Horigane A, Horiguchi M, Matsumoto T. Metabolism of 2-amino-3-phosphono[3-14C]propionic acid in cell-free preparations of rat liver.
BIOCHIMICA ET BIOPHYSICA ACTA 1979;
584:254-60. [PMID:
435513 DOI:
10.1016/0304-4165(79)90270-8]
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Abstract
Incubation of 2-amino-3-phosphono[3-14C]propionic acid with cell-free preparations of rat liver yielded labelled 3-phosphonopyruvic acid, 2-phosphonoacetaldehyde, 2-aminoethylphosphonic acid and acetaldehyde. No radioactivity was found in phosphoenolpyruvate, pyruvic acid, alanine, and phosphonoacetic acid. When added to the cell-free preparations, 3-phosphonopyruvic acid trapped the radioactivity, resulting in decrease of incorporation of the radioactivity into 2-phosphonoacetaldehyde, 2-aminoethylphosphonic acid and acetaldehyde. Incorporation of the radioactivity into 2-aminoethylphosphonic acid and acetaldehyde was also decreased by 2-phosphonoacetaldehyde. Thus it appears that the main metabolic pathway of 2-amino-3-phosphonopropionic acid is deamination to produce 3-phosphonopyruvic acid which is, in turn, converted to 2-phosphonoacetaldehyde by decarboxylation, followed by both dephosphonylation and amination of the aldehyde to give acetaldehyde and 2-aminoethylphosphonic acid, respectively.
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