Detailed gene information

Genes [306]




PHYA
PHYTOCHROME A
TAIR: AT1G09570
UNIPROT: P14712
NOWOMICS: View List

Publications

Sharrock R A et al., 1989, Genes Dev.
Boylan M T et al., 1991, Proc. Natl. Acad. Sci. U.S.A.
Whitelam G C et al., 1993, Plant Cell
Johnson E et al., 1994, Plant Physiol.
Bagnall D J et al., 1995, Plant Physiol.
Somers D E et al., 1995, Plant J.
Somers D E et al., 1998, Science
Tepperman J M et al., 2001, Proc. Natl. Acad. Sci. U.S.A.
Mockler T et al., 2003, Proc. Natl. Acad. Sci. U.S.A.

Appears in the following schemes

Photoperiod pathway
Time-course regulation of photoperiodic pathway

Protein function

Encodes a light-labile photoreceptor.

Phenotype

Overexpressor:
PHYA overexpressor is early flowering under both SD and LD conditions. [Bagnall et al., 1995]

Single mutant:
phya single mutant is slightly late flowering under both SD and LD conditions. (The flowering-time phenotype is dependent on the R/FR ratio). [Johnson et al., 1994][Monte et al., 2003][Halliday et al., 2003]

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 morphogenetic 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. Involved in the flowering time regulation. [Data from UniProt]

Regulators, targets and interactors

Downstream actors

causality
CO -- [Valverde et al., 2004] -- [View TAIR record]



Upstream actors


Protein-protein interactions

PIF3 -- [Clack et al., 2009] -- [View TAIR record]

PHYA -- [Clack et al., 2009] -- [View TAIR record]


PHYA -- [Clack et al., 2009] -- [View TAIR record]



PHYA interaction network

Downstream and upstream flowering-related genes

Physical interactions with other flowering-related proteins