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Sigma factor SigC is required for heat acclimation of the cyanobacterium Synechocystis sp. strain PCC 6803

Tuominen, I. and Pollari, M. and Aquirre von Wobeser, E. and Tyystjärvi, E. and Ibelings, B.W. and Matthijs, H.C.P. and Tyystjärvi, T. (2008) Sigma factor SigC is required for heat acclimation of the cyanobacterium Synechocystis sp. strain PCC 6803. FEBS Letters, 582, 346-350. ISSN 0014-5793.

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Official URL: http://dx.doi.org/10.1016/j.febslet.2007.12.030

Abstract

The role of the primary-like sigma factor SigC was studied in Synechocystis. Under high temperature stress (48 °C) the ΔsigC inactivation strain showed a lower survival rate than the control strain. The ΔsigC strain grew poorly at 43 °C in liquid cultures under normal air. However, change to 3% CO2 enhanced growth of ΔsigC at 43 °C. Differences in expression of many genes related to the carbon concentrating mechanisms between the control and the ΔsigC strain were recorded with a genome-wide DNA microarray. We suggest that low solubility of CO2 at high temperature is one of the factors contributing to the poor thermotolerance of the ΔsigC strain.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:4894
Deposited On:30 Sep 2009 02:00
Last Modified:24 Apr 2012 16:46

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