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Updated: Oct 22, 2025
05:48
Rapid Generation of Amyloid from Native Proteins In vitro
Published on: December 5, 2013
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Amyloid particles facilitate surface-catalyzed cross-seeding by acting as promiscuous nanoparticles
Nadejda Koloteva-Levine1, Liam D Aubrey1, Ricardo Marchante1
1Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ Canterbury, United Kingdom.
Summary
Amyloid seeds accelerate protein assembly through surface catalysis, not just templated elongation. This finding explains cross-seeding phenomena in protein misfolding diseases.
Area of Science:
- Biochemistry
- Molecular Biology
- Nanotechnology
Background:
- Amyloid seeds are protein nanoparticles that promote amyloid formation and disease transmission.
- Templated elongation explains some seeding but not cross-seeding by heterologous seeds.
Purpose of the Study:
- To investigate alternative mechanisms of amyloid seeding.
- To differentiate templated elongation from other seeding mechanisms.
- To elucidate the molecular basis of cross-seeding.
Main Methods:
- Quantitative characterization of cross-seeded assembly reactions.
- Utilized human Aβ42 peptide and yeast Sup35NM prion protein.
- Experimental differentiation of seeding mechanisms.
Main Results:
- Amyloid seeds can accelerate amyloid formation via surface catalysis.
- This surface catalysis does not propagate the seed's specific conformation.
- Demonstrated a mechanism distinct from templated elongation.
Conclusions:
- Amyloid seeds can act as catalysts through surface activity.
- Cross-seeding is a manifestation of nanoparticle surface properties.
- Provides a framework for distinguishing seeding mechanisms.
Keywords:
Saccharomyces cerevisiaeSup35 yeast prion proteinamyloid β peptideatomic force microscopyprotein aggregation and assemblyMore Related Videos
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