Phytochrome signaling pathway to turn on photomorphogenesis (WP3662)
Arabidopsis thaliana
The pathways activated by phytochromes in Arbabidopsis thaliana de-repress transcription regulators important for photomorphogenesis induction by inhibiting COP1, DET1, and CSN directly and indirectly through HMR. The inhibition represses function of Cul4 ubiquitin ligases. However, HMR is also involved in degradation Phytochrome A in the same pathway. Phytochromes further degrade PIFs in another pathway through HMR activation to inhibit repression of photomorphogenesis. Interaction of both pathways has been proposed through inhibition of HFR1 by COP1/DET1 to increase protein stability of PIFs. This pathway is based on figure 3 from Chen et al.
Authors
AAR&Co , Friederike Ehrhart , Kristina Hanspers , and Eric WeitzActivity
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Cited In
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Organisms
Arabidopsis thalianaCommunities
Annotations
Pathway Ontology
photosignal transduction pathway| Label | Type | Compact URI | Comment |
|---|---|---|---|
| LAF1 | GeneProduct | ensembl:AT4G25560 | |
| HY5 | GeneProduct | ensembl:AT5G11260 | |
| CSN | GeneProduct | ensembl:AT3G61140 | CSN Not Specified |
| PIF1 | GeneProduct | ensembl:AT2G20180 | PIF Not Specified |
| COP1 | GeneProduct | ensembl:AT2G32950 | |
| COP10 | GeneProduct | ensembl:AT3G13550 | |
| HFR1 | GeneProduct | ensembl:AT1G02340 | |
| PHYA | GeneProduct | ensembl:AT1G09570 | |
| SPA | GeneProduct | ensembl:AT2G46340 | SPA Not Specified |
| DET1 | GeneProduct | ensembl:AT4G10180 | |
| DDB1 | GeneProduct | ensembl:AT4G05420 | DDB1 Not Specified |
| CUL4 | GeneProduct | ensembl:AT5G46210 | |
| HMR | GeneProduct | ensembl:AT2G34640 | |
| CUL4 | GeneProduct | ensembl:AT5G46210 | |
| DDB1 | GeneProduct | ensembl:AT4G05420 | DDB1 Not Specified |
| PHYB | GeneProduct | ensembl:AT2G18790 | |
| PHYC | GeneProduct | ensembl:AT5G35840 | |
| PHYE | GeneProduct | ensembl:AT4G18130 | |
| PHYD | GeneProduct | ensembl:AT4G16250 | |
| PIF3 | GeneProduct | ensembl:AT1G09530 | PIF Not Specified |
| PIF4 | GeneProduct | ensembl:AT2G43010 | PIF Not Specified |
| PIF5 | GeneProduct | ensembl:AT3G59060 | PIF Not Specified |
| PIF6 | GeneProduct | ensembl:AT3G62090 | PIF Not Specified |
| HMR | GeneProduct | ensembl:AT2G34640 | |
| PIF7 | Protein | uniprot:Q570R7 | PIF Not Specified |
References
- Phytochrome signaling mechanisms and the control of plant development. Chen M, Chory J. Trends Cell Biol. 2011 Nov;21(11):664–71. PubMed Europe PMC Scholia