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An enzyme from lupin seeds forming alanine derivatives of cytokinins

Tipo de material: TextoTextoSeries ; PhytoChemistry, 22(2), p. 375-381, 1983Trabajos contenidos:
  • Entsch, B
  • Parker, C. W
  • Letham, D. S
Tema(s): Recursos en línea: Resumen: A new enzyme, which catalyses the conversion of the cytokinin zeatin to the alanine conjugate lupinic acid, has been partly purified from developing lupin seed (Lupinus luteus). Paired-ion, reverse phase HPLC was adapted to analyse the enzyme reaction quantitatively. The enzyme used O-acetyl-l-serine as the source of the amino acid residue, and it interacted with substrates in a ping pong bi bi mechanism. A number of adenine derivatives served as substrates, but preference was shown for compounds with high cytokinin activity. The possible role of the enzyme, tentatively called B-(9-cytokinin)alanine synthase or lupinic acid synthase, in the regulation of hormone activity is discussed
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A new enzyme, which catalyses the conversion of the cytokinin zeatin to the alanine conjugate lupinic acid, has been partly purified from developing lupin seed (Lupinus luteus). Paired-ion, reverse phase HPLC was adapted to analyse the enzyme reaction quantitatively. The enzyme used O-acetyl-l-serine as the source of the amino acid residue, and it interacted with substrates in a ping pong bi bi mechanism. A number of adenine derivatives served as substrates, but preference was shown for compounds with high cytokinin activity. The possible role of the enzyme, tentatively called B-(9-cytokinin)alanine synthase or lupinic acid synthase, in the regulation of hormone activity is discussed

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