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Series GSE7688 Query DataSets for GSE7688
Status Public on Jul 28, 2007
Title Genome-wide mapping and analysis of active promoters in mouse ES cells and adult organs
Organism Mus musculus
Experiment type Expression profiling by array
Genome binding/occupancy profiling by genome tiling array
Summary The analysis of several mammalian genomes has revealed between 20,000 to 30,000 genes in each genome, a number that may seem hard to reconcile with the large number of cell types and complex functions of these organisms. The solution to this paradox partly lies in the large array of transcripts that each gene can potentially generate through usage of alternative promoters and the variable levels of transcripts that each gene produces in different tissues and cell types. Thus, in order to understand the mechanisms that control diverse patterns of gene expression in mammals, it is necessary to accurately define the active promoters and monitor their cell or tissue-dependent activity. Previous high throughput strategies for assaying tissue-specific gene expression have primarily relied on measurements of steady-state transcript levels by microarrays or tag sequencing. Here, we employ a new experimental strategy to identify and characterize tissue specific promoters by integrating genome-wide maps of RNA polymerase II (Pol II) binding, chromatin modifications and gene expression profiles. We applied this strategy to mouse embryonic stem cells (mES), and adult brain, heart, kidney, and liver. Our results delineated 24,363 Pol II binding sites throughout the genome, 91% of which correspond to 5’ end annotation based on known transcripts and cap-analysis of gene expression (CAGE) and can be regarded as promoters. A majority of these experimentally defined promoters are active in all tissues, while only 4,396 can be characterized as tissue-specific using a quantitative measure of Pol II occupancy. In general, Pol II occupancy at these tissue specific promoters is correlated with the presence of active histone modification marks. However, a set of mES- specific promoters display persistent levels of H3K4me3 in non-ES tissues despite undetectable Pol II binding and transcript. Broadly, our results expand the knowledge of tissue-specific mammalian genes and provide a resource for understanding the transcriptional programs in mammalian development and differentiation.
Keywords: ChIP-chip, expression, mouse, brain, heart, kidney, liver, ES
Overall design To map promoters in the mouse genome, we performed 5 genomewide (37 array set) ChIP-chip of Pol II binding in R1 ES cells and brain, heart, kidney, and liver from 10-12 week-old female BL6 mouse.

To validate genome-wide Pol II enriched regions across tissues, we filtered the genome-wide microarray set to a 4-array set which covers Pol II regions bound in any tissue. We repeated Pol II ChIP-chip across tissues using this 4-array set. We also performed (without replicates) ChIP-chip across tissues for H3ac and H3K4me3 using this condensed array set.

To complement our promoter mapping efforts with transcript levels, we performed expression profiling (no replicates) across tissues using Affymetrix 430 v2.0 arrays.
Contributor(s) Li Z, Barrera LO, Smith AD, Arden K, Cavenee W, Zhang MQ, Green R, Ren B
Citation(s) 18042645
Submission date May 02, 2007
Last update date Feb 11, 2019
Contact name Bing Ren
Organization name Ludwig Institute for Cancer Research
Department Department of Cellular and Molecular Medicine
Lab Laboratory of Gene Regulation
Street address 9500 Gilman Drive
City La Jolla
State/province CA
ZIP/Postal code 92093-0653
Country USA
Platforms (43)
GPL1261 [Mouse430_2] Affymetrix Mouse Genome 430 2.0 Array
GPL4931 Nimblegen 1.5M Mouse Condensed Tiling array of mm5 at 100bp resolution v1.0 set 1 of 4
GPL4932 Nimblegen 1.5M Mouse Condensed Tiling array of mm5 at 100bp resolution v1.0 set 2 of 4
Samples (254)
GSM175618 brain H3Ac Nimblegen 14.4M Mouse tiling array of mm5 at 100bp resolution v1.0 1 of 4
GSM175619 brain H3K4me3 Nimblegen 14.4M Mouse tiling array of mm5 at 100bp resolution v1.0 1 of 4
GSM175620 brain Pol2 Nimblegen 14.4M Mouse tiling array of mm5 at 100bp resolution v1.0 1 of 4
BioProject PRJNA99443

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary file Size Download File type/resource
GSE7688_RAW.tar 1.8 Gb (http)(custom) TAR (of CEL, PAIR, TXT)

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