Zap1 transcription factor controls the expression of genes that regulate zinc homeostasis in Saccharomyces cerevisiae. Zap1 contains seven classical C2H2 zinc fingers. This domain corresponds to zinc finger 1 (zf1) which together with zinc finger 2 (zf2) has been shown to be a responsive transcriptional activator. Both zinc fingers interact cooperatively to stabilize the Zn-binding [1].

1: Solution structure of a Zap1 zinc-responsive domain provides insights into metalloregulatory transcriptional repression in Saccharomyces cerevisiae. Wang Z, Feng LS, Matskevich V, Venkataraman K, Parasuram P, Laity JH; J Mol Biol. 2006;357:1167-1183. PMID:16483601