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Engineering Selective TIMPs Using a Counter-Selective Screening Strategy.

Hannaneh Ahmadighadykolaei1, Evette S Radisky2, Maryam Raeeszadeh-Sarmazdeh3

  • 1Department of Chemical and Materials Engineering, University of Nevada, Reno, NV, USA.

Methods in Molecular Biology (Clifton, N.J.)
|December 1, 2023
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Summary

This study presents a yeast surface display method for engineering selective protein inhibitors. The approach enhances specificity towards specific targets, like matrix metalloproteinases (MMPs), using a tissue inhibitor of metalloproteinase (TIMP) library.

Keywords:
Directed evolutionEnzyme inhibitorsExtracellular matrixFluorescence-activated cell sortingMatrix metalloproteinaseRational design of proteinsTissue inhibitor of metalloproteinasesYeast surface display

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Protein Engineering

Background:

  • Yeast surface display is a powerful technique for screening protein libraries to find high-affinity binders.
  • Identifying binders with enhanced specificity for one target among closely related partners remains a challenge.
  • Matrix metalloproteinases (MMPs) are a class of enzymes with diverse functions, and selective inhibition is crucial for therapeutic applications.

Purpose of the Study:

  • To adapt the yeast surface display platform for identifying protein binders with enhanced specificity.
  • To engineer selective inhibitors targeting specific matrix metalloproteinases (MMPs).
  • To develop a counter-selective screening strategy for enhancing target specificity.

Main Methods:

  • Utilized yeast surface display of a tissue inhibitor of metalloproteinase (TIMP) diversity library.
  • Employed a counter-selective screening strategy to enrich for binders with specificity towards a chosen MMP.
  • Developed and validated methods for engineering selective protein inhibitors.

Main Results:

  • Successfully adapted yeast surface display for screening specificity against closely related targets.
  • Engineered selective matrix metalloproteinase (MMP) inhibitors using the developed protocol.
  • Demonstrated the efficacy of the counter-selective screening strategy in enhancing inhibitor specificity.

Conclusions:

  • The described yeast surface display adaptation enables the engineering of highly specific protein inhibitors.
  • This method is effective for developing selective inhibitors against targets like matrix metalloproteinases (MMPs).
  • The protocol can be broadly applied for developing selective protein binders or inhibitors for various targets.