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Oxime formation between alpha-keto acids and L-canaline.
Archives of Biochemistry and Biophysics
|September 1, 1984
Summary
Canaline quickly forms stable oximes with glyoxylate and other alpha-keto acids. L-amino acid oxidase oxidizes these compounds into isoxazoline-3-carboxylate, releasing ammonia.
Area of Science:
- Biochemistry
- Enzymology
Background:
- Canaline is an amino acid analogue.
- Alpha-keto acids are key metabolic intermediates.
Purpose of the Study:
- To investigate the reaction kinetics of canaline with alpha-keto acids.
- To determine the products of L-canaline oxime oxidation by L-amino acid oxidase.
Main Methods:
- Reaction of canaline with glyoxylate and other alpha-keto acids.
- Oxidation of L-canaline and its oximes using L-amino acid oxidase.
Main Results:
- Canaline reacts rapidly with glyoxylate and slowly with other alpha-keto acids, forming stable oximes.
- Oxidation of L-canaline by L-amino acid oxidase produces isoxazoline-3-carboxylate.
- L-canaline-alpha-keto acid oximes are also substrates for L-amino acid oxidase, yielding isoxazoline-3-carboxylate, alpha-keto acid, and ammonia.
Conclusions:
- Canaline readily forms oximes with alpha-keto acids.
- L-amino acid oxidase efficiently converts these oximes to isoxazoline-3-carboxylate, demonstrating a novel metabolic pathway.