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The primary biological functions of carnitine in humans include the following: [8] fatty acid transport across the mitochondrial membrane by forming long-chain acylcarnitine esters which are shuttled into the mitochondria, where they undergo β-oxidation to produce ATP, the cell's main energy currency; [8]
Acetyl-L-carnitine, ALCAR or ALC, is an acetylated form of L-carnitine.It is naturally produced by the human body, and it is available as a dietary supplement. Acetylcarnitine is broken down in the blood by plasma esterases to carnitine which is used by the body to transport fatty acids into the mitochondria for breakdown and ener
It has been purified from many sources, such as Pseudomonas, [30] rat, [31] [32] [33] cow, [34] guinea pig [35] and human. [36] Recombinant human γ-butyrobetaine hydroxylase has also been produced by Escherichia coli [27] and baculoviruses [26] systems. Scheme describing the biosynthetic pathway of L-carnitine in humans.
This disorder disrupts the carnitine shuttle system from moving fatty acids across the mitochondrial membrane, leading to a decrease in fatty acid catabolism. The result is an accumulation of fatty acid within muscles and liver, decreased tolerance to long term exercise, inability to fast for more than a few hours, muscle weakness and wasting ...
Palmitoylcarnitine is an ester derivative of carnitine involved in the metabolism of fatty acids.During the tricarboxylic acid cycle (TCA), fatty acids undergo a process known as β-oxidation to produce energy in the form of ATP. β-oxidation occurs primarily within mitochondria, however the mitochondrial membrane prevents the entry of long chain fatty acids (>C10), so the conversion of fatty ...
Carnitine palmitoyltransferase I (CPT1) also known as carnitine acyltransferase I, CPTI, CAT1, CoA:carnitine acyl transferase (CCAT), or palmitoylCoA transferase I, is a mitochondrial enzyme responsible for the formation of acyl carnitines by catalyzing the transfer of the acyl group of a long-chain fatty acyl-CoA from coenzyme A to l-carnitine.
The enzymatic functions include the synthesis of collagen, carnitine, and neurotransmitters; the synthesis and catabolism of tyrosine; and the metabolism of microsomes. In nonenzymatic functions it acts as a reducing agent, donating electrons to oxidized molecules and preventing oxidation in order to keep iron and copper atoms in their reduced ...
Gamma-butyrobetaine dioxygenase (also known as BBOX, GBBH or γ-butyrobetaine hydroxylase) is an enzyme that in humans is encoded by the BBOX1 gene. [5] [6] Gamma-butyrobetaine dioxygenase catalyses the formation of L-carnitine from gamma-butyrobetaine, the last step in the L-carnitine biosynthesis pathway. [7]
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