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Journal of Bacteriology, April 2006, p. 2730-2734, Vol. 188, No. 7
0021-9193/06/$08.00+0     doi:10.1128/JB.188.7.2730-2734.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

PII-Regulated Arginine Synthesis Controls Accumulation of Cyanophycin in Synechocystis sp. Strain PCC 6803

Mani Maheswaran,1 Karl Ziegler,2 Wolfgang Lockau,2 Martin Hagemann,3 and Karl Forchhammer1*

Institut für Mikrobiologie und Molekularbiologie, Justus-Liebig Universität Giessen, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany,1 Institut für Biologie, Humboldt-Universität zu Berlin, Chausseestr. 117, D-10115 Berlin, Germany,2 Abteilung Pflanzenphysiologie, Universität Rostock, Albert-Einstein-Str. 3, D-18051 Rostock, Germany3

Received 1 December 2005/ Accepted 20 January 2006

Cyanophycin (multi-L-arginyl-poly-L-aspartic acid) is a nitrogen storage polymer found in most cyanobacteria and some heterotrophic bacteria. The cyanobacterium Synechocystis sp. strain PCC 6803 accumulates cyanophycin following a transition from nitrogen-limited to nitrogen-excess conditions. Here we show that the accumulation of cyanophycin depends on the activation of the key enzyme of arginine biosynthesis, N-acetyl-L-glutamate kinase, by signal transduction protein PII.


* Corresponding author. Mailing address: Institut für Mikrobiologie und Molekularbiologie, Justus-Liebig Universität Giessen, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany. Phone: 0049-641-9935545. Fax: 0049-641-9935549. E-mail: Karl.Forchhammer{at}mikro.bio.uni-giessen.de.


Journal of Bacteriology, April 2006, p. 2730-2734, Vol. 188, No. 7
0021-9193/06/$08.00+0     doi:10.1128/JB.188.7.2730-2734.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.




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