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GEO help: Mouse over screen elements for information. |
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| Status |
Public on Oct 20, 2009 |
| Title |
ChIP-chip with antibodies for histone 3 lysine 4 trimethylation in Mll3+/+ and Mll3-/- MEFs and Ptip+/+ and Ptip-/- MEFs |
| Organism |
Mus musculus |
| Experiment type |
Genome binding/occupancy profiling by array
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| Summary |
Global analysis of H3K4 methylation defines MLL family member targets and points to a role for MLL1-mediated H3K4 methylation in the regulation of transcriptional initiation by RNA polymerase II
A common landmark of activated genes is the presence of trimethylation on lysine 4 of histone H3 (H3K4) at promoter regions. The Set1/COMPASS was the founding member and the only H3K4 methylases in S. cerevisiae, however, in mammals at least six H3K4 methylases Set1A/B and MLL1-4 are found in COMPASS-like complexes capable of methylating H3K4. To gain further insight into the different roles and functional targets for the H3K4 methylases, we have undertaken a genome-wide analysis of H3K4 methylation pattern in wild-type Mll1+/+ and Mll1-/- mouse fibroblasts (MEFs). We found that Mll1 is required for the H3K4 trimethylation of less than 5% of promoters carrying this modification. Many of these genes, which include developmental regulators such as Hox genes show decreased levels of RNA polymerase II recruitment and expression concomitant with the loss of H3K4 methylation. Although Mll1 is only required for the methylation of a subset of Hox genes, Menin, a component of the Mll1 and Mll2 complexes, is required for the overwhelming majority of H3K4 methylation at Hox loci. However, the loss of MLL3/4 and/or the Set1 complexes have little to no effect on the Hox loci H3K4 methylation or expression levels in these MEFs. Together these data provide insight into redundancy and specialization of COMPASS-like complexes in mammals and provide evidence on a possible role for Mll1-mediated H3K4 methylation in the regulation of transcriptional initiation.
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| Overall design |
Chromatin Immunoprecipitation was performed with antibodies for histone 3 lysine 4 trimethylation in Mll3+/+ and Mll3-/- mouse embryonic fibroblasts and Ptip+/+ and Ptip-/- mouse embryonic fibroblasts. DNA was hybridized to a custom Agilent tiling array (4x44k format) that covers three of the hox regions (A,B,D) and a collection of other genes (array is identical to array 018680 except for e_ on the ids due to an error with custom array submission to agilent).
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| Contributor(s) |
Wang P, Lin C, Smith ER, Guo H, Sanderson BW, Wu M, Gogol M, Alexander T, Seidel C, Wiedemann LM, Ge K, Krumlauf R, Shilatifard A |
| Citation(s) |
19703992 |
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| Submission date |
Sep 24, 2009 |
| Last update date |
Mar 21, 2012 |
| Contact name |
Pengfei Wang |
| Organization name |
Stowers Institute
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| Lab |
Shilatifard
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| Street address |
1000 E. 50th Street
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| City |
Kansas City |
| State/province |
MO |
| ZIP/Postal code |
64110 |
| Country |
USA |
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| Platforms (1) |
| GPL9287 |
Hox Tiling Array Agilent-018523 (ChIP) |
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| Samples (10)
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| This SubSeries is part of SuperSeries: |
| GSE18258 |
Global analysis of H3K4 methylation |
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| Relations |
| BioProject |
PRJNA123519 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE18263_RAW.tar |
124.8 Mb |
(http)(custom) |
TAR (of TXT) |
| Processed data included within Sample table |
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