Reference: Dohmen RJ, et al. (1994) Heat-inducible degron: a method for constructing temperature-sensitive mutants. Science 263(5151):1273-6

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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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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
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Dohmen RJ, Wu P, Varshavsky A
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