Matchmaker Gold Yeast Two-Hybrid System

The yeast two-hybrid principle

The yeast two-hybrid principle. A bait protein interacts with the GAL4 recognition sequence (or promoter) upstream of a reporter gene. Transcription of the reporter is activated when a prey protein containing the GAL4 transcriptional activation domain interacts with the bait.

Matchmaker Gold reporter genes

Matchmaker Gold reporter genes. Yeast strain Y2HGold expresses 4 genes from 3 separate GAL4-responsive promoters in response to protein-protein interactions.

Four reporters give the Matchmaker Gold Yeast Two-Hybrid System its high stringency

Four reporters give the Matchmaker Gold Yeast Two-Hybrid System its high stringency. Interacting bait and prey fusion proteins drive the expression of four different reporters from three different GAL4-responsive promoters (M1, G1, and G2), which are stably integrated in the genome of the reporter strain, Y2H Gold. Aureobasidin A (AbA) resistance and the two auxotrophic reporters for histidine and adenine biosynthesis confer growth selection in the presence of AbA and on histidine- and adenine-deficient media, while the a-galactosidase reporter produces blue colonies in the presence of X-alpha-Gal.