Disruption of the genomic imprint in trans with homologous recombination at Snrpn in ES cells.


Journal Article

In gene targeting studies of the Prader-Willi syndrome (PWS)/Angelman syndrome (AS) domain in mouse ES cells, we recovered only recombinants with the paternal allele for constructs at exons 2 or 3 of the imprinted, maternally silenced Snurf-Snrpn gene. These sites lie close to the imprinting center (IC) for this domain. In contrast, recombinants for Ube3a within the same imprinted domain were recovered with equal frequency on the maternal and paternal alleles. In addition, gene targeting of the paternal allele for Snurf-Snrpn resulted in partial or complete demethylation in trans with activation of expression for the previously silenced maternal allele. The imprint switching of the maternal allele in trans is not readily explained by competition for trans-acting factors and adds to a growing body of evidence indicating homologous association of oppositely imprinted chromatin domains in somatic mammalian cells.

Full Text

Cited Authors

  • Tsai, T-F; Bressler, J; Jiang, Y-H; Beaudet, AL

Published Date

  • December 2003

Published In

Volume / Issue

  • 37 / 4

Start / End Page

  • 151 - 161

PubMed ID

  • 14666508

Pubmed Central ID

  • 14666508

Electronic International Standard Serial Number (EISSN)

  • 1526-968X

International Standard Serial Number (ISSN)

  • 1526-954X

Digital Object Identifier (DOI)

  • 10.1002/gene.10237


  • eng