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 SamplesRNA-seqs followed by miRNA transfections (miR-124 and miR-155) into four different cell lines( HeLa, HEK293, Huh7, and IMR90). Overall design: There are two biological replicates of RNA-seqs per each miRNA transfection per each sample and there are corresponding mock transfections.
Global analyses of the effect of different cellular contexts on microRNA targeting.
No sample metadata fields
View SamplesWe used microarrays to investigate the global changes of gene expression in B cells of mir-155 Knockout mice.
Global analyses of the effect of different cellular contexts on microRNA targeting.
Specimen part
View SamplesThe aim of this study was to identify differentially-expressed genes in CCR4hi/CXCR3- and CCR4lo CXCR3+ CCR6+ human Th17 cell subsets
Pro-inflammatory human Th17 cells selectively express P-glycoprotein and are refractory to glucocorticoids.
No sample metadata fields
View SamplesThe aim of this study was to characterize the transcriptional signature of MDR1+ human memory T cells isolated from clinically inflamed gut tissue, and compare it to local MDR1- memory T cells
Pro-inflammatory human Th17 cells selectively express P-glycoprotein and are refractory to glucocorticoids.
Specimen part
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
View SamplesThis study provides an evaluation of changes in gene expression associated with dioctyl 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 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 Samples