title: Most, but not all, yeast strains in the deletion library contain the [PIN(+)] prion.
abstract: The yeast deletion library is a collection of over 5100 single gene deletions that has been widely used by the yeast community. The presence of a non-Mendelian element, such as a prion, within this library could affect the outcome of many large-scale genomic studies. We previously showed that the deletion library parent strain contained the [PIN(+)] prion. [PIN(+)] is the misfolded infectious prion form of the Rnq1 protein that displays distinct fluorescent foci in the presence of RNQ1-GFP and exists in different physical conformations, called variants. Here, we show that over 97% of the library deletion strains are [PIN(+)]. Of the 141 remaining strains that have completely (58) or partially (83) lost [PIN(+)], 139 deletions were able to efficiently maintain three different [PIN(+)] variants despite extensive growth and storage at 4 degrees C. One strain, cue2Delta, displayed an alteration in the RNQ1-GFP fluorescent shape, but the Rnq1p prion aggregate shows no biochemical differences from the wild-type. Only strains containing a deletion of either HSP104 or RNQ1 are unable to maintain [PIN(+)], indicating that 5153 non-essential genes are not required for [PIN(+)] propagation.
authors.affiliation: Department of Biological Sciences, Laboratory for Molecular Biology, University of Illinois at Chicago, 900 South Ashland Avenue, Chicago, IL 60607, USA.
authors.forename: Anita L
authors.initials: AL
authors.lastname: Manogaran
authors.forename: Viviana M
authors.initials: VM
authors.lastname: Fajardo
authors.forename: Robert J D
authors.initials: RJ
authors.lastname: Reid
authors.forename: Rodney
authors.initials: R
authors.lastname: Rothstein
authors.forename: Susan W
authors.initials: SW
authors.lastname: Liebman
mesh_terms: D017353:Gene Deletion; D015698:Genomic Library; D006360:Heat-Shock Proteins / Q000235:genetics; D011328:Prions / Q000235:genetics*; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics*
chemical_list: D006360:Heat-Shock Proteins; D011328:Prions; C404807:RNQ1 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; C070972:HsP104 protein, S cerevisiae