P300/CBP strongly-dependent group 1 enhancer GRCh37_chr4:77702656-77703855
RGD ID:
38667736
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. It was validated as an active enhancer by the STARR-seq (self-transcribing active regulatory region sequencing) massively parallel reporter assay (MPRA) in HCT116 colorectal carcinoma cells, where it was defined as a group 1 enhancer that depends on the BRD2, BRD4, P300/CBP, MED14 and CDK7 cofactors, with strong dependence on P300/CBP. A subregion was also validated as a functional enhancer by Sharpr-MPRA (Systematic high-resolution activation and repression profiling with reporter tiling using massively parallel reporter assays) in HepG2 liver carcinoma cells (group: HepG2 Activating non-DNase unmatched - State 8:EnhW, candidate weak enhancer and open chromatin). Another subregion was shown to be an enhancer by ChIP-STARR-seq in naive human embryonic stem cells, where it is marked by the H3K27ac histone modification. This locus also includes an accessible chromatin subregion that was validated as an enhancer based on its ability to activate an origin of replication minimal core promoter by the ATAC-STARR-seq (assay for transposase-accessible chromatin with self-transcribing active regulatory region sequencing) MPRA in GM12878 lymphoblastoid cells. [provided by RefSeq, May 2023]