P300/CBP strongly-dependent group 1 enhancer GRCh37_chr12:76371254-76372453
RGD ID:
38634434
Description:
This genomic region was predicted to be a cell type-specific enhancer 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 high-throughput massively parallel reporter assays (MPRAs) in both liver carcinoma HepG2 cells and erythroleukemia K562 cells. The subregion contains a conserved motif for the HNF4 activator, and mutation of the motif results in reduced enhancer activity. This locus also includes two accessible chromatin subregions that were validated as enhancers based on their 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]