Hyccin (Fam126a)

Component of a complex needed to localize phosphatidylinositol 4-kinase (PI4K) to the plasma membrane. The complex functions as a regulator of phosphatidylinositol 4-phosphate (PtdIns(4)P) synthesis.

FAM126A plays an integral role in oligodendrocytes formation, a cell type with expanded plasma membrane which requires generation of PtdIns(4)P. Its role in oligodendrocytes formation likely explains its significance in myelination of the central and peripheral nervous system.