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Funck, D, Stadelhofer, B and Koch, W (2008) Ornithine-delta-aminotransferase is essential for arginine catabolism but not for proline biosynthesis. BMC Plant Biol. 8:40
Like many other plant species, Arabidopsis uses arginine (Arg) as a storage and transport form of nitrogen, and proline (Pro) as a compatible solute in the defence against abiotic stresses causing water deprivation. Arg catabolism produces ornithine (Orn) inside mitochondria, which was discussed controversially as a precursor for Pro biosynthesis, alternative to glutamate (Glu).
Arabidopsis/cytology; Arabidopsis/drug effects; Arabidopsis/enzymology; Arginine/metabolism; Genetic Complementation Test; Green Fluorescent Proteins/metabolism; Mitochondria/drug effects; Mitochondria/enzymology; Models, Biological; Mutation/genetics; Ornithine/metabolism; Ornithine-Oxo-Acid Transaminase/metabolism; Phenotype; Proline/biosynthesis; Protein Transport/drug effects; Recombinant Fusion Proteins/metabolism; Sodium Chloride/pharmacology; Urea/metabolism