Mitosis and thermosensitive mutants in yeast
An exemple using fast temperature controller for S. pombe dynamic cell cycle control
During S. pombe division, the CDC25 protein is required for mitosis completion. At 25°C the CDC25 protein is functional (Fig. 1a) but over 37°C it becomes non-functional or inactivated (Fig. 1b). Such a mutant is called “thermosensitive” and as mitosis only occurs at 25°C, this temperature is termed “permissive”. In these experiments, we used the ElveflowTemp precise temperature control, yet hitherto impossible to achieve, to impact S. pombe physiology during cell division.
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ElveflowTemp induced cell cycle phenotype
During our experimentation, S. pombe thermosensitive mutants (CDC25 ts) were examined under the microscope with a ElveflowTemp platform. This system allowed to selectively modify the temperature of yeast samples between 25°C and 37°C resulting in a reversible arrest of mitosis.
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This application note refers to:
G. Velve Casquillas, C. Fu, M Le Berre, J. Cramer, S. Meance, A. Plecis, D. Baigl, JJ. Greffet, Y. Chen, M. Piel and PT. Tran Fast microfluidic temperature control for high resolution live cell imaging, Lab on a chip 2010