Prab: CSV import

2025-02-17T01:53:43Z

CSV import

← Older revision		Revision as of 01:53, 17 February 2025
Line 47:		Line 47:
	[[Category:Biochemistry]]		[[Category:Biochemistry]]
	[[Category:Metabolism]]		[[Category:Metabolism]]

			= Acyl-CoA =
			<gallery>
			File:Acyl-CoA2.svg\|Diagram of Acyl-CoA structure
			File:Beta_Oxidation_Process.png\|Illustration of the Beta Oxidation Process
			</gallery>

Prab: CSV import

2025-02-11T21:47:06Z

CSV import

New page

Acyl-CoA

[[File:Acyl-CoA2.svg|thumb|right|Diagram of Acyl-CoA structure]]

'''Acyl-CoA''' is a group of coenzymes involved in the metabolism of fatty acids. They are derivatives of [[coenzyme A]] (CoA) and play a crucial role in the [[beta-oxidation]] pathway, which is the process of breaking down fatty acids to produce [[acetyl-CoA]], a key molecule in energy production.

==Structure==
Acyl-CoA consists of a fatty acid chain attached to coenzyme A. The fatty acid chain can vary in length, typically ranging from 2 to 30 carbon atoms. The attachment occurs through a thioester bond between the carboxyl group of the fatty acid and the thiol group of coenzyme A.

==Function==
Acyl-CoA molecules are essential intermediates in several metabolic pathways:

* '''Beta-oxidation''': Acyl-CoA is the substrate for the beta-oxidation pathway, where it undergoes a series of enzymatic reactions to produce acetyl-CoA, NADH, and FADH2. These products are then used in the [[citric acid cycle]] and [[electron transport chain]] to generate [[ATP]].

* '''Lipid biosynthesis''': Acyl-CoA is also involved in the synthesis of complex lipids, such as [[phospholipids]] and [[triglycerides]].

* '''Ketogenesis''': In the liver, acyl-CoA can be converted into [[ketone bodies]] during periods of fasting or low carbohydrate intake.

==Beta-Oxidation Process==
[[File:Beta_Oxidation_Process.png|thumb|right|Illustration of the beta-oxidation process]]

The beta-oxidation of fatty acids occurs in the [[mitochondria]] and involves the following steps:

1. '''Activation''': Fatty acids are activated to form acyl-CoA by the enzyme [[acyl-CoA synthetase]]. This reaction requires ATP and occurs in the cytosol.

2. '''Transport''': The acyl-CoA is transported into the mitochondria via the [[carnitine shuttle]].

3. '''Oxidation''': The acyl-CoA undergoes a series of four reactions: dehydrogenation, hydration, another dehydrogenation, and thiolysis. These reactions shorten the fatty acid chain by two carbon atoms, releasing acetyl-CoA.

4. '''Repetition''': The shortened acyl-CoA re-enters the cycle until the entire fatty acid is converted into acetyl-CoA units.

==Clinical Significance==
Defects in the metabolism of acyl-CoA can lead to metabolic disorders such as [[medium-chain acyl-CoA dehydrogenase deficiency]] (MCADD) and other fatty acid oxidation disorders. These conditions can result in hypoglycemia, muscle weakness, and other symptoms due to impaired energy production.

==Related Pages==
* [[Coenzyme A]]
* [[Fatty acid metabolism]]
* [[Beta-oxidation]]
* [[Citric acid cycle]]

==Gallery==
<gallery>
File:Acyl-CoA2.svg|Diagram of Acyl-CoA structure
File:Beta_Oxidation_Process.png|Illustration of the beta-oxidation process
</gallery>

[[Category:Biochemistry]]
[[Category:Metabolism]]

Acyl-CoA - Revision history

Prab: CSV import

Prab: CSV import