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Related Concept Videos

Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids01:02

Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids

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Carboxylic acids, upon heating, undergo a decarboxylation reaction by releasing carbon dioxide gas. Monocarboxylic acids do not undergo decarboxylation easily. However, a silver salt of carboxylic acid reacts with bromine or iodine under high temperature to release carbon dioxide gas and forms halide with one less carbon. This reaction is called the Hunsdiecker reaction.
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Regulation of Metabolism01:19

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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Enzymes require additional components for proper function. There are two such classes of molecules: cofactors and coenzymes. Cofactors are metallic ions and coenzymes are non-protein organic molecules. Both of these types of helper molecule can be tightly bound to the enzyme or bound only when the substrate binds.
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Enzymes are proteins made of amino acids. The functional group of each constituent amino acid catalyzes a wide variety of chemical reactions via ionic interactions or acid-base reactions. However, amino acids cannot catalyze oxidation-reduction and group transfer reactions and need to be aided by non-protein components called cofactors. Cofactors are also referred to as the chemical teeth of an enzyme.
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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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Loss of Carboxy Group as CO2: Decarboxylation of Malonic Acid Derivatives01:35

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Just like β-keto acids—which upon thermal decarboxylation form ketones—β-dicarboxylic acids undergo decarboxylation to generate monocarboxylic acids with the liberation of carbon dioxide.
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Quantification of Coenzyme A in Cells and Tissues
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The Pathophysiological Role of CoA.

Aleksandra Czumaj1, Sylwia Szrok-Jurga2, Areta Hebanowska2

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Coenzyme A (CoA) is vital for metabolism, but its concentration and regulation in disease are unclear. This review explores CoA

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Metabolic Regulation

Background:

  • Coenzyme A (CoA) is a crucial acyl carrier in over 100 metabolic reactions.
  • Its role in cellular compartments and pathological conditions requires further investigation.
  • Mechanisms regulating intracellular CoA levels in disease are not fully understood.

Purpose of the Study:

  • To review current knowledge on CoA subcellular concentrations.
  • To elucidate the roles of CoA synthesis and degradation.
  • To examine protein modification via CoAlation and CoA's role in pathology.

Main Methods:

  • Literature review of existing research on CoA metabolism and regulation.
  • Analysis of CoA's involvement in various catabolic and anabolic pathways.
  • Examination of CoAlation as a regulatory mechanism.

Main Results:

  • CoA concentrations vary across subcellular compartments.
  • Dysregulated CoA metabolism is linked to neurodegenerative diseases, cancer, myopathies, and infections.
  • Pantethine, a CoA precursor, shows potential in treating hyperlipidemia.

Conclusions:

  • Understanding CoA's compartmental concentrations and regulatory mechanisms is critical.
  • Altered CoA levels are implicated in diverse pathologies.
  • Pharmacological interventions involving CoA or its precursors may offer therapeutic benefits.