Domanda del libro di testo
What is the structure of the ⍺-keto acid formed from transamination of the following amino acids?
a. Glutamic acid
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Ch.25 Protein and Amino Acid Metabolism
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 25, Problema 25
In general, how does oxidative deamination differ from transamination?
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Oxidative deamination and transamination are two processes involved in amino acid metabolism. Begin by understanding that both processes deal with the removal or transfer of the amino group (-NH₂) from amino acids, but they differ in their mechanisms and outcomes.
In oxidative deamination, the amino group of an amino acid is removed and converted into ammonia (NH₃). This process typically involves the oxidation of the amino acid, often catalyzed by enzymes like glutamate dehydrogenase. The reaction also produces a keto acid and requires cofactors such as NAD⁺ or NADP⁺.
In transamination, the amino group from one amino acid is transferred to a keto acid, forming a new amino acid and a new keto acid. This reaction is catalyzed by transaminase (or aminotransferase) enzymes and requires the coenzyme pyridoxal phosphate (PLP).
The key difference is that oxidative deamination results in the release of free ammonia, which can be toxic and is typically processed further in the urea cycle, while transamination does not release free ammonia but instead facilitates the interconversion of amino acids and keto acids.
To summarize, oxidative deamination is a process of amino group removal with ammonia release, while transamination is a transfer of the amino group to another molecule without releasing free ammonia. Both processes are crucial for nitrogen metabolism in the body.
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Oxidative Deamination
Oxidative deamination is a biochemical process where an amino group is removed from an amino acid, resulting in the formation of a corresponding keto acid and ammonia. This reaction typically occurs in the liver and is crucial for the metabolism of amino acids, allowing the body to convert excess amino acids into energy or other compounds. The process is catalyzed by enzymes known as deaminases.
Transamination
Transamination is a process that involves the transfer of an amino group from one amino acid to a keto acid, forming a new amino acid and a new keto acid. This reaction is essential for the synthesis of non-essential amino acids and is facilitated by enzymes called transaminases or aminotransferases. Transamination plays a vital role in amino acid metabolism and nitrogen balance in the body.
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3:03
Amino Acid Catabolism: Amino Group Example 2
Metabolic Pathways
Metabolic pathways are series of chemical reactions occurring within a cell that lead to the conversion of substrates into products. Both oxidative deamination and transamination are integral parts of amino acid metabolism, influencing how the body utilizes proteins for energy, synthesizes new compounds, and maintains nitrogen balance. Understanding these pathways is essential for grasping how the body processes nutrients and manages waste.
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0:52Metabolic Pathways Concept 2
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Write the structure of the ⍺-keto acid produced by oxidative deamination of the following amino acids:
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a. Leucine
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