G9K8I1 · G9K8I1_MUSPF
- ProteinLipoprotein lipase
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids474 (go to sequence)
- Protein existenceEvidence at transcript level
- Annotation score4/5
Function
function
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. Mediates margination of triglyceride-rich lipoprotein particles in capillaries. Recruited to its site of action on the luminal surface of vascular endothelium by binding to GPIHBP1 and cell surface heparan sulfate proteoglycans.
Catalytic activity
- a triacylglycerol + H2O = a diacylglycerol + a fatty acid + H+
Features
Showing features for active site, binding site.
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | chylomicron | |
Cellular Component | plasma membrane | |
Cellular Component | very-low-density lipoprotein particle | |
Molecular Function | apolipoprotein binding | |
Molecular Function | heparin binding | |
Molecular Function | lipoprotein lipase activity | |
Molecular Function | metal ion binding | |
Biological Process | fatty acid biosynthetic process | |
Biological Process | response to glucose | |
Biological Process | triglyceride catabolic process | |
Biological Process | very-low-density lipoprotein particle remodeling |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Protein family/group databases
Names & Taxonomy
Protein names
- Recommended nameLipoprotein lipase
- EC number
- Short namesLPL
Organism names
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Laurasiatheria > Carnivora > Caniformia > Musteloidea > Mustelidae > Mustelinae > Mustela
Accessions
- Primary accessionG9K8I1
Subcellular Location
UniProt Annotation
GO Annotation
Cell membrane ; Peripheral membrane protein
Note: Newly synthesized LPL binds to cell surface heparan proteoglycans and is then released by heparanase. Subsequently, it becomes attached to heparan proteoglycan on endothelial cells. Locates to the plasma membrane of microvilli of hepatocytes with triglyceride-rich lipoproteins (TRL). Some of the bound LPL is then internalized and located inside non-coated endocytic vesicles.
Keywords
- Cellular component
PTM/Processing
Features
Showing features for signal, chain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Signal | 1-20 | |||||
Sequence: MESKALLLVALGMWFQSLTA | ||||||
Chain | PRO_5005133119 | 21-474 | Lipoprotein lipase | |||
Sequence: TRGGVAAADRGRDFIDIESKFALRTPEDTAEDTCHLIPGVTESVANCHFNHSSKTFVVIHGWTVTGMYESWVPKLVAALYKREPDSNVIVVDWLSRAQQHYPVSAGYTKLVGKDVAKFINWMAEEFHYPLDNVHLLGYSLGAHAAGIAGSLTNKKVNRITGLDPAGPNFEYAEAPSRLSPDDADFVDVLHTFTRGSPGRSIGIQKPVGHVDIYPNGGTFQPGCNIGEAIRVIAERGLGDVDQLVKCSHERSIHLFIDSLLNEENPSKAYRCNSKEAFEKGLCLSCRKNRCNNLGYEINKVRAKRSSKMYLKTRSQMPYKVFHYQVKIHFSGTESDTQTNQAFEISLYGTVAESENIPFTLPEFSANKTYSFLIYTEVDIGELLMLKLKWKNDSYFSWSDWWSSPSFAIEKIRVKAGETQKKVIFCSREKVSHLQKGKASVVFVKCHDKSLNKKS |
Post-translational modification
Tyrosine nitration after lipopolysaccharide (LPS) challenge down-regulates the lipase activity.
Keywords
- PTM
Interaction
Subunit
Homodimer. Interacts with APOC2; the interaction activates LPL activity in the presence of lipids.
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Domain | 341-464 | PLAT | ||||
Sequence: FHYQVKIHFSGTESDTQTNQAFEISLYGTVAESENIPFTLPEFSANKTYSFLIYTEVDIGELLMLKLKWKNDSYFSWSDWWSSPSFAIEKIRVKAGETQKKVIFCSREKVSHLQKGKASVVFVK |
Sequence similarities
Belongs to the AB hydrolase superfamily. Lipase family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusFragment
- Length474
- Mass (Da)53,115
- Last updated2012-02-22 v1
- Checksum4432A3B31451CAB4
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Non-terminal residue | 1 | |||||
Sequence: M | ||||||
Non-terminal residue | 474 | |||||
Sequence: S |