Abstract:
:The imprinted U2af1-rs1 gene that maps to mouse chromosome 11 is predominately expressed from the paternal allele. We examined the methylation of genomic sequences in and around the U2af1-rs1 locus to establish the extent of sequence modifications that accompanied the silencing of the maternal allele. The analysis of HapII or HhaI sites showed that the silent maternal allele was hypermethylated in a block of CpG sequences that covered more than 10 kb. By comparison, the expressed paternal allele was unmethylated from a CpG island upstream of the transcribed region through 2 kb. An analysis of DNaseI hypersensitivity of a putative promoter of U2af1-rs1 showed an open chromatin conformation only on the unmethylated, expressed paternal allele. These results suggest that allele-specific hypermethylation covering the gene and its upstream CpG island plays a role in maternal allele repression of U2af1-rs1, which is reflected in altered chromatin conformation of DNaseI hypersensitive sites.
journal_name
Genomicsjournal_title
Genomicsauthors
Shibata H,Yoshino K,Sunahara S,Gondo Y,Katsuki M,Ueda T,Kamiya M,Muramatsu M,Murakami Y,Kalcheva I,Plass C,Chapman VM,Hayashizaki Ydoi
10.1006/geno.1996.0348subject
Has Abstractpub_date
1996-07-01 00:00:00pages
248-52issue
1eissn
0888-7543issn
1089-8646pii
S0888-7543(96)90348-1journal_volume
35pub_type
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