Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Acts upstream of or within brain development; circulatory system development; and positive regulation of gene expression. Predicted to be located in nucleus. Predicted to be part of PcG protein complex and transcription regulator complex. Predicted to be active in chromatin. Is expressed in several structures, including heart; myotome; nervous system; notochord posterior region; and pronephros. Human ortholog(s) of this gene implicated in congestive heart failure. Orthologous to human YY1 (YY1 transcription factor).