Heat-inducible degron: a method for constructing temperature-sensitive mutants - PubMed (original) (raw)
. 1994 Mar 4;263(5151):1273-6.
doi: 10.1126/science.8122109.
Affiliations
- PMID: 8122109
- DOI: 10.1126/science.8122109
Heat-inducible degron: a method for constructing temperature-sensitive mutants
R J Dohmen et al. Science. 1994.
Abstract
A temperature-sensitive (ts) mutant retains the function of a gene at a low (permissive) temperature but not at a high (nonpermissive) temperature. Arg-DHFR, a dihydrofolate reductase bearing an amino-terminal (N-terminal) arginine, is long-lived in the yeast Saccharomyces cerevisiae, even though arginine is a destabilizing residue in the N-end rule of protein degradation. A ts derivative of Arg-DHFR was identified that is long-lived at 23 degrees C but rapidly degraded by the N-end rule pathway at 37 degrees C. Fusions of ts Arg-DHFR to either Ura3 or Cdc28 of S. cerevisiae confer ts phenotypes specific for these gene products. Thus, Arg-DHFRts is a heat-inducible degradation signal that can be used to produce ts mutants without a search for ts mutations.
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