A novel potassium deficiency-induced stimulon in Anabaena torulosa

Alahari, Anuradha ; Apte, Shree Kumar (2004) A novel potassium deficiency-induced stimulon in Anabaena torulosa Journal of Biosciences, 29 (2). pp. 153-161. ISSN 0250-5991

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Official URL: http://ns1.ias.ac.in/jbiosci/june2004/153.pdf

Related URL: http://dx.doi.org/10.1007/BF02703413


Potassium deficiency enhanced the synthesis of fifteen proteins in the nitrogen-fixing cyanobacteriumAnabaena torulosa and of nine proteins inEscherichia coli. These were termed potassium deficiency-induced proteins or PDPs and constitute hitherto unknown potassium deficiency-induced stimulons. Potassium deficiency also enhanced the synthesis of certain osmotic stress-induced proteins. Addition of K+ repressed the synthesis of a majority of the osmotic stress-induced proteins and of PDPs in these bacteria. These proteins contrast with the dinitrogenase reductase of A. torulosa and the glycine betaine-binding protein of E. coli, both of which were osmo-induced to a higher level in potassium-supplemented conditions. The data demonstrate the occurrence of novel potassium deficiency-induced stimulons and a wider role of K+ in regulation of gene expression and stress responses in bacteria.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Anabaena; Escherichia Coli; Potassium Regulation; Stress Proteins
ID Code:778
Deposited On:25 Sep 2010 04:44
Last Modified:16 May 2016 11:58

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