Genome-wide chromatin binding of transcription factor E2F1 in castration resistant prostate cancer (CRPC) cells

Our computational approach identified E2F1 as a collaborative factor for EZH2 in transcriptional regulation of cancer-related genes. This experiment is designed to validate the interaction between E2F1 and EZH2 on the chromatin. By obtaining over 1 billion bases of sequence from chromatin immunoprecipitated DNA, we generated the genome-wide localizations of E2F1 in CRPC cell line LNCaP-abl cells, and found that Indeed, these sites are enriched near the transcription start sites of EZH2-activated genes. Further analysis of the transcription factor motifs enriched at these peaks revealed the enrichement of androgen receptor motif, suggesting a co-activator role for EZH2 in concert with AR. Our work demonstrated a novel funtion of EZH2 in transcriptional activation by directly binding to the chromatin sites that cooperate with AR. Study of the chromatin localizations of PRC2 complex core subunits and different histone marks in 2 cell types