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A New Toolkit for Evaluating Gene Functions using Conditional Cas9 Stabilization
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Published on: September 2, 2021

Recent progress with FKBP-derived destabilizing domains.

Bernard W Chu1, Laura A Banaszynski, Ling-chun Chen

  • 1Department of Chemical and Systems Biology, Stanford University, 318 Campus Drive, Clark Center W350A, Stanford, CA 94305-5441, USA.

Bioorganic & Medicinal Chemistry Letters
|September 26, 2008
PubMed
Summary
This summary is machine-generated.

FKBP-derived destabilizing domains, like L106P, control protein stability in a small molecule-dependent manner. Engineered destabilizing domains do not override natural protein degradation signals.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Engineering

Background:

  • FKBP-derived destabilizing domains are emerging tools for controlling protein stability.
  • These domains enable small molecule-dependent regulation of protein half-life.

Purpose of the Study:

  • To investigate the efficacy of the L106P destabilizing domain in controlling yellow fluorescent protein stability.
  • To determine if multiple copies of L106P enhance instability and if L106P overrides endogenous degradation signals.

Main Methods:

  • Fusion of the L106P domain to various positions of yellow fluorescent protein (N-terminus, C-terminus, internal).
  • Assessment of protein instability conferred by single and multiple copies of L106P.
  • Comparison of L106P-induced instability with endogenous degrons.

Main Results:

  • The L106P domain confers instability to yellow fluorescent protein regardless of its fusion location.
  • Multiple copies of the L106P domain did not result in increased instability.
  • Engineered destabilizing domains were not found to be dominant over endogenous protein degradation signals (degrons).

Conclusions:

  • The L106P domain effectively destabilizes fused proteins in a position-independent manner.
  • The destabilizing effect of L106P is not dose-dependent.
  • Engineered destabilizing domains can be used to modulate protein stability without interfering with endogenous regulatory pathways.