Relationship between structural composition and material properties of polymorphic hIAPP fibrils

Myeongsang Lee, Hyun Joon Chang, Donghoi Kim, Yongwoo Lee, Heesu Suh, Namjo Ahn, Gwonchan Yoon, Sung Soo Na

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Amyloid proteins are misfolded, denatured proteins that are responsible for causing several degenerative and neuro-degenerative diseases. Determining the mechanical stability of these amyloids is crucial for understanding the disease mechanisms, which will guide us in treatment. Furthermore, many research groups recognized amyloid proteins as functional biological materials that can be used in nanosensors, bacterial biofilms, coatings, etc. Many in vitro studies have been carried out to determine the characteristics of amyloid proteins via force spectroscopy methods, atomic force microscopy, and optical tweezers. However, computational methods (e.g. molecular dynamics and elastic network model) not only reveal the mechanical properties of the amyloid proteins, but also provide more in-depth information about the amyloids by presenting a visualization of their conformational changes. In this study, we evaluated the various material properties and behaviors of four different polymorphic structures of human islet amyloid polypeptide (hIAPP) by using steered molecular dynamics (SMD) simulations under tensile conditions. From our results, we examined how these mechanical properties may differ with respect to the structural formation of amyloid proteins.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalBiophysical Chemistry
Volume199
DOIs
Publication statusPublished - 2015

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Keywords

  • hIAPP fibrils
  • Polymorphic structures
  • Steered molecular dynamics

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Organic Chemistry

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