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A conserved MYB transcription factor involved in phosphate starvation signaling both in vascular plants and in unicellular algae.
PHR1-binding sequences are present in the promoter of Pi starvation-responsive structural genes, indicating that this protein acts downstream in the Pi starvation signaling pathway.
A Central Regulatory System Largely Controls Transcriptional Activation and Repression Responses to Phosphate Starvation in Arabidopsis
- Regla Bustos, Gabriel Castrillo, J. Paz-Ares
- Biology, Environmental SciencePLoS genetics
- 1 September 2010
Plants respond to different stresses by inducing or repressing transcription of partially overlapping sets of genes. In Arabidopsis, the PHR1 transcription factor (TF) has an important role in the…
Structural Insight into Partner Specificity and Phosphoryl Transfer in Two-Component Signal Transduction
The COP1-SPA1 interaction defines a critical step in phytochrome A-mediated regulation of HY5 activity.
It is reported that COP1 acts as part of a large protein complex and interacts with SPA1 in a light-dependent manner and defines a critical step in coordinating COP1-mediated ubiquitination and subsequent degradation of HY5 with PHYA signaling.
Suggested guidelines for the diagnosis and management of urea cycle disorders
These guidelines aim at providing a trans-European consensus to guide practitioners, set standards of care and help awareness campaigns, and help to harmonise practice, set common standards and spread good practices with a positive impact on the outcomes of UCD patients.
COP1 and ELF3 control circadian function and photoperiodic flowering by regulating GI stability.
Influence of cytokinins on the expression of phosphate starvation responsive genes in Arabidopsis.
- A. C. Martin, J. C. del Pozo, J. Paz-Ares
- Environmental Science, BiologyThe Plant journal : for cell and molecular…
- 1 December 2000
The results raise the possibility that cytokinins may be involved in the negative modulation of long-distance, systemically controlled Pi starvation responses, which are dependent on whole-plant Pi status.
Arabidopsis COP10 forms a complex with DDB1 and DET1 in vivo and enhances the activity of ubiquitin conjugating enzymes.
The data suggests that COP10, along with COP1 and the CSN, promotes the degradation of positive regulators of photomorphogenesis, such as the transcription factor HY5, via the ubiquitin/26S proteasome system, and the CDD complex may act as a ubiquitylation-promoting factor to regulatePhotomorphogenesis.
LZF1/SALT TOLERANCE HOMOLOG3, an Arabidopsis B-Box Protein Involved in Light-Dependent Development and Gene Expression, Undergoes COP1-Mediated Ubiquitination[W]
STH3 is identified as a positive regulator of photomorphogenesis acting in concert with STH2 and HY5, while also being a target of COP1-mediated ubiquitination.
Light and the E3 ubiquitin ligase COP1/SPA control the protein stability of the MYB transcription factors PAP1 and PAP2 involved in anthocyanin accumulation in Arabidopsis.
- Alexander Maier, Andrea Schrader, U. Hoecker
- Environmental ScienceThe Plant journal : for cell and molecular…
- 1 May 2013
These findings have identified mechanisms via which the COP1/SPA complex controls anthocyanin levels in Arabidopsis that may be useful for applications in biotechnology directed towards increasing anthocianin content in plants.