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Nat Genet. 2003 Apr;33(4):502-7. Epub 2003 Mar 10.

Genome imprinting regulated by the mouse Polycomb group protein Eed.

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  • 1Department of Genetics and Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, 103 Mason Farm Road, Chapel Hill, North Carolina 27599-7264, USA.


Epigenetic regulation is essential for temporal, tissue-specific and parent-of-origin-dependent gene expression. It has recently been found that the mouse Polycomb group (PcG) gene Eed (embryonic ectoderm development) acts to maintain repression of the imprinted X chromosome. Here, we investigated whether Eed is also required for regulation of autosomal imprinted loci. Expression analyses showed that transcripts from the silent alleles of a subset of paternally repressed genes were present in Eed(-/-) embryos. Parent-of-origin methylation was preserved in these embryos, but we observed changes in the methylation status of specific CpGs in differentially methylated regions (DMRs) at affected but not at unaffected loci. These data identify Eed as a member of a new class of trans-acting factors that regulate parent-of-origin expression at imprinted loci.

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  • The need for Eed. [Nat Genet. 2003]
[PubMed - indexed for MEDLINE]
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