High-copy rescue genetic screening is a powerful strategy for the identification of suppression genetic interactions in the model eukaryotic organism Saccharomyces cerevisiae (budding yeast). The strain carrying the mutant allele of interest is transformed with a genomic library cloned in a high-copy plasmid. Each clone carries a genomic fragment insertion of around 10 kb, typically containing one to three complete genes under their own promoters. The high-copy vector favors the accumulation of high levels of the corresponding protein, aimed at suppressing the mutant phenotype. Typically, high-copy genetic screens select for viable clones under conditions restrictive or lethal for the query mutant strain. Here, we describe in detail the procedure to generate a high-copy genomic library and a protocol for rescue genetic screening and identification of the suppressor clones.
CITATION STYLE
Zeng, F., & Quintana, D. G. (2021). High-copy yeast library construction and high-copy rescue genetic screen in saccharomyces cerevisiae. In Methods in Molecular Biology (Vol. 2196, pp. 77–83). Humana Press Inc. https://doi.org/10.1007/978-1-0716-0868-5_7
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