Lipoprotein lipase - P06858 (LIPL_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Key enzyme in triglyceride metabolism. Catalyzes the hydrolysis of triglycerides from circulating chylomicrons and very low density lipoproteins (VLDL), and thereby plays an important role in lipid clearance from the blood stream, lipid utilization and storage (PubMed:8675619, PubMed:11342582, PubMed:27578112). Although it has both phospholipase and triglyceride lipase activities it is primarily a triglyceride lipase with low but detectable phospholipase activity (PubMed:7592706, PubMed:12032167). Mediates margination of triglyceride-rich lipoprotein particles in capillaries (PubMed:24726386). Recruited to its site of action on the luminal surface of vascular endothelium by binding to GPIHBP1 and cell surface heparan sulfate proteoglycans (PubMed:11342582, PubMed:27811232). UniProt
Catalytic Activity
1,2-dihexadecanoyl-sn-glycero-3-phosphocholine + H2O = H+ + hexadecanoate + hexadecanoyl-sn-glycero-3-phosphocholine UniProt
Pathway Maps
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Subunit Structure
Homodimer (PubMed:16179346, PubMed:26725083, PubMed:11893776) (Probable). Interacts with GPIHBP1 with 1:1 stoichiometry (PubMed:17997385, PubMed:27929370, PubMed:26725083, PubMed:27811232, PubMed:29899144, PubMed:30559189). Interacts with APOC2; the interaction activates LPL activity in the presence of lipids (By similarity). Interaction with heparan sulfate proteoglycans is required to protect LPL against loss of activity (PubMed:11342582). Associates with lipoprotein particles in blood plasma (PubMed:11342582, PubMed:11893776). Interacts with LMF1 and SEL1L; interaction with SEL1L is required to prevent aggregation of newly synthesized LPL in the endoplasmic reticulum (ER), and for normal export of LPL from the ER to the extracellular space (PubMed:25066055). Interacts with SORL1; SORL1 acts as a sorting receptor, promoting LPL localization to endosomes and later to lysosomes, leading to degradation of newly synthesized LPL (PubMed:21385844). UniProt
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Data in green originates from UniProtKB  
Variation data (sourced from UniProt) shows non-genetic variation from the ExPASy   and dbSNP   websites.
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in purple originates from Phosphosite  .
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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Validation Track

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Data in red indicates combined ranges of Homology Models from the SWISS-MODEL Repository  
The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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