A role for the ubiquitin-26S-proteasome pathway in gibberellin signaling.
The gibberellin (GA) signaling pathway, like auxin and jasmonate signaling, uses the ubiquitin-proteasome pathway to control expression through protein degradation. A conserved F-box protein of an SCF E3 ubiquitin ligase is a positive regulator of GA signaling in Arabidopsis and rice. GA apparently stimulates stem elongation by causing this SCF complex to regulate negatively a family of negative regulators of GA response (the DELLA family of putative transcription factors). The DELLA family members AtRGA or (Repressor of ga1-3) and OsSLR1 (SLENDER RICE1) proteins both appear to be subject to GA- induced proteolysis. The need to have the F-box genes AtSLY1 and OsGID2 for this proteolysis suggests that GA causes proteolysis of AtRGA/OsSLR1 via the SCF(AtSLY1/OsGID2) ubiquitin ligase.[1]References
- A role for the ubiquitin-26S-proteasome pathway in gibberellin signaling. Itoh, H., Matsuoka, M., Steber, C.M. Trends Plant Sci. (2003) [Pubmed]
Annotations and hyperlinks in this abstract are from individual authors of WikiGenes or automatically generated by the WikiGenes Data Mining Engine. The abstract is from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.About WikiGenesOpen Access LicencePrivacy PolicyTerms of Useapsburg
