Oxidation of Indole-3-acetic Acid-amino Acid Conjugates by Horseradish Peroxidase

Overview

Journal Plant Physiol

Specialty Physiology

Date 1987 Jul 1

PMID 16665529

Citations 3

Authors

R D Park

C K Park

Affiliations

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Abstract

The stability of 21 amino acid conjugates of indole-3-acetic acid (IAA) toward horseradish peroxidase (HRP) was studied. The IAA conjugates of Arg, Ile, Leu, Tyr, and Val were oxidized readily by peroxidase. Those of Ala, beta-Ala, Asp, Cys, Gln, Glu, Gly, and Lys were not degraded and their recovery was above 92% after 1 hour incubation with HRP. A correlation between the stability of IAA conjugates toward peroxidase-catalyzed oxidation and the hydrophobicity of the amino acid moiety conjugated to IAA was demonstrated. Polar amino acid conjugates of IAA are more resistant to HRP-catalyzed oxidation.

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