PLANT PHYSIOLOGY , Vol 105, Issue 2 579-583, Copyright © 1994 by American Society of Plant Biologists
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MOLECULAR BIOLOGY AND GENE REGULATION |
Isolation and Characterization of cDNAs Encoding Imidazoleglycerolphosphate Dehydratase from Arabidopsis thaliana
S. Tada, S. Volrath, D. Guyer, A. Scheidegger, J. Ryals, D. Ohta and E. Ward
International Research Laboratories, Ciba (Japan) Ltd., P.O. Box 1, Takarazuka 665 Japan (S.T., A.S., D.O.)
cDNA clones encoding imidazoleglycerolphosphate dehydratase (IGPD; EC
4.2.1.19) from Arabidopsis thaliana were isolated by complementation of a
bacterial auxotroph. The predicted primary translation product shared
significant identity with the corresponding sequences from bacteria and
fungi. As in yeast, the plant enzyme is monofunctional, lacking the
histidinol phosphatase activity present in the Escherichia coli protein.
IGPD mRNA was present in major organs at all developmental stages assayed.
The Arabidopsis genome appears to contain two genes encoding this enzyme,
based on DNA gel blot and polymerase chain reaction analysis.