†Yeast strain MaV203 that contains the Gal4-LacZ reporter or EGY48/pSH-18 (for β-catenin) that contains the LexA-LacZ reporter was transformed with plasmids expressing Gal4DBD- or LexA-DBD-fusion proteins together with plasmids expressing Gal4AD-fusion proteins. Transformed yeast colonies selected in SD medium lacking Leu and Trp (Leu, Trp and Ura for EGY48/pSH-18) were scored for β-galactosidase activity in colony filter lift assays. Interaction is indicated by β-galactosidase activity level. -, +, ++, or +++ indicate no, low, medium or high levels of β-galactosidase activity, respectively. None of the Gal4AD fusions interacted with Gal4DBD alone or with Gal4DBD-p53 (aa 72–390 of mouse p53). The Gal4DBD-parafibromin did not interact with Gal4AD alone or Gal4AD-TAg (aa 87–708 of SV-40 T-antigen).
*Interaction was also positive with parafibromin fused to LexA-DBD (construct from ).