Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Targets of Ty3 transposition in Saccharomyces cerevisiae

ABSTRACT: The goal of these experiments was to define the targets of Ty3 transposition in Saccharomyces cerevisiae. Ty3 is a retroviruslike element that is found at the transcription initiation site of chromosomal tRNA genes. A Ty3 that can be induced by growth in galactose-containing medium and which was marked by an insertion of HIS3 downstream of the second open reading frame of the element (POL3) was induced to undergo transposition by plating cells onto galactose containing medium and replica-plating onto medium selective for cells that had undergone transposition. These cells were collected, DNA was extracted, and inverse PCR was performed using primers inside the Ty3 element in order to generate a library of insertion sites flanked by Illumina sequence-compatible primers.

ORGANISM(S): Saccharomyces cerevisiae

SUBMITTER: Suzanne Sandmeyer

PROVIDER: E-GEOD-31820 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Retrotransposon profiling of RNA polymerase III initiation sites.

Qi Xiaojie X Daily Kenneth K Nguyen Kim K Wang Haoyi H Mayhew David D Rigor Paul P Forouzan Sholeh S Johnston Mark M Mitra Robi David RD Baldi Pierre P Sandmeyer Suzanne S

Genome research 20120127 4

Although retroviruses are relatively promiscuous in choice of integration sites, retrotransposons can display marked integration specificity. In yeast and slime mold, some retrotransposons are associated with tRNA genes (tDNAs). In the Saccharomyces cerevisiae genome, the long terminal repeat retrotransposon Ty3 is found at RNA polymerase III (Pol III) transcription start sites of tDNAs. Ty1, 2, and 4 elements also cluster in the upstream regions of these genes. To determine the extent to which ...[more]

PMID: 22287102

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Project description:Transcription factors direct gene expression, and so there is much interest in mapping their genome-wide binding locations. M-BM- Current methods do not allow for the multiplexed analysis of TF binding, and this limits their throughput. We describe a novel method for determining the genomic target genes of multiple transcription factors simultaneously. DNA-binding proteins are endowed with the ability to direct transposon insertions into the genome near to where they bind. The transposon becomes a M-bM-^@M-^\Calling CardM-bM-^@M-^] marking the visit of the DNA-binding protein to that location. A unique sequence M-bM-^@M-^\barcodeM-bM-^@M-^] in the transposon matches it to the DNA-binding protein that directed its insertion. The sequences of the DNA flanking the transposon (which reveal where in the genome the transposon landed) and the barcode within the transposon (which identifies the TF that put it there) are determined by massively-parallel DNA sequencing. To demonstrate the methodM-bM-^@M-^Ys feasibility, we determined the genomic targets of eight transcription factors in a single experiment. The Calling Card method promises to significantly reduce the cost and labor needed to determine the genomic targets of many transcription factors in different environmental conditions and genetic backgrounds. These data contain Ty5 insertion sites mapped by an Illumina GAII analyzer in the S. cerevisiae genome for the background strain without any Sir4 present (1 run), in strains expressing Sir4-tagged copies of three well-characterized TFs: Gal4, Leu3, and Gcn4 (1 run each), and a multiplex of eight Sir4-tagged TFs pooled in a single experiment (2 biological replicates), and insertions from the Thi2-Sir4 fusion expressed from its native locus in two conditions (1 run each). The format of each insertions file is [chromosome number] [position of genomic base] [direction of insertion] [number of reads at that position]. Raw sequencing data comes in two varieties. Paired-end data contains a 5 bp barcode at the beginning of read #2. Single-end data contains a 2 bp barcode on the beggining of read #1.

Dataset Information

Targets of Ty3 transposition in Saccharomyces cerevisiae

Publications

Retrotransposon profiling of RNA polymerase III initiation sites.

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