BRD4-independent group 4 enhancer GRCh37_chr20:25218064-25219263
RGD ID:
38604124
Description:
This genomic sequence was predicted to be a transcriptional regulatory region based on chromatin state analysis from the ENCODE (ENCyclopedia Of DNA Elements) project. A subregion was validated as an active enhancer by the STARR-seq (self-transcribing active regulatory region sequencing) massively parallel reporter assay in HCT116 colorectal carcinoma cells, where it was defined as a group 4 enhancer that depends on the BRD2, P300/CBP, MED14 and CDK7 cofactors, but it has limited or no dependence on the BRD4 bromodomain protein. A subregion was also validated as an enhancer by Sharpr-MPRA (Systematic high-resolution activation and repression profiling with reporter tiling using massively parallel reporter assays) in both HepG2 liver carcinoma cells (group: HepG2 Activating DNase unmatched - State 4:PromP, inactive/poised promoter, highly conserved) and K562 erythroleukemia cells (group: K562 Activating DNase matched - State 5:Enh, candidate strong enhancer, open chromatin). Another subregion was also validated as an enhancer by ChIP-STARR-seq in primed human embryonic stem cells, where it is marked by the H3K27ac and H3K4me1 histone modifications. [provided by RefSeq, Jan 2023]