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Reasoning for nuclear phytochrome pool subdivision and kinetic response

This reasoning chain explains the division of nuclear phytochrome into free and sequestered pools in yeast, the effect of their interchange on fast and slow components of light response, and how Pr/Pfr ratios and light wavelength determine activation states and dark reversion kinetics.

Confidence
80%
◑partialactivecomplexity: mid

Reasoning Steps (3)

Nuclear localization and free/sequestered phytochrome pools shape light responseStep 1
Light wavelength and photoconversion cross-sections control Pr/Pfr ratio and dark reversionStep 2
Pr_FHY1/FHL and Pr_PIF3 intermediates partially activate transcriptionStep 3

Source

Synthesis for current paper

Connections (5)

Free and sequestered nuclear phytochrome pools control light response kineticsAssociation
Light wavelength determines Pr and Pfr phytochrome distribution ratioAssociation
Only a fraction of Pfr pool undergoes dark reversionAssociation
Pr_FHY1/FHL intermediate state partially activates transcriptionAssociation
Pr_PIF3 intermediate state partially activates transcription in PhyB systemAssociation