The evolution of tachykinin/tachykinin receptor (TAC/TACR) in vertebrates and molecular identification of the TAC3/TACR3 system in zebrafish (Danio rerio)

► Five TAC and six TACR genes were identified in teleost. ► The teleostean evolutionary history of TAC and TACR genes was clarified. ► Full length of zebrafish TAC3s and TACR3s were cloned. ► The ligand-receptor interactions between NKB peptides and TACR3s were examined.