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Modified Yeast-Two-Hybrid System to Identify Proteins Interacting with the Growth Factor Progranulin
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    This study details a three-step protocol for creating DNA-binding domain (DB)-bait yeast strains for yeast two-hybrid (Y2H) screening. The method facilitates protein-protein interaction studies using Gateway cloning technology.

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    Area of Science:

    • Molecular Biology
    • Biochemistry
    • Genetics

    Background:

    • Yeast two-hybrid (Y2H) screening is a vital technique for identifying protein-protein interactions.
    • Generating specific bait strains is a crucial prerequisite for successful Y2H screens.

    Purpose of the Study:

    • To provide a detailed protocol for generating DNA-binding domain (DB)-bait strains compatible with Gateway cloning for Y2H screens.
    • To streamline the process of creating custom Y2H bait constructs.

    Main Methods:

    • Generation of an Entry clone containing the protein of interest (e.g., open reading frame, ORF).
    • Transfer of the DNA fragment from the Entry clone into the Y2H Destination vector (pDEST32) via Gateway recombination.
    • Transformation of the resulting construct into the MaV103 yeast strain for Y2H screening.

    Main Results:

    • A complete protocol for generating DB-bait strains for Gateway-compatible Y2H screens is presented.
    • The protocol involves three key molecular cloning and transformation steps.
    • The entire process, excluding optional sequence confirmation, requires 24-37 days.

    Conclusions:

    • This standardized protocol facilitates the efficient construction of bait strains for large-scale Y2H interaction studies.
    • The described method enables researchers to readily generate custom DB-bait constructs for diverse protein interaction analyses.