How does glutamine amidotransferase contribute to amino acid metabolism?

How does glutamine amidotransferase contribute to amino acid metabolism?

• A. By facilitating urea synthesis
• B. By forming amino acids from alpha-keto acids
• C. By transferring amino groups to keto acids
• D. By converting amino acids back to nitrogen

Answer: (C)

Glutamine amidotransferase plays a crucial role in amino acid metabolism by transferring amino groups to keto acids. This process is fundamental to the synthesis of various amino acids through the transamination reaction, where the amino group from glutamine is transferred to an α-keto acid, forming a new amino acid in the process. This enzymatic activity is vital for maintaining nitrogen balance in the body and is involved in the production of non-essential amino acids that can be synthesized from simpler carbon skeletons. Glutamine itself serves as an important nitrogen donor in this reaction, highlighting the significance of glutamine amidotransferase in amino acid biosynthesis and overall nitrogen metabolism. The ability of the enzyme to facilitate these transfers makes it central to the biochemical pathways that allow cells to adapt to various metabolic needs.

Glutamine amidotransferase plays a crucial role in amino acid metabolism by transferring amino groups to keto acids. This process is fundamental to the synthesis of various amino acids through the transamination reaction, where the amino group from glutamine is transferred to an α-keto acid, forming a new amino acid in the process. This enzymatic activity is vital for maintaining nitrogen balance in the body and is involved in the production of non-essential amino acids that can be synthesized from simpler carbon skeletons.

Glutamine itself serves as an important nitrogen donor in this reaction, highlighting the significance of glutamine amidotransferase in amino acid biosynthesis and overall nitrogen metabolism. The ability of the enzyme to facilitate these transfers makes it central to the biochemical pathways that allow cells to adapt to various metabolic needs.