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Arabidopsis thaliana

ABSTRACT: Genome-wide analysis of SPL7 regulated genes in Arabidopsis

PROVIDER: PRJNA193223 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR776581.fastq.gz	Fastqsanger.gz
	SRR776582.fastq.gz	Fastqsanger.gz
	SRR776583.fastq.gz	Fastqsanger.gz
	SRR776584.fastq.gz	Fastqsanger.gz
	SRR776585.fastq.gz	Fastqsanger.gz

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Project description:To study the genes regulated by transcription factor SQUAMOSA PROMOTER BINDING PROTEIN-LIKE7 (SPL7) in Arabidopsis thaliana, we conducted chromatin immunoprecipitation-based sequencing (ChIP-seq) in 35S:FALG-SPL7 transgenic plant and spl7 mutant, and genome-wide sequencing-based transcript profiling of Arabidopsis thaliana wild-type plants and of spl7 mutant under MS medium and MS supplement with 5µM CuSO4. These experiments led to the identification of genes that are direct target of SPL7 and genes differentially expressed in an SPL7-dependent or Cu-dependent manner. This study provides a framework for the identification of SPL7 regulated genes towards characterization of SPL7 in copper homeostasis. ChIP-Seq: Chromatin isolation was performed with 7-day-old whole seedlings of spl7 mutant (negative control) and 35S:FALG-SPL7 transgene (sample) grown on standard MS medium under continuous white light according to Bowler et al. (2004). The resuspended chromatin pellet was sonicated at 4°C with a Diagenode Bioruptor set at high intensity for 10 min (30 s on, 30 s off intervals). The DNA was sheared to an average size of approximately 500 bp. Chromatin was immunoprecipitated with FLAG antibody (Sigma) according to the Affymetrix Chromatin Immunoprecipitation Assay Protocol Rev.3. Reverse cross-linked DNA was purified and used for sequencing libraries construction following the manufacture’s protocol (Illumina). RNA-Seq: DNase I-treated total RNA was prepared from 7-day-old whole seedlings of wild type (Col-0) and spl7 mutant grown on standard MS medium and MS supplement with 5µM CuSO4 under continuous white light (WL). First- and second-strand cDNA were generated using SuperScript II and random hexamer primers. Double-stranded cDNA was fragmented by nebulization and used for mRNA library construction following the manufacturer’s protocol (Illumina). Tophat was used to map the sequence reads to the Arabidopsis genome and only uniquely mapped reads were used in subsequent analyses. mRNA profiles of 7-day-old whole seedlings of wild type (Col-0) or spl7 mutant grown on standard MS medium and MS supplement with 5µM CuSO4 under continuous white light (WL) were generated by deep sequencing using illumine HiSeq2000.

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Arabidopsis thaliana

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