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• W4381309328 endingPage "7253" @default.
• W4381309328 startingPage "7236" @default.
• W4381309328 abstract "Abstract Genomic imprinting at the mouse Igf2/H19 locus is controlled by the H19 ICR, within which paternal allele-specific DNA methylation originating in sperm is maintained throughout development in offspring. We previously found that a 2.9 kb transgenic H19 ICR fragment in mice can be methylated de novo after fertilization only when paternally inherited, despite its unmethylated state in sperm. When the 118 bp sequence responsible for this methylation in transgenic mice was deleted from the endogenous H19 ICR, the methylation level of its paternal allele was significantly reduced after fertilization, suggesting the activity involving this 118 bp sequence is required for methylation maintenance at the endogenous locus. Here, we determined protein binding to the 118 bp sequence using an in vitro binding assay and inferred the binding motif to be RCTG by using a series of mutant competitors. Furthermore, we generated H19 ICR transgenic mice with a 5-bp substitution mutation that disrupts the RCTG motifs within the 118 bp sequence, and observed loss of methylation from the paternally inherited transgene. These results indicate that imprinted methylation of the H19 ICR established de novo during the post-fertilization period involves binding of specific factors to distinct sequence motifs within the 118 bp sequence." @default.
• W4381309328 created "2023-06-21" @default.
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• W4381309328 date "2023-06-19" @default.
• W4381309328 modified "2023-10-14" @default.
• W4381309328 title "Five nucleotides found in RCTG motifs are essential for post-fertilization methylation imprinting of the <i>H19</i> ICR in YAC transgenic mice" @default.
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• W4381309328 doi "https://doi.org/10.1093/nar/gkad516" @default.
• W4381309328 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37334871" @default.
• W4381309328 hasPublicationYear "2023" @default.
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