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A very-long-chain fatty acid (VLCFA) is a fatty acid with 22 or more carbons. Their biosynthesis occurs in the endoplasmic reticulum . [ 1 ] VLCFA's can represent up to a few percent of the total fatty acid content of a cell.
Very long-chain acyl-coenzyme A dehydrogenase deficiency is a fatty-acid metabolism disorder which prevents the body from converting certain fats to energy, particularly during periods without food. [1] [2] [3] Those affected by this disorder have inadequate levels of an enzyme that breaks down a group of fats called very long-chain fatty acids.
The protein encoded by this gene is an isozyme of long-chain fatty-acid-coenzyme A ligase family. Although differing in substrate specificity, subcellular localization, and tissue distribution, all isozymes of this family convert free long-chain fatty acids into fatty acyl-CoA esters , and thereby play a key role in lipid biosynthesis and fatty ...
Elongation of very long chain fatty acids protein 4 is a protein that in humans is encoded by the ELOVL4 gene. [5] [6]ELOVL4 is a member of a large family of fatty acid elongases (ELO) that catalyzes the rate-limiting step in the elongation of long chain fatty acids (LC-FA) into very long-chain saturated (VLC-SFA) and polyunsaturated (VLC-PUFA) fatty acids, collectively known as VLC-FA (very ...
Short-chain fatty acids (SCFAs) are fatty acids with aliphatic tails of five or fewer carbons (e.g. butyric acid). [7] Medium-chain fatty acids (MCFAs) are fatty acids with aliphatic tails of 6 to 12 [8] carbons, which can form medium-chain triglycerides. Long-chain fatty acids (LCFAs) are fatty acids with aliphatic tails of 13 to 21 carbons. [9]
Elongase is a generic term for an enzyme that extends the length of fatty acid. The nomenclature is not applied rigorously. Often, elongase refers to enzymes that produce very long chain fatty acids. Sometimes, elongase also includes unsaturases, which introduce C=C double bonds in the backbone. [1]
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