Binds DNA and activates transcription of CYP11A1. Interaction with CREBBP and EP300 results in a synergistic transcriptional activation of CYP11A1. {ECO:0000269|PubMed:11349124, ECO:0000269|PubMed:16371131}. This is the function of Ensembl gene identifier ENSG00000124496 (TRERF1, transcriptional regulating factor 1).