Transcriptional repressor. Specifically binds DNA and probably acts by recruiting chromatin remodeling multiprotein complexes. In skeletal myofibers, highly enriched in subsynaptic nuclei at the neuromuscular junctions. Highly expressed in skeletal muscle and ovary (at protein level). Low expression in brain, lung, spleen, liver and heart (at protein level). Not detected in kidney and intestines (at protein level). Also observed in testis and, at lower levels, in stomach and nervous system. Belongs to the krueppel C2H2-type zinc-finger protein family. ZBTB18 subfamily. Extended N-terminus.