Post-translational modifications of proteins by Small Ubiquitin-like Modifiers (SUMOs) regulate protein degradation and localization, protein-protein interaction, and transcriptional activity. SUMO E3 ligase functions are executed by SIZ1/SIZ2 in yeast and PIAS family members in human. The Arabidopsis genome contains only one gene, SIZ1, that is orthologous to yeast SIZ1/SIZ2. Here, we show that the Arabidopsis SIZ1 interacts with SUM1 and SCE1a, the SUMO E2 conjugating enzyme. Compared to WT, the null mutant siz-1-3 is smaller in statue because of reduced expression of gene involved in brassinosteroid biosynthesis and signalling. Drought stress induces the accumulation of SUMO-protein conjugates, which is in part dependent on SIZ1 but not on ABA. Mutant plants of siz1-3 have significant lower tolerance to drought stress. Genome wide expression analysis identified about 2,000 Arabidopsis genes that are responsive to drought, and SIZ1 mediates the induction of 600 of these genes by a pathway independent of DREB2A and ABA. SIZ1-dependent, drought-responsive genes include those encoding enzymes of the anthocyanin synthesis pathway and jasmonate response. From these results, we conclude that SIZ1 regulates Arabidopsis development and plays a role in drought stress response probably through the control of gene expression.
The Arabidopsis E3 SUMO ligase SIZ1 regulates plant growth and drought responses.
Age
View SamplesWild type Columbia and serrate-1 globular stage embryos were sequenced in order to profile miRNAs which are expressed in embryogenesis in Arabidopsis thaliana Overall design: Two biological replicates, two conditions
Arabidopsis thaliana miRNAs promote embryo pattern formation beginning in the zygote.
Specimen part, Subject
View SamplesFOXC1 is a critical marker for basal-like breast cancer. To explore the role of FOXC1 in regulation of basal-like breast cancer cell function, we performed microarray assays and discovered that some known cancer-related genes were regulated by FOXC1.
FOXC1 Activates Smoothened-Independent Hedgehog Signaling in Basal-like Breast Cancer.
Specimen part, Cell line
View SamplesThis SuperSeries is composed of the SubSeries listed below.
A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
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A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
View SamplesThis study provides an evaluation of changes in gene expression associated with acetominophen treatment of rat hepatocytes in vitro.
A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
View SamplesThis study provides an evaluation of changes in gene expression associated with sodium valproate treatment of rat hepatocytes in vitro.
A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
View SamplesThis study provides an evaluation of changes in gene expression associated with beta-naphthaflavone treatment of rat hepatocytes in vitro.
A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
View SamplesThis study provides an evaluation of changes in gene expression associated with diisononyl phthalate treatment of rat hepatocytes in vitro.
A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
View SamplesThis study provides an evaluation of changes in gene expression associated with phenobarbital treatment of rat hepatocytes in vitro.
A novel transcriptomics based in vitro method to compare and predict hepatotoxicity based on mode of action.
Sex, Time
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