GrainGenes Reference Report: PLC-14-3191
Reference
PLC-14-3191
Title
Gibberellin-mediated proteasome-dependent degradation of the barley DELLA protein SLN1 repressor
Journal
Plant Cell
Year
2002
Volume
14
Pages
3191-3200
Author
[ Hide all but 1 of 7 ] Fu XD Richards DE Ait-ali T Hynes LW Ougham H Peng JR Harberd NP
Abstract
Summary: DELLA proteins are nuclear repressors of plant gibberellin (GA) responses. Here, we investigate the properties of SLN1, a DELLA protein from barley that is destabilized by GA treatment. Using specific inhibitors of proteasome function, we show that proteasome-mediated protein degradation is necessary for GA-mediated destabilization of SLN1. We also show that GA responses, such as the aleurone alpha-amylase response and seedling leaf extension growth, require proteasome-dependent GA-mediated SLN1 destabilization. In further experiments with protein kinase and protein phosphatase inhibitors, we identify two additional signaling steps that are necessary for GA response and for GA-mediated destabilization of SLN1. Thus, GA signaling involves protein phosphorylation and dephosphorylation steps and promotes the derepression of GA responses via proteasome-dependent destabilization of DELLA repressors
External Databases
Pubmed: 12468736
Keyword
abscisic acid
[ Show all 25 ]
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PLC-14-3191
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||