Abstract
Application of L-α-aminooxy-β-phenylpropionic acid (L-AOPP), a potent and specific competitive inhibitor of L-phenylalanine ammonia-lyase (PAL), to an anthocyanin-producing cell suspension culture ofDaucus carota results in a dramatic increase in extractable PAL activity and an accumulation of phenylalanine (Noé et al., 1980, Planta149, 283–287). Using an immunoprecipitation technique, evidence was obtained that the increase in PAL activity the result of de-novo synthesis. The activity of the other enzymes of the general phenylpropanoid metabolism, e.g., trans-cinnamate 4-hydroxylase and hydroxycinnamate: CoA ligase, were not affected by L-AOPP. This result strongly supports the view that PAL is regulated independently.
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Abbreviations
- CAH:
-
trans-cinnamate 4-hydroxylase
- L-AOPP:
-
L-α-aminooxy-β-phenylpropionic acid
- PAL:
-
L-phenylalanine ammonia-lyase
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Noé, W., Seitz, H.U. Induction of de novo synthesis of phenylalanine ammonia-lyase by L-α-aminooxy-β-phenylpropionic acid in suspension cultures ofDaucus carota L.. Planta 154, 454–458 (1982). https://doi.org/10.1007/BF01267813
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DOI: https://doi.org/10.1007/BF01267813