Target type: molecularfunction
Catalysis of the reaction: triacylglycerol + H2O = diacylglycerol + a carboxylate, where the triacylglycerol is part of a lipoprotein. [EC:3.1.1.34, GOC:bf]
Lipoprotein lipase (LPL) is an enzyme that hydrolyzes triglycerides (fats) carried in chylomicrons and very-low-density lipoproteins (VLDL) in the bloodstream. This hydrolysis releases free fatty acids and glycerol, which can be used as energy sources by tissues. LPL is primarily found on the surface of endothelial cells lining blood vessels, particularly in adipose tissue, skeletal muscle, and the heart.
LPL activity is crucial for lipid metabolism and energy homeostasis. It plays a vital role in:
* **Transporting dietary fats:** LPL breaks down triglycerides in chylomicrons, which are lipoproteins that transport dietary fats from the intestines to the bloodstream. The released fatty acids are then taken up by various tissues for energy or storage.
* **Regulating plasma lipid levels:** LPL helps clear triglycerides from the blood, contributing to the regulation of plasma lipid levels and preventing the accumulation of harmful cholesterol and fat.
* **Providing energy for tissues:** The free fatty acids released by LPL can be used as an energy source by various tissues, including skeletal muscle and heart.
* **Regulating insulin sensitivity:** LPL activity is linked to insulin sensitivity, and dysregulation of LPL can contribute to insulin resistance and metabolic disorders like diabetes.
LPL's activity is regulated by various factors, including:
* **Hormones:** Insulin stimulates LPL activity, while glucagon inhibits it.
* **Dietary factors:** A diet rich in fatty acids can increase LPL activity.
* **Physical activity:** Exercise can enhance LPL activity.
Defects in LPL can lead to various metabolic disorders, including hypertriglyceridemia (elevated blood triglycerides) and lipoprotein lipase deficiency. These conditions can increase the risk of cardiovascular disease and other health problems.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Patatin-like phospholipase domain-containing protein 2 | A patatin-like phospholipase domain-containing protein 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96AD5] | Homo sapiens (human) |
| Diacylglycerol lipase-alpha | A diacylglycerol lipase-alpha that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9Y4D2] | Homo sapiens (human) |
| Endothelial lipase | An endothelial lipase that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9Y5X9] | Homo sapiens (human) |
| Hepatic triacylglycerol lipase | A hepatic triacylglycerol lipase that is encoded in the genome of human. [PRO:DNx, UniProtKB:P11150] | Homo sapiens (human) |
| Patatin-like phospholipase domain-containing protein 2 | A patatin-like phospholipase domain-containing protein 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96AD5] | Homo sapiens (human) |
| Lipoprotein lipase | A lipoprotein lipase that is encoded in the genome of human. [PRO:DNx, UniProtKB:P06858] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| cannabinol | Cannabinol: A physiologically inactive constituent of Cannabis sativa L. | dibenzopyran | |
| 1,6-bis(cyclohexyloximinocarbonyl)hexane | 1,6-bis(cyclohexyloximinocarbonyl)hexane: selective inhibitor of canine platelet diglyceride lipase | carbamate ester; organonitrogen compound | |
| cannabichromene | 1-benzopyran | ||
| (6ar-trans)-isomer of tetrahydrocannabivarin 9 | |||
| delta(9)-tetrahydrocannabinolic acid | Delta(9)-tetrahydrocannabinolic acid : A diterpenoid that is 6a,7,8,10a-tetrahydro-6H-benzo[c]chromene substituted at position 1 by a hydroxy group, positions 6, 6 and 9 by methyl groups and at position 3 by a pentyl group. A biosynthetic precursor to Delta(9)-tetrahydrocannabinol, the principal psychoactive constituent of the cannabis plant. | benzochromene; diterpenoid; hydroxy monocarboxylic acid; phytocannabinoid; polyketide | anti-inflammatory agent; biomarker; metabolite; neuroprotective agent |
| cannabidiolic acid | cannabidiolic acid : A dihydroxybenzoic acid that is olivetolic acid in which the hydrogen at position 3 is substituted by a 3-p-mentha-1,8-dien-3-yl (limonene) group. cannabidiolic acid: structure | dihydroxybenzoic acid; phytocannabinoid; polyketide; resorcinols | |
| nutlin 3 | stilbenoid | ||
| cannabidiol | cannabidiol : An cannabinoid that is cyclohexene which is substituted by a methyl group at position 1, a 2,6-dihydroxy-4-pentylphenyl group at position 3, and a prop-1-en-2-yl group at position 4. Cannabidiol: Compound isolated from Cannabis sativa extract. | olefinic compound; phytocannabinoid; resorcinols | antimicrobial agent; plant metabolite |
| orlistat | orlistat : A carboxylic ester resulting from the formal condensation of the carboxy group of N-formyl-L-leucine with the hydroxy group of (3S,4S)-3-hexyl-4-[(2S)-2-hydroxytridecyl]oxetan-2-one. A pancreatic lipase inhibitor, it is used as an anti-obesity drug. Orlistat: A lactone derivative of LEUCINE that acts as a pancreatic lipase inhibitor to limit the absorption of dietary fat; it is used in the management of obesity. | beta-lactone; carboxylic ester; formamides; L-leucine derivative | anti-obesity agent; bacterial metabolite; EC 2.3.1.85 (fatty acid synthase) inhibitor; EC 3.1.1.3 (triacylglycerol lipase) inhibitor |
| cannabigerol | cannabigerol : A member of the class of resorcinols that is resorcinol which is substituted by a (2E)-3,7-dimethylocta-2,6-dien-1-yl group at position 2 and by a pentyl group at position 5. It is a natural product found in Cannabis sativa and Helichrysum species. cannabigerol: RN given refers to (E)-isomer; structure given in first source | phytocannabinoid; resorcinols | anti-inflammatory agent; antibacterial agent; antioxidant; appetite enhancer; cannabinoid receptor agonist; neuroprotective agent; plant metabolite |
| cannabigerolic acid | cannabigerolic acid : A dihydroxybenzoic acid that is olivetolic acid in which the hydrogen at position 3 is substituted by a geranyl group. A biosynthetic precursor to Delta(9)-tetrahydrocannabinol, the principal psychoactive constituent of the cannabis plant. cannabigerolic acid: structure in first source | dihydroxybenzoic acid; diterpenoid; phytocannabinoid; polyketide; resorcinols | |
| CAY10435 | oxazolopyridine | ||
| ly2183240 | LY2183240: structure in first source | biphenyls | |
| cannabidivarin | cannabidivarin: from Cannabis sativa | monoterpenoid | |
| omdm 169 | OMDM 169: has antinociceptive activity; structure in first source | ||
| am 6701 | |||
| atglistatin | atglistatin : A biphenyl that is 1,1'-biphenyl substituted by (dimethylcarbamoyl)amino and dimethylamino groups at positions 3 and 4', respectively. It is a potent inhibitor of adipose triglyceride lipase activity (IC50 = 700nM). atglistatin: inhibits adipose triglyceride lipase; structure in first source | ||
| xen445 |