Function: May function as a transcription factor. Seems to repress transcription. PTM: Phosphorylated upon DNA damage, probably by ATM or ATR. PTM: Sumoylated. similarity: Belongs to the krueppel C2H2-type zinc-finger protein family. similarity: Contains 1 SCAN box domain. similarity: Contains 4 C2H2-type zinc fingers. tissue specificity: Expressed in many tissues except in heart.