c-Jun/c-Fos heterodimers regulate cellular genes via a newly identified class of methylated DNA sequence motifs.
    
    
        
    
    
        
        Nucleic Acids Res. 42, 3059-3072 (2014)
    
    
    
      
      
	
	    CpG methylation in mammalian DNA is known to interfere with gene expression by inhibiting the binding of transactivators to their cognate sequence motifs or recruiting proteins involved in gene repression. An Epstein-Barr virus-encoded transcription factor, Zta, was the first example of a sequence-specific transcription factor that preferentially recognizes and selectively binds DNA sequence motifs with methylated CpG residues, reverses epigenetic silencing and activates gene transcription. The DNA binding domain of Zta is homologous to c-Fos, a member of the cellular AP-1 (activator protein 1) transcription factor family, which regulates cell proliferation and survival, apoptosis, transformation and oncogenesis. We have identified a novel AP-1 binding site termed meAP-1, which contains a CpG dinucleotide. If methylated, meAP-1 sites are preferentially bound by the AP-1 heterodimer c-Jun/c-Fos in vitro and in cellular chromatin in vivo. In activated human primary B cells, c-Jun/c-Fos locates to these methylated elements in promoter regions of transcriptionally activated genes. Reminiscent of the viral Zta protein, c-Jun/c-Fos is the first identified cellular member of the AP-1 family of transactivators that can induce expression of genes with methylated, hence repressed promoters, reversing epigenetic silencing.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Epstein-barr-virus; Chip-seq Data; Cpg Methylation; Binding-sites; Viral Genome; Transcriptional Activation; Protein Complexes; Ap-1 Site; Cells; Recognition
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2014
    
 
    
        Prepublished in Year
        
    
 
    
        HGF-reported in Year
        2014
    
 
    
    
        ISSN (print) / ISBN
        0305-1048
    
 
    
        e-ISSN
        1362-4962
    
 
    
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	    Volume: 42,  
	    Issue: 5,  
	    Pages: 3059-3072 
	    Article Number: ,  
	    Supplement: ,  
	
    
 
    
        
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            Publisher
            Oxford University Press
        
 
        
            Publishing Place
            Oxford
        
 
	
        
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        Reviewing status
        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30203 - Molecular Targets and Therapies
30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health
30201 - Metabolic Health
    
 
    
        Research field(s)
        Immune Response and Infection
Genetics and Epidemiology
Helmholtz Diabetes Center
    
 
    
        PSP Element(s)
        G-501500-001
G-500700-001
G-502200-001
    
 
    
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        Erfassungsdatum
        2014-01-27