Suppression of Arabidopsis RING E3 ubiquitin ligase AtATL78 increases tolerance to cold stress and decreases tolerance to drought stress

•AtATL78 is an Arabidopsis plasma-membrane-localized RING E3 ubiquitin ligase.•AtATL78 was up-regulated by cold stress and, in contrast, down-regulated by drought.•Suppression of AtATL78 increases tolerance to cold stress.•Suppression of AtATL78 decreases tolerance to drought stress.•AtATL78 plays o...

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Veröffentlicht in:	FEBS letters 2013-08, Vol.587 (16), p.2584-2590
Hauptverfasser:	Kim, Soo Jin, Kim, Woo Taek
Format:	Artikel
Sprache:	eng
Schlagworte:	3,3′-diaminobenzidine ABA abscisic acid Arabidopsis Arabidopsis - enzymology Arabidopsis Proteins - metabolism Arabidopsis thaliana ABA-insensitive RING protein Arabidopsis thaliana RING domain-of-unknown-function Arabidopsis Tóxicos en Levadura AtAIRP ATL ATL RING E3 Ub ligase AtRDUF C-repeat (CRT)-binding factor CBF Cell Membrane - metabolism cold Cold response cold shock response cold stress Cold Temperature cold tolerance CRWL cut rosette water loss DAB drought Drought response Droughts Gene Expression Regulation, Plant Glucuronidase - metabolism HECT high expression of osmotically responsive gene 1 HOS1 ICE1 inducer of CBF expression 1 Loss-of-function mutant Phenotype Plant Leaves - metabolism Plants, Genetically Modified plasma membrane RD29 reactive oxygen species Reactive Oxygen Species - metabolism really interesting new gene responsive to dehydration 29A RING RNA Interference RNAi knock-down line ROS sGFP soluble green fluorescent protein Stress, Physiological the homologous to E6-AP carboxyl terminus ubiquitin Ubiquitin - metabolism ubiquitin-protein ligase Ubiquitin-Protein Ligases - metabolism water stress
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Zusammenfassung:	•AtATL78 is an Arabidopsis plasma-membrane-localized RING E3 ubiquitin ligase.•AtATL78 was up-regulated by cold stress and, in contrast, down-regulated by drought.•Suppression of AtATL78 increases tolerance to cold stress.•Suppression of AtATL78 decreases tolerance to drought stress.•AtATL78 plays opposing roles in cold and drought stress responses in Arabidopsis. AtATL78 is an Arabidopsis RING E3 ubiquitin ligase. RT-PCR and promoter-GUS assays revealed that AtATL78 was up-regulated by cold stress and down-regulated by drought. AtATL78 was localized at the plasma-membrane. Suppression of AtATL78 increased tolerance to cold stress but decreased tolerance to drought. Our data suggests that AtATL78 is a negative regulator of cold stress response and a positive regulator of drought stress response in Arabidopsis. These results further suggest that AtATL78 plays opposing roles in cold and drought stress responses.
ISSN:	0014-5793 1873-3468
DOI:	10.1016/j.febslet.2013.06.038