Project description:The scope of the project is to find DNA binding sites of the DNA binding protein AtDEK3. For the experiments AtDEK3 overexpressor (OE) plants have been obtained. The AtDEK3 was tagged with a CFP-tag. With ChIP the protein was pulled down and eluted DNA was send for sequencing. Gene ontology (GO) term classification of genes enriched for AtDEK3 binding indicated that AtDEK3 target genes are involved in diverse biological processes.
Project description:We characterized the global response of plants carrying a mitochondrial dysfunction induced by the expression of the unedited form of the ATP synthase 9 subunit. The u-ATP9 transgene driven by A9 and Apetala3 promoters induce mitochondrial dysfunction revealed by a decrease in both oxygen uptake and ATP levels, with an increase in ROS and a concomitant oxidative stress response. The transcriptome analysis of young Arabidopsis flowers, validated by RT-PCR and enzymatic or functional tests, show dramatic changes in u-ATP9 plants. Both lines present a modification in the expression of several genes involved in carbon, lipid and cell wall metabolism, suggesting that an important metabolic readjustment occurs in plants with a mitochondrial dysfunction. Interestingly, transcript levels involved in mitochondrial biogenesis, protein synthesis, and degradation are affected. Moreover, several mRNA levels for transcription factors and DNA binding proteins were also changed. Some of them are involved in stress and hormone response, suggesting that several signaling pathways overlap. Indeed, the transcriptome data reveal that the mitochondrial dysfunction dramatically alters genes involved in signaling pathways, including those involved in ethylene, absicic acid and auxin signal transduction. Our data suggest that the mitochondrial dysfunction model used in this rapport may be useful to uncover the retrograde signaling mechanism between the nucleus and mitochondria in plant cells.
Project description:Genomic integrity requires faithful chromosome duplication. Origins of replication are the genomic sites where DNA replication initiates in every cell cycle. There are multiple origins scattered throughout the eukaryotic genome whose genome-wide identification has been a hard challenge, especially in multicellular organisms. Thus, very little is known on the distinctive features of origins in terms of DNA sequence and chromatin context at a genomic scale. As part of a project for profiling replication origins in Arabidopsis thaliana, we have performed ChIP-chip analysis of the binding of ORC1 and CDC6, two proteins involved in initiation of DNA replication. Here, we provide the data of the ORC1-bound and CDC6-bound genomic sites using as control genomic DNA.
Project description:The scope of the project is to find DNA binding sites of the DNA binding protein AtDEK3. For the experiments AtDEK3 overexpressor (OE) plants have been obtained. The AtDEK3 was tagged with a CFP-tag. With ChIP the protein was pulled down and eluted DNA was send for sequencing. Gene ontology (GO) term classification of genes enriched for AtDEK3 binding indicated that AtDEK3 target genes are involved in diverse biological processes. ChIP Seq of three indenpendendt AtDEK3 OE and their respective inputs were used.