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Example of a triacylglycerol. Lipolysis / l ɪ ˈ p ɒ l ɪ s ɪ s / is the metabolic pathway through which lipid triglycerides are hydrolyzed into a glycerol and free fatty acids. It is used to mobilize stored energy during fasting or exercise, and usually occurs in fat adipocytes.
In biochemistry, lipogenesis is the conversion of fatty acids and glycerol into fats, or a metabolic process through which acetyl-CoA is converted to triglyceride for storage in fat. [1] Lipogenesis encompasses both fatty acid and triglyceride synthesis , with the latter being the process by which fatty acids are esterified to glycerol before ...
The enzyme triacylglycerol lipase (also triglyceride lipase, EC 3.1.1.3;systematic name triacylglycerol acylhydrolase) catalyses the hydrolysis of ester linkages of triglycerides: [1] triacylglycerol + H 2 O ⇌ diacylglycerol + a carboxylate. These lipases are widely distributed in animals, plants and prokaryotes.
Thyroid Hormone: promotes hepatic triglyceride synthesis, enhancing lipolysis, stimulating mitochondrial fatty acid β-oxidation, and regulating cholesterol levels through various mechanisms, including LDL receptor expression and bile acid excretion.
Hormone-sensitive lipase (EC 3.1.1.79, HSL), also previously known as cholesteryl ester hydrolase (CEH), [5] sometimes referred to as triacylglycerol lipase, is an enzyme that, in humans, is encoded by the LIPE gene, [6] and catalyzes the following reaction: (1) diacylglycerol + H 2 O = monoacylglycerol + a carboxylate
The breakdown of this fat is known as lipolysis. The products of lipolysis, free fatty acids , are released into the bloodstream and circulate throughout the body. During the breakdown of triacylglycerols into fatty acids, more than 75% of the fatty acids are converted back into triacylglycerol, a natural mechanism to conserve energy, even in ...
Example of an unsaturated fat triglyceride. Left part: glycerol, right part from top to bottom: palmitic acid, oleic acid, alpha-linolenic acid. Chemical formula: C 55 H 98 O 6. Fatty acids, stored as triglycerides in an organism, are a concentrated source of energy because they contain little oxygen and are anhydrous.
Adipose triglyceride lipase, also known as patatin-like phospholipase domain-containing protein 2 and ATGL, is an enzyme that in humans is encoded by the PNPLA2 gene. [ 5 ] [ 6 ] [ 7 ] ATGL catalyses the first reaction of lipolysis , [ 8 ] where triacylglycerols are hydrolysed to diacylglycerols .