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Interaction of microbial functional amyloids with solid surfaces.

Esra Yuca1, Ebru Şahin Kehribar2, Urartu Özgür Şafak Şeker2

  • 1Molecular Biology and Genetics Department, Yildiz Technical University, 34210 Istanbul, Turkey.

Colloids and Surfaces. B, Biointerfaces
|January 1, 2021
PubMed
Summary
This summary is machine-generated.

Functional amyloids like curli proteins offer advanced biomaterial potential. Researchers studied curli proteins CsgA and CsgB binding to surfaces, finding CsgB crucial for hydroxyapatite/silica adhesion and CsgA for gold adhesion.

Keywords:
AmyloidsBacterial biofilm proteinsCsgACsgBCurli

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Area of Science:

  • Biomaterials Science
  • Protein Engineering
  • Surface Chemistry

Background:

  • Self-assembling protein subunits are promising for advanced biomaterials.
  • Functional amyloids, like bacterial curli proteins, exhibit unique properties including stability and functionalization ease.
  • Curli proteins (CsgA and CsgB) can be engineered into intelligent biomaterials.

Purpose of the Study:

  • To engineer controllable curli-based biomaterials for biomedical applications.
  • To elucidate the distinct roles of curli proteins CsgA and CsgB in surface binding.
  • To understand curli protein adhesion kinetics on various biomedical surfaces.

Main Methods:

  • Characterization of binding kinetics for CsgA, CsgB, and their equimolar mixture.
  • Assessment of protein-surface interactions on gold, hydroxyapatite, and silica substrates.
  • Analysis of monomeric protein contributions to the adhesive properties of curli assemblies.

Main Results:

  • CsgA, CsgB, and their mixture exhibit differential binding strengths across surfaces.
  • CsgB is the primary determinant of CsgA-CsgB mixture adhesion on hydroxyapatite and silica.
  • CsgA governs the binding behavior of the CsgA-CsgB mixture on gold surfaces.

Conclusions:

  • The study reveals distinct surface-binding behaviors of CsgA and CsgB curli proteins.
  • Understanding these interactions allows for precise control over curli protein adhesion to specific surfaces.
  • This knowledge facilitates the development of tailored curli-based biomaterials for targeted biomedical applications.