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Bacterial functional amyloids: Order from disorder.

Neha Jain1, Matthew R Chapman2

  • 1Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, Gujarat, India.

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|June 14, 2019
PubMed
Summary
This summary is machine-generated.

Intrinsically disordered proteins enable functional amyloid curli assembly in bacteria. Chaperone proteins and compartmentalization control this process, preventing harmful aggregation and ensuring proper biofilm formation.

Keywords:
BiofilmsCurliFunctional amyloidsIntrinsically disordered proteinsPhase transition

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Microbiology

Background:

  • Intrinsically disordered proteins (IDPs) exhibit plasticity, enabling diverse biological functions.
  • Amyloids, protein aggregates, are linked to diseases but also have functional roles.
  • Curli are functional amyloid fibers crucial for bacterial biofilm formation.

Purpose of the Study:

  • To review the biogenesis of curli amyloids.
  • To elucidate the role of intrinsically disordered proteins in curli assembly.
  • To understand the regulation of curli formation in bacteria.

Main Methods:

  • Review of existing literature on protein disorder, amyloid formation, and curli biogenesis.
  • Analysis of the structural and functional properties of curli-specific genes (Csg) proteins.
  • Examination of regulatory mechanisms controlling amyloid assembly in bacteria.

Main Results:

  • Several curli assembly proteins (Csg) are intrinsically disordered.
  • IDPs' flexibility allows for conformational transitions essential for curli formation.
  • Controlled assembly is achieved through compartmentalization and chaperone proteins.

Conclusions:

  • Intrinsically disordered proteins are key components in the functional assembly of bacterial curli amyloids.
  • Regulatory mechanisms ensure precise control over curli biogenesis, preventing aberrant aggregation.
  • Understanding IDP roles in curli formation offers insights into bacterial adaptation and biofilm dynamics.