The primary function of this lipase is the hydrolysis of triglycerides of circulating chylomicrons and very low density lipoproteins (VLDL). Binding to heparin sulfate proteogylcans at the cell surface is vital to the function. The apolipoprotein, APOC2, acts as a coactivator of LPL activity in the presence of lipids on the luminal surface of vascular endothelium.
Specificity
Natural and recombinant Mouse Lipoprotein lipase
Subcellular Location
Cell membrane Lipid-anchor GPI-anchor Secreted Locates to the plasma membrane of microvilli of hepatocytes with triacyl-glycerol-rich lipoproteins (TRL). Some of the bound LPL is then internalized and located inside non-coated endocytic vesicles.
Homodimer (By similarity). Interacts with APOC2; the interaction activates LPL activity in the presence of lipids (By similarity). Interacts with GPIHBP1.