Protein function
Encodes a light-labile photoreceptor.
Phenotype
Multiple mutant: phyB and
phyE mutations enhance the early flowering-time phenotype of
phyB single mutant.
[Devlin et al., 1998] Single mutant: phye single mutant is early flowering under SD conditions only.
[Clack et al., 2009] Function:Regulatory photoreceptor which exists in two forms that are reversibly interconvertible by light: the Pr form that absorbs maximally in the red region of the spectrum and the Pfr form that absorbs maximally in the far-red region. Photoconversion of Pr to Pfr induces an array of morphogenic responses, whereas reconversion of Pfr to Pr cancels the induction of those responses. Pfr controls the expression of a number of nuclear genes including those encoding the small subunit of ribulose-bisphosphate carboxylase, chlorophyll A/B binding protein, protochlorophyllide reductase, rRNA, etc. It also controls the expression of its own gene(s) in a negative feedback fashion.
[Data from UniProt]
Regulators, targets and interactors
Downstream actors
Upstream actors
Protein-protein interactions
PIF3 --
[Clack et al., 2009] --
[View TAIR record]PHYD --
[Clack et al., 2009] --
[View TAIR record] PHYB --
[Clack et al., 2009] --
[View TAIR record]PHYC --
[Clack et al., 2009] --
[View TAIR record]