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Arginine: beyond protein.

Sidney M Morris1

  • 1Department of Molecular Genetics and Biochemistry, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA. smorris@pitt.edu

The American Journal of Clinical Nutrition
|February 14, 2006
PubMed
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Arginine is a versatile amino acid crucial for human health. Its complex metabolism and gene regulation are not fully understood, highlighting areas needing further research in arginine pathways.

Area of Science:

  • Biochemistry
  • Human Metabolism
  • Molecular Biology

Background:

  • Arginine is a semiessential amino acid with diverse metabolic roles.
  • It serves as a precursor for vital compounds like urea and nitric oxide.
  • Arginine metabolism pathways are complex and not fully elucidated.

Purpose of the Study:

  • To provide an overview of selected aspects of arginine metabolism.
  • To highlight areas where knowledge of arginine metabolism is incomplete.
  • To discuss the regulatory role of arginine availability on gene expression.

Main Methods:

  • Literature review of arginine metabolism pathways.
  • Analysis of gene expression regulation by arginine availability.
  • Synthesis of current understanding and identification of knowledge gaps.

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Main Results:

  • Arginine is a precursor to urea, nitric oxide, polyamines, proline, glutamate, creatine, and agmatine.
  • Limited arginine availability can selectively alter gene expression related to its own metabolism.
  • Significant gaps exist in the comprehensive understanding of arginine metabolic networks.

Conclusions:

  • Arginine metabolism is intricate and involves complex regulatory mechanisms.
  • Further research is essential to fully comprehend arginine's role in human health and disease.
  • Understanding these pathways is critical for addressing metabolic disorders.