E2F6 associates with BRG1 in transcriptional regulation.
The E2F6 protein functions as an Rb-independent repressor of gene transcription. We have previously provided evidence suggesting a role for E2F6 in repression of E2F-responsive genes at S phase. Here, we have identified BRG1, the ATPase subunit of the SWI/SNF chromatin-remodeling complex, as an E2F6 interacting protein. Immunoprecipitation experiments demonstrate that BRG1 binds specifically to E2F6 and E2F4 but not the activator E2Fs. E2F6 was also able to interact with BAF155, a BRG1-associated factor, in the SWI/SNF complex. Chromatin immunoprecipitation assays demonstrate the binding of BRG1 coincident with E2F6 on G1/S gene promoters during S phase. Collectively, our studies suggest that E2F6 may recruit BRG1 in transcriptional regulation of genes important for G1/S phase transition of the cell cycle.
Duke Institute for Genome Sciences and Policy, Duke University Medical Center, Durham, North Carolina, USA.
Janet Y
JY
Leung
Joseph R
JR
Nevins
D047369:Chromatin Immunoprecipitation; D004265:DNA Helicases / Q000378:metabolism*; D050687:E2F1 Transcription Factor / Q000235:genetics; D050704:E2F4 Transcription Factor / Q000378:metabolism; D050701:E2F6 Transcription Factor / Q000378:metabolism*; D005786:Gene Expression Regulation; D005799:Genes, Dominant; D006801:Humans; D009687:Nuclear Proteins / Q000378:metabolism*; D011401:Promoter Regions, Genetic; D011485:Protein Binding / Q000235:genetics; D014157:Transcription Factors / Q000378:metabolism*; D014158:Transcription, Genetic; D020798:Two-Hybrid System Techniques
D050687:E2F1 Transcription Factor; D050704:E2F4 Transcription Factor; D050701:E2F6 Transcription Factor; C491744:E2F6 protein, human; D009687:Nuclear Proteins; D014157:Transcription Factors; C084108:SMARCA4 protein, human; D004265:DNA Helicases