Conformation Control of Amyloid Filaments by Repeated Thermal Perturbation

Sang Won Lee, Hyunsung Choi, Gyudo Lee, Yeseong Choi, Hyungbeen Lee, Geehyuk Kim, Hyeyoung Lee, Wonseok Lee, Jinsung Park, Dae Sung Yoon

Research output: Contribution to journalArticlepeer-review

Abstract

We report that repeated thermal perturbation by thermal cycling (TC) accelerates the formation rate of amyloid filaments at microliter volumes (10–200 μL) and produces a new conformation of zigzag-shaped filaments. The amyloid filaments have been synthesized under different TC conditions, such as temperature variations (ΔT = 0–86 °C) and the number of cycles (C# = 30–90). In particular, the filament formation was promoted by TC with ΔT ≥ 30 °C. This indicates that the change in binding energy of β-sheets and the breakage of disulfide bonds induced by TC with large ΔT contributed to the increased filament growth. This molecular interaction was investigated by molecular dynamics simulation. We also found that TC leads to the formation of amyloid filaments with peculiar conformation (zigzag-shaped filaments). Moreover, key structural parameters (tortuosity, segment length, and joint angle) of the amyloid filaments could be fine-tuned by selecting certain ΔT conditions. Taken together, we confirmed that the TC not only promotes the formation of amyloid filaments but also affects the conformational changes of the filaments.

Original languageEnglish
Pages (from-to)1549-1554
Number of pages6
JournalACS Macro Letters
Volume10
Issue number12
DOIs
Publication statusPublished - 2021 Dec 21

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Conformation Control of Amyloid Filaments by Repeated Thermal Perturbation'. Together they form a unique fingerprint.

Cite this