Functions as a sequence-specific transcriptional repressor. Interacts with TRIM28; enhances the transcriptional repressor activity. Specifically expressed in heart with a weaker expression also detected in skeletal muscle. Primarily detected in 34 day-old embryos. Widely expressed at different levels during embryonic development where it is predominantly expressed in cerebellum, kidney, and cerebrum and to a lesser extent in lung, heart, skeletal muscle, tongue, and adrenal gland. Belongs to the krueppel C2H2-type zinc-finger protein family.