Cited by 12Protein Structure and DynamicsAlzheimer's disease research and treatmentsProtein purification and stability

Can Peptide Folding Simulations Provide Predictive Information for Aggregation Propensity?

Lin, Edmund I., Shell, M. Scott·2010·The Journal of Physical Chemistry B

Abstract

Nonnative peptide aggregation underlies many diseases and is a major problem in the development of peptide-based therapeutics. Efforts in the past decade have revealed remarkable correlations between aggregation rates or propensities and very simple sequence metrics like hydrophobicity and charge. Here, we investigate the extent to which a molecular picture of peptide folding bears out similar relationships. Using replica exchange molecular dynamics folding simulations, we compute equilibrium conformational ensembles of 142 hexa- and decapeptide systems, of which about half readily form amyloid fibrils and half do not. The simulations are used to compute a variety of ensemble-based properties, and we investigate the extent to which these metrics provide molecular clues about fibril formation. To assess whether multiple metrics together are useful in understanding aggregation, we also develop a number of logistic regression models, some of which predict fibril formers with 70-80% accuracy and identify aggregation-prone regions in larger proteins. Importantly, these models quantify the importance of different molecular properties in aggregation driving forces; notably, they suggest that hydrophobic interactions play a dominant role.

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Crossref · 10.1021/jp104114n

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  • The present work used the AMBER ff96 force field in combination with the OBC2 implicit solvent model, which has been successfully applied to study the association of proteins and peptides by others.

    “The present work used the AMBER ff96 force field in combination with the OBC2 implicit solvent model, which has been successfully applied to study the association of proteins and peptides by others.123−125”

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Authors
Lin, E. I., & Shell, M. S.
Affiliations
University of California, Santa Barbara (US)
Corresponding author
Shell, M. Scott
Venue
The Journal of Physical Chemistry B
Published
2010-08-23
Volume
114
Issue
36
Pages
11899-11908
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W2003101786
Cited by
12
References
85
Citations by year
2025: 1 · 2021: 1 · 2017: 1 · 2016: 2 · 2014: 2 · 2013: 1 · 2012: 1
FWCI
0.65
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Physical Chemistry B (publishedVersion)
  • PubMed (publishedVersion)
Funders
Division of Chemical, Bioengineering, Environmental, and Transport Systems
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein purification and stability
Keywords
peptide folding, peptide aggregation, amyloid fibril formation, aggregation propensity, hydrophobic interactions, conformational ensembles, hydrophobicity, peptide therapeutics, aggregation-prone regions, logistic regression prediction
MeSH terms
Peptides, Protein Conformation, Protein Folding, Databases, Protein, Static Electricity, Molecular Dynamics Simulation

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