Ganglioside lipids accelerate α-synuclein amyloid formation

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The deposition of α-synuclein fibrils is one hallmark of Parkinson's disease. Here, we investigate how ganglioside lipids, present in high amounts in neurons and exosomes, influence the aggregation kinetics of α-synuclein. Gangliosides, as well as, other anionic lipid species with small or large headgroups were found to induce conformational changes of α-synuclein monomers and catalyse their aggregation at mildly acidic conditions. Although the extent of this catalytic effect was slightly higher for gangliosides, the results imply that charge interactions are more important than headgroup chemistry in triggering aggregation. In support of this idea, uncharged lipids with large headgroups were not found to induce any conformational change and only weakly catalyse aggregation. Intriguingly, aggregation was also triggered by free ganglioside headgroups, while these caused no conformational change of α-synuclein monomers. Our data reveal that partially folded α-synuclein helical intermediates are not required species in triggering of α-synuclein aggregation.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Martin-Luther-Universität Halle-Wittenberg
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Biofysik
Originalspråkengelska
Sidor (från-till)1062-1072
Antal sidor11
TidskriftBiochimica et Biophysica Acta - Proteins and Proteomics
Volym1866
Utgivningsnummer10
StatusPublished - 2018 okt 1
PublikationskategoriForskning
Peer review utfördJa