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Arabidopsis thaliana

ABSTRACT: Regulation of Oxidative Stress Responses by the Arabidopsis Heat Shock Factor A4A

PROVIDER: PRJNA174789 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR566601.fastq.gz	Fastqsanger.gz
	SRR566602.fastq.gz	Fastqsanger.gz
	SRR566603.fastq.gz	Fastqsanger.gz
	SRR566604.fastq.gz	Fastqsanger.gz

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Transcription profiling of Arabidopsis thaliana hsc70-1/2/3 triple mutant under salt stress

Project description:HSC70 is the cytosolic isoform of plant HSP70. We have found that HSC70 family proteins bind to the heat shock transcription factor A1s (HsfA1s), which are the master regulators of the heat shock response in plants, and suppress their activity. We additionally found that the triple knock out of HSC70s alters responses of Arabidopsis plants to salt stress. To investigate the role of the HSC70s in salt stress responses, we evaluated the effects of the triple knock out on the transcriptome under salt stress.

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Sivery2016 - A mammalian heat shock response model

Project description:Environmental stress, such as oxidative or heat stress, induces the activation of the heat shock response (HSR) and leads to an increase in the heat shock proteins (HSPs) level. These HSPs act as molecular chaperones to maintain cellular proteostasis. Controlled by highly intricate regulatory mechanisms, having stress-induced activation and feedback regulations with multiple partners, the HSR is still incompletely understood. In this context, we propose a minimal molecular model for the gene regulatory network of the HSR that reproduces quantitatively different heat shock experiments both on heat shock factor 1 (HSF1) and HSPs activities. This model, which is based on chemical kinetics laws, is kept with a low dimensionality without altering the biological interpretation of the model dynamics. This simplistic model highlights the titration of HSF1 by chaperones as the guiding line of the network. Moreover, by a steady states analysis of the network, three different temperature stress regimes appear: normal, acute, and chronic, where normal stress corresponds to pseudo thermal adaption. The protein triage that governs the fate of damaged proteins or the different stress regimes are consequences of the titration mechanism. The simplicity of the present model is of interest in order to study detailed modelling of cross regulation between the HSR and other major genetic networks like the cell cycle or the circadian clock. Sivéry, A., Courtade, E., Thommen, Q. (2016). A minimal titration model of the mammalian dynamical heat shock response. Physical biology, 13(6), 066008.

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Project description:Differential regulation of HSFA1s and HSFA2 after heat shock in Arabidopsis

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Project description:Genome-wide mapping of the Arabidopsis thaliana heat shock transcription factor A1b binding sites under non-stress and heat stress conditions [ChIP-seq]

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Project description:Genome-wide mapping of the Arabidopsis thaliana heat shock transcription factor A1b binding sites under non-stress and heat stress conditions [RNA-seq]

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Transcriptional profiling of Arabidopsis thaliana hsc70-1/2/3 triple mutant

Project description:HSC70 is the cytosolic isoform of plant HSP70. We have found that HSC70 family proteins bind to the heat shock transcription factor A1s (HsfA1s), which are the master regulators of the heat shock response in plants, and supress their activity. To investigate the role of HSC70s in the regulation of HsfA1s and heat shock responses, we evaluated the effect of triple knock out of HSC70s on the transcriptome under the normal growth condition.

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