CheckMate Mammalian Two-Hybrid System - MyBio Ireland - Promega

CheckMate Mammalian Two-Hybrid System


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Two-hybrid systems are extremely powerful methods for detecting protein:protein interactions in vivo. The basis of two-hybrid systems is the modular domains found in some transcription factors: a DNA-binding domain, which binds to a specific DNA sequence, and a transcriptional activation domain, which interacts with the basal transcriptional machinery. A transcriptional activation domain in association with a DNA-binding domain will promote the assembly of RNA polymerase II complexes at the TATA box and increase transcription. In the CheckMate Mammalian Two-Hybrid System the DNA-binding domain and the transcriptional activation domain, produced by separate plasmids, are closely associated when one protein (X) fused to a DNA-binding domain interacts with a second protein (Y) fused to a transcriptional activation domain. In this system, interaction between proteins X and Y results in transcription of a reporter gene.

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