ILR1, an Amidohydrolase That Releases Active Indole-3-Acetic Acid from Conjugates
- 23 June 1995
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 268 (5218) , 1745-1748
- https://doi.org/10.1126/science.7792599
Abstract
In plants, the growth regulator indole-3-acetic acid (IAA) is found both free and conjugated to a variety of amino acids, peptides, and carbohydrates. IAA conjugated to leucine has effects in Arabidopsis thaliana similar to those of free IAA. The ilr1 mutant is insensitive to exogenous IAA-Leu and was used to positionally clone the Arabidopsis ILR1 gene. ILR1 encodes a 48-kilodalton protein that cleaves IAA-amino acid conjugates in vitro and is homologous to bacterial amidohydrolase enzymes. DNA sequences similar to that of ILR1 are found in other plant species.Keywords
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