Journal Article

FZJ-2023-00561

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interaction of Therapeutic d -Peptides with Aβ42 Monomers, Thermodynamics, and Binding Analysis

Leguizamon Herrera, V. L. ; Buell, A. K. ; Willbold, D. (Corresponding author)FZJ* ; Barz, B.

2022
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acschemneuro.2c00102

Abstract: The aggregation of the amyloid-β (Aβ) peptide is a major hallmark of Alzheimer’s disease. This peptide can aggregate into oligomers, proto-fibrils, and mature fibrils, which eventually assemble into amyloid plaques. The peptide monomers are the smallest assembly units and play an important role in most of the individual processes involved in amyloid fibril formation, such as primary and secondary nucleation and elongation. Several d-peptides have been confirmed as promising candidates to inhibit the aggregation of Aβ into toxic oligomers and fibrils by specifically interacting with monomeric species. In this work, we elucidate the structural interaction and thermodynamics of binding between three d-peptides (D3, ANK6, and RD2) and Aβ42 monomers by means of enhanced molecular dynamics simulations. Our study derives thermodynamic energies in good agreement with experimental values and suggests that there is an enhanced binding for D3 and ANK6, which leads to more stable complexes than for RD2. The binding of D3 to Aβ42 is shown to be weakly exothermic and mainly entropically driven, whereas the complex formation between the ANK6 and RD2 with the Aβ42 free monomer is weakly endothermic. In addition, the changes in the solvent-accessible surface area and the radius of gyration support that the binding between Aβ42 and d-peptides is mainly driven by electrostatic and hydrophobic interactions and leads to more compact conformations.

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Contributing Institute(s):

1. Strukturbiochemie (IBI-7)

Research Program(s):

1. 5244 - Information Processing in Neuronal Networks (POF4-524) (POF4-524)

Appears in the scientific report 2022

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Database coverage:
; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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