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GEO help: Mouse over screen elements for information. |
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| Status |
Public on Jan 26, 2010 |
| Title |
Genome-wide erasure of DNA methylation in mouse primordial germ cells is affected by Aid deficiency |
| Organism |
Mus musculus |
| Experiment type |
Methylation profiling by high throughput sequencing
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| Summary |
Epigenetic reprogramming including demethylation of DNA occurs in mammalian primordial germ cells (PGCs) and in early embryos, and is important for the erasure of imprints and epimutations, and the return to pluripotency. The extent of this reprogramming and its molecular mechanisms are poorly understood. We previously showed that the cytidine deaminases Aid and Apobec1 can deaminate 5-methylcytosine in vitro and in E coli, and in the mouse are expressed in tissues in which demethylation occurs. Here we profiled DNA methylation throughout the genome by unbiased bisulfite Next Generation Sequencing (BS-Seq) in wildtype and Aid deficient PGCs at E13.5. Wildtype PGCs revealed dramatic genome-wide erasure of methylation to a level below that of methylation deficient (Np95-/-) ES cells, with female PGCs being less methylated than male ones. By contrast, Aid deficient PGCs were up to three times more methylated than wildtype ones; this substantial difference occurred throughout the genome, with introns, intergenic regions and transposons being relatively more methylated than exons. Relative hypermethylation in Aid deficient PGCs was confirmed by analysis of individual loci in the genome. Our results reveal that erasure of DNA methylation in the germ line is a global process, hence limiting the potential for transgenerational epigenetic inheritance. Aid deficiency interferes with genome-wide erasure of DNA methylation patterns, suggesting that Aid has a critical function in epigenetic reprogramming and potentially in restricting the inheritance of epimutations in mammals.
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| Overall design |
Comparison of methylation in wild-type and Aid deficient mouse tissues
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| Contributor(s) |
Popp C, Dean W, Feng S, Cokus SJ, Andrews S, Pellegrini M, Jacobsen SE, Reik W |
| Citation(s) |
20098412 |
| Submission date |
Jan 20, 2010 |
| Last update date |
May 15, 2019 |
| Contact name |
matteo Pellegrini |
| E-mail(s) |
matteop@mcdb.ucla.edu
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| Phone |
310-825-0012
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| Organization name |
UCLA
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| Department |
MCD Biology
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| Lab |
Matteo Pellegrini
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| Street address |
621 Charles Young Drive South
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| City |
Los Angeles |
| State/province |
CA |
| ZIP/Postal code |
90095 |
| Country |
USA |
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| Platforms (2) |
| GPL9185 |
Illumina Genome Analyzer (Mus musculus) |
| GPL9250 |
Illumina Genome Analyzer II (Mus musculus) |
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| Samples (12)
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| Relations |
| SRA |
SRP001825 |
| BioProject |
PRJNA122607 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE19960_RAW.tar |
318.0 Mb |
(http)(custom) |
TAR (of TXT) |
SRA Run Selector |
| Processed data provided as supplementary file |
| Raw data are available in SRA |
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