ABSTRACT:
This a model from the article:
Prediction of photoperiodic regulators from quantitative gene circuit models.
Salazar JD, Saithong T, Brown PE, Foreman J, Locke JC, Halliday KJ, Carré IA, Rand DA, Millar AJ Cell
2009 Dec; 139(6): 1170-9 20005809
,
Abstract:
Photoperiod sensors allow physiological adaptation to the changing seasons. The prevalent hypothesis is that day length perception is mediated through coupling of an endogenous rhythm with an external light signal. Sufficient molecular data are available to test this quantitatively in plants, though not yet in mammals. In Arabidopsis, the clock-regulated genes CONSTANS (CO) and FLAVIN, KELCH, F-BOX (FKF1) and their light-sensitive proteins are thought to form an external coincidence sensor. Here, we model the integration of light and timing information by CO, its target gene FLOWERING LOCUS T (FT), and the circadian clock. Among other predictions, our models show that FKF1 activates FT. We demonstrate experimentally that this effect is independent of the known activation of CO by FKF1, thus we locate a major, novel controller of photoperiodism. External coincidence is part of a complex photoperiod sensor: modeling makes this complexity explicit and may thus contribute to crop improvement.
Note:
There are four models described in the paper. This model corresponds to model 3 (which is a combination of model 1 and model 2). The SBML file is redeveloped from Kevin S
This model is same as BIOMD0000000055
, but with revised light function.
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Andrew J Millar 
