PEG3 binds to H19-ICR as a transcriptional repressor.
Paternally expressed gene 3 (Peg3) encodes a DNA-binding protein with 12 C2H2 zinc finger motifs. In the current study, we performed ChIP-seq using mouse embryonic fibroblast (MEF) cells. This experiment identified a set of 16 PEG3 genomic targets, the majority of which overlapped with the promoter regions of genes with oocyte expression. These potential downstream genes were upregulated in MEF cells lacking PEG3 protein, suggesting a potential repressor role for PEG3. Our study also identified the imprinting control region (ICR) of H19 as a genomic target. According to the results, PEG3 binds to a specific sequence motif located between the 3rdand 4thCTCF binding sites of the H19-ICR. PEG3 also binds to the active maternal allele of the H19-ICR. The expression levels of H19 were upregulated in MEF cells lacking PEG3, and this upregulation was mainly derived from the maternal allele. This suggests that PEG3 may function as a transcriptional repressor for the maternal allele of H19. Overall, the current study uncovers a potential functional relationship between Peg3 and H19, and also confirms PEG3 as a transcriptional repressor for the identified downstream genes.
a Department of Biological Sciences , Louisiana State University , Baton Rouge , LA , USA.
An
A
Ye
a Department of Biological Sciences , Louisiana State University , Baton Rouge , LA , USA.
Hongzhi
H
He
a Department of Biological Sciences , Louisiana State University , Baton Rouge , LA , USA.
Joomyeong
J
Kim
D000818:Animals; D001665:Binding Sites; D000076246:CCCTC-Binding Factor; D019175:DNA Methylation / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D005260:Female; D018507:Gene Expression Regulation, Developmental; D018392:Genomic Imprinting / Q000235:genetics; D006801:Humans; D051741:Kruppel-Like Transcription Factors / Q000235:genetics* / Q000378:metabolism; D051379:Mice; D009865:Oocytes / Q000254:growth & development / Q000378:metabolism; D011401:Promoter Regions, Genetic / Q000235:genetics; D011485:Protein Binding; D062085:RNA, Long Noncoding / Q000235:genetics*; D012097:Repressor Proteins / Q000235:genetics* / Q000378:metabolism; D016335:Zinc Fingers / Q000235:genetics
D000076246:CCCTC-Binding Factor; C000619697:CTCF protein, human; C000619698:Ctcf protein, mouse; D004268:DNA-Binding Proteins; C094335:H19 long non-coding RNA; D051741:Kruppel-Like Transcription Factors; C097901:Peg3 protein, mouse; D062085:RNA, Long Noncoding; D012097:Repressor Proteins
CTCF; ChIP-seq; H19; Peg3; imprinting control region; transcriptional factor