Projects per year
A striking and defining feature of circadian clocks is the small variation in period over a physiological range of temperatures. This is referred to as temperature compensation, although recent work has suggested that the variation observed is a specific, adaptive control of period. Moreover, given that many biological rate constants have a Q(10) of around 2, it is remarkable that such clocks remain rhythmic under significant temperature changes. We introduce a new mathematical model for the Neurospora crassa circadian network incorporating experimental work showing that temperature alters the balance of translation between a short and long form of the FREQUENCY (FRQ) protein. This is used to discuss period control and functionality for the Neurospora system. The model reproduces a broad range of key experimental data on temperature dependence and rhythmicity, both in wild-type and mutant strains. We present a simple mechanism utilising the presence of the FRQ isoforms (isoform switching) by which period control could have evolved, and argue that this regulatory structure may also increase the temperature range where the clock is robustly rhythmic.
|Number of pages||11|
|Journal||Molecular Systems Biology|
|Publication status||Published - Feb 2008|
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- 2 Finished
SynthSys; formerly CSBE: Centre for Systems Biology at Edinburgh
Millar, A., Beggs, J., Ghazal, P., Goryanin, I., Hillston, J., Plotkin, G., Tollervey, D., Walton, A. & Robertson, K.
8/01/07 → 31/12/12
Research Development Fellowship:Professor A J Millar - Mathematical and synthetic models of clock gene regulatory circuits.
15/02/05 → 14/12/07
- 1 Article
Isoform switching facilitates period control in the Neurospora crassa circadian clock - CorrigendumAkman, O. E., Locke, J. C. W., Tang, S., Carre, I., Millar, A. J. & Rand, D. A., Apr 2008, In: Molecular Systems Biology. 4, p. - 1 p., 186.
Research output: Contribution to journal › Article › peer-reviewOpen AccessFile