A genome-scale yeast library with inducible expression of individual genes.

TitleA genome-scale yeast library with inducible expression of individual genes.
Publication TypeJournal Article
Year of Publication2021
AuthorsArita, Y, Kim, G, Li, Z, Friesen, H, Turco, G, Wang, RY, Climie, D, Usaj, M, Hotz, M, Stoops, EH, Baryshnikova, A, Boone, C, Botstein, D, Andrews, BJ, R McIsaac, S
JournalMol Syst Biol
Date Published2021 06
KeywordsGene Library, Genes, Essential, Plasmids, Promoter Regions, Genetic, Saccharomyces cerevisiae

<p>The ability to switch a gene from off to on and monitor dynamic changes provides a powerful approach for probing gene function and elucidating causal regulatory relationships. Here, we developed and characterized YETI (Yeast Estradiol strains with Titratable Induction), a collection in which > 5,600 yeast genes are engineered for transcriptional inducibility with single-gene precision at their native loci and without plasmids. Each strain contains SGA screening markers and a unique barcode, enabling high-throughput genetics. We characterized YETI using growth phenotyping and BAR-seq screens, and we used a YETI allele to identify the regulon of Rof1, showing that it acts to repress transcription. We observed that strains with inducible essential genes that have low native expression can often grow without inducer. Analysis of data from eukaryotic and prokaryotic systems shows that native expression is a variable that can bias promoter-perturbing screens, including CRISPRi. We engineered a second expression system, Z EB42, that gives lower expression than Z EV, a feature enabling conditional activation and repression of lowly expressed essential genes that grow without inducer in the YETI library.</p>

Alternate JournalMol Syst Biol
PubMed ID34096681
PubMed Central IDPMC8182650
Grant ListR01 GM046406 / GM / NIGMS NIH HHS / United States
FDN-143264 / / CIHR / Canada
FDN-143265 / / CIHR / Canada