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Journal of Bacteriology, March 1999, p. 1931-1933, Vol. 181, No. 6
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Sugar- and Nitrogen-Dependent Regulation of an Amanita muscaria Phenylalanine Ammonium Lyase Gene

U. Nehls,* M. Ecke, and R. Hampp

Universität Tübingen, Botanisches Institut, Physiologische Ökologie der Pflanzen, 72076 Tübingen, Germany

Received 9 November 1998/Accepted 12 January 1999

The cDNA of a key enzyme of secondary metabolism, phenylalanine ammonium lyase, was identified for an ectomycorrhizal fungus by differential screening of a mycorrhizal library. The gene was highly expressed in hyphae grown at low external monosaccharide concentrations, but its expression was 30-fold reduced at elevated concentrations. Gene repression was regulated by hexokinase.

* Corresponding author. Mailing address: Universität Tübingen, Botanisches Institut, Physiologische Ökologie der Pflanzen, Auf der Morgenstelle 1, 72076 Tübingen, Germany. Phone: (49) 7071 2977657. Fax: (49) 7071 295635. E-mail: uwe.nehls{at}uni-tuebingen.de.

Journal of Bacteriology, March 1999, p. 1931-1933, Vol. 181, No. 6
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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