DNA-binding transcriptional repressor involved in response to toxic agents such as ribonucleotide reductase inhibitor, hydroxyurea (HU). Down-regulated at low calcium levels. Phosphorylated during genotoxic stress. DNA damage induces phosphorylation by SNF1 or the MEC1 pathway and leads to its inactivation, which allows induction of damage response genes. Belongs to the creA/MIG C2H2-type zinc-finger protein family.