Fast protein-depletion system utilizing tetracycline repressible promoter and N-end rule in yeast

Mol Biol Cell. 2015 Feb 15;26(4):762-8. doi: 10.1091/mbc.E14-07-1186. Epub 2014 Dec 24.


A protein depletion by promoter shutoff or protein destabilization is an important tool in investigation of functions of essential genes. Various approaches using different repressible promoters, inducible degrons, or their combinations were developed. While successful, the current techniques have a drawback in that they require fusion of a large degradation tag to the target protein and/or a change in growth conditions to repress the promoter. We describe efficient protein depletion using the combination of a metabolically inert tetracycline repressible promoter with tetracycline aptamer and constitutive target protein destabilization by means of ubiquitin fusion. The target protein does not require a tag, and its elimination is several fold faster compared with standard promoter shutoff systems. A depletion time of <40 min was sufficient to achieve a robust phenotype.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Gene Expression Regulation
  • Promoter Regions, Genetic*
  • Protein Synthesis Inhibitors / pharmacology*
  • Proteolysis / drug effects
  • Reverse Genetics / methods*
  • Saccharomyces cerevisiae / drug effects
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae Proteins / metabolism*
  • Tetracycline / pharmacology*
  • Ubiquitin / metabolism
  • Ubiquitin / physiology


  • Protein Synthesis Inhibitors
  • Saccharomyces cerevisiae Proteins
  • Ubiquitin
  • Tetracycline