Published in:
01-10-2019 | Creutzfeldt-Jakob Disease | Commentary Letter
Alpha-synuclein: prion or prion-like?
Authors:
Rehana K. Leak, Matthew P. Frosch, Thomas G. Beach, Glenda M. Halliday
Published in:
Acta Neuropathologica
|
Issue 4/2019
Login to get access
Excerpt
Alpha-synuclein is a natively unfolded or intrinsically disordered protein, but it can also assume amphipathic alpha-helical shapes in the presence of negatively charged lipids. In Lewy body disorders, alpha-synuclein monomers aggregate into oligomers, protofibrils, and fibrils, forming part of the hallmark amyloid inclusions known as Lewy bodies and Lewy neurites. Proteins exist in biological settings in multiple conformations, often with varied biological functions, and the transitions between conformations include structures that seed the nucleated growth of aggregates [
10]. After the kinetic barrier to aggregation of natively monomeric proteins is (rarely) overcome, the global free-energy minimum favors the precipitation of hydrophobically packed protein masses [
15]. Once this low-energy state is acquired, it may not be energetically feasible to proteolyze and resolve the protein mass, and therefore, “the aggregate state always wins,” in the words of Guest et al. [
15]. …