Enables transcription coactivator activity and transcription corepressor activity. Involved in several processes, including determination of adult lifespan; nematode male tail tip morphogenesis; and regulation of gene expression. Acts upstream of or within cellular response to heat. Located in nucleus. Expressed in several structures, including excretory cell; intestine; spermatheca; ventral cord neurons; and vulva. Used to study Alzheimer's disease. Human ortholog(s) of this gene implicated in autosomal dominant intellectual developmental disorder 43. Is an ortholog of human HIVEP1 (HIVEP zinc finger 1); HIVEP2 (HIVEP zinc finger 2); and HIVEP3 (HIVEP zinc finger 3).