Celina M. Schulz, Emil D. Agerschou, Luis Gardon, Miriam Alexander, Matthias Stoldt, Henrike Heise, Gültekin Tamgüney, Wolfgang Hoyer
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引用次数: 0
Abstract
Inhibitors of amyloid fibril formation can act in diverse ways and aid in elucidating the mechanisms of protein aggregation. The engineered binding protein β-wrapin AS69 binds monomers of Parkinson-disease-associated α-synuclein (αS), yet achieves inhibition at substoichiometric concentration. The substoichiometric activity was not attributed to the binding protein per se, but to its 1:1 complex with αS, in which AS69 sequesters αS residues 30–60 into a globular protein fold, whereas other αS parts remain intrinsically disordered regions (IDRs). Here, we investigate AS69-αS fusion constructs that form the AS69:αS complex by intramolecular folding and expose different IDRs. We find that not only the globular part of the complex but also αS IDRs are critical for substoichiometric inhibition, which is achieved by interference with primary and secondary fibril nucleation. The effects in vitro are reproduced in cellular seeding assays, indicating that secondary nucleation drives seeding in aggregate biosensing.
期刊介绍:
Cell Reports Physical Science, a premium open-access journal from Cell Press, features high-quality, cutting-edge research spanning the physical sciences. It serves as an open forum fostering collaboration among physical scientists while championing open science principles. Published works must signify significant advancements in fundamental insight or technological applications within fields such as chemistry, physics, materials science, energy science, engineering, and related interdisciplinary studies. In addition to longer articles, the journal considers impactful short-form reports and short reviews covering recent literature in emerging fields. Continually adapting to the evolving open science landscape, the journal reviews its policies to align with community consensus and best practices.