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Allele-specific enhancer interaction at the Peg3 imprinted domain


Autoři: Joomyeong Kim aff001;  Wesley D. Frey aff001;  Kaustubh Sharma aff001;  Subash Ghimire aff001;  Ryoichi Teruyama aff001;  Lisa Stubbs aff002
Působiště autorů: Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, United States of America aff001;  Cell and Developmental Biology, Institute for Genomic Biology, University of Illinois, Urbana, Illinois, United States of America aff002
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0224287

Souhrn

The parental allele specificity of mammalian imprinted genes has been evolutionarily well conserved, although its functional constraints and associated mechanisms are not fully understood. In the current study, we generated a mouse mutant with switched active alleles driving the switch from paternal-to-maternal expression for Peg3 and the maternal-to-paternal expression for Zim1. The expression levels of Peg3 and Zim1, but not the spatial expression patterns, within the brain showed clear differences between wild type and mutant animals. We identified putative enhancers localized upstream of Peg3 that displayed allele-biased DNA methylation, and that also participate in allele-biased chromosomal conformations with regional promoters. Most importantly, these data suggest for the first time that long-distance enhancers may contribute to allelic expression within imprinted domains through allele-biased interactions with regional promoters.

Klíčová slova:

DNA isolation – DNA methylation – Genomic imprinting – Hypothalamus – Immunostaining – Mammalian genomics – Polymerase chain reaction – BAC cloning


Zdroje

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