NDLI: Gibberellin-Mediated Proteasome-Dependent Degradation of the Barley DELLA Protein SLN1 Repressor

Content Provider	PubMed Central
Author	Fu, Xiangdong Richards, Donald E. Ait Ali, Tahar Hynes, Llewelyn W. Helen, Ougham Peng, Jinrong Harberd, Nicholas P.
Copyright Year	2002
Abstract	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 α-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.
Related Links	http://dx.doi.org/10.1105/tpc.006197
Starting Page	3191
File Format	PDF
ISSN	1532298X
e-ISSN	1532298X
Journal	The Plant Cell
Issue Number	12
Volume Number	14
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2002-12-01
Access Restriction	Open
Rights Holder	American Society of Plant Biologists
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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Gibberellin-mediated proteasome-dependent degradation of the barley DELLA protein SLN1 repressor (2002)

Gibberellin-mediated proteasomedependent degradation of the barley della protein sln1 repressor. Plant cell 14 (2002).

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