Human Molecular Genetics Advance Access published online on January 18, 2006
Human Molecular Genetics, doi:10.1093/hmg/ddi485
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1 Department of Biological Sciences, Center for BioModular Multi-scale Systems, Louisiana State University, Baton Rouge, LA 70803; Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
* To whom correspondence should be addressed. In the current study, we analyzed the deposition patterns of macroH2A1 at a number of different genomic loci located in X chromosome and autosomes. MacroH2A1 is preferentially deposited at methylated CpG-rich regions located close to promoters. The macroH2A1 deposition patterns at the methylated CpG islands of several imprinted domains, including the Imprinting Control Regions (ICRs) of Xist, Peg3, H19/Igf2, Gtl2/Dlk1, and Gnas domains, show consistent allele-specificity towards inactive, methylated alleles. The macroH2A1 deposition levels at the ICRs and other Differentially Methylated Regions (DMRs) of these domains are also either higher or comparable to those observed at the inactive X chromosome of female mammals. Overall, our results indicate that besides DNA methylation macroH2A1 is another epigenetic component in the chromatin of ICRs displaying differential association with two parental alleles.
Received November 22, 2005
Revised January 12, 2006
Accepted January 12, 2006
Article
Allele-specific deposition of macroH2A1 in Imprinting Control Regions
Jung Ha Choo 1,
Jeong Do Kim 2,
Jae Hoon Chung 3,
Lisa Stubbs 4,
and
Joomyeong Kim 2 *
2 Department of Biological Sciences, Center for BioModular Multi-scale Systems, Louisiana State University, Baton Rouge, LA 70803
3 Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
4 Genome Biology Division, Lawrence Livermore National Laboratory, Livermore, CA 94551
Joomyeong Kim, E-mail: jkim{at}lsu.edu
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