Sakae Y, Kawasaki T, Okamoto Y. Distribution and Structure Analysis of Fibril-Forming Peptides Focusing on Concentration Dependency.
ACS OMEGA 2022;
7:10012-10021. [PMID:
35382341 PMCID:
PMC8975544 DOI:
10.1021/acsomega.1c04960]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
We focus on the concentration dependency of fibril-forming peptides, which have the potential of aggregation by themselves. In this study, we performed replica-exchange molecular dynamics simulations of Lys-Phe-Phe-Glu (KFFE) fragments, which are known to form fibrils in experiments under different concentration environments. The analysis by static structure factors suggested that the density fluctuation of the KFFE fragments becomes large as the concentration increases. It was also found that the number of β-structures and oligomers also increases under a high concentration environment. Hence, a high concentration environment of fibril-forming peptides is likely to cause protein aggregation.
Collapse