Journal
PHYSICAL REVIEW E
Volume 80, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.80.041906
Keywords
aggregates (materials); biomechanics; diseases; elongation; molecular biophysics; proteins
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Funding
- Glasstone Trust (Oxford)
- Jesus College (Oxford)
- John Fell Oxford University Press Fund
- Medical Research Council [G0801917] Funding Source: researchfish
- MRC [G0801917] Funding Source: UKRI
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Protein amyloid fibrils are a form of linear protein aggregates that are implicated in many neurodegenerative diseases. Here, we study the dynamics of amyloid fibril elongation by performing Langevin dynamic simulations on a coarse-grained model of peptides. Our simulation results suggest that the elongation process is dominated by a series of local minimum due to frustration in monomer-fibril interactions. This rugged energy landscape picture indicates that the amount of recycling of monomers at the fibrils' ends before being fibrilized is substantially reduced in comparison to the conventional two-step elongation model. This picture, along with other predictions discussed, can be tested with current experimental techniques.
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