May play an important role in endothelial cell activation. May act as a nuclear transcription factor that negatively regulates the expression of cardiac genes. Induction seems to be correlated with apoptotic cell death in hepatoma cells. {ECO:0000269|PubMed:15805281, ECO:0000269|PubMed:7730328}. This is the function of Ensembl gene identifier ENSG00000148677 (ANKRD1, ankyrin repeat domain 1).