title: Genome imprinting regulated by the mouse Polycomb group protein Eed.
abstract: 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.
authors.affiliation: Department 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.
authors.forename: Jesse
authors.initials: J
authors.lastname: Mager
authors.forename: Nathan D
authors.initials: ND
authors.lastname: Montgomery
authors.forename: Fernando Pardo-Manuel
authors.initials: FP
authors.lastname: de Villena
authors.forename: Terry
authors.initials: T
authors.lastname: Magnuson
mesh_terms: D000483:Alleles; D000818:Animals; D001483:Base Sequence; D018899:CpG Islands; D019175:DNA Methylation; D018392:Genomic Imprinting; D006579:Heterozygote; D051379:Mice; D008957:Models, Genetic; D008969:Molecular Sequence Data; D063151:Polycomb Repressive Complex 2; D012097:Repressor Proteins / Q000235:genetics* / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013447:Sulfites / Q000494:pharmacology; D014158:Transcription, Genetic; D014960:X Chromosome
chemical_list: C107275:Eed protein, mouse; D012097:Repressor Proteins; D013447:Sulfites; D063151:Polycomb Repressive Complex 2