A0A8D0GXM9 · A0A8D0GXM9_SPHPU
- ProteinLipoprotein lipase
- GeneLPL
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids457 (go to sequence)
- Protein existenceInferred from homology
- Annotation score5/5
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.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Active site | 144 | Nucleophile | |||
Active site | 168 | Charge relay system | |||
Binding site | 182 | Ca2+ (UniProtKB | ChEBI) | |||
Binding site | 187 | Ca2+ (UniProtKB | ChEBI) | |||
Active site | 253 | Charge relay system | |||
GO annotations
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameLipoprotein lipase
- EC number
- Short namesLPL
Gene names
Organism names
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Lepidosauria > Sphenodontia > Sphenodontidae > Sphenodon
Accessions
- Primary accessionA0A8D0GXM9
Proteomes
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
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 | 326-449 | PLAT | |||
Sequence similarities
Belongs to the AB hydrolase superfamily. Lipase family.
Keywords
- Domain
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Length457
- Mass (Da)51,929
- Last updated2022-01-19 v1
- Checksum18777FCA86E949ED
Computationally mapped potential isoform sequences
There is 1 potential isoform mapped to this entry
Entry | Entry name | Gene name | Length | ||
---|---|---|---|---|---|
A0A8D0GW52 | A0A8D0GW52_SPHPU | LPL | 451 |
Keywords
- Technical term