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. 2023 Aug 26;24(17):13270. doi: 10.3390/ijms241713270

Table 1.

Summary of PD-related point mutations of α-syn and their effects on its binding capacity to membranes.

Mutation Effects on Lipid Membranes Ref.
V15A
  • decreased affinity to phospholipids accompanied by an increased aggregation and seeding activity

[132]
A18T
  • less toxic than wildtype α-syn

  • altered triglycerides reduce α-syn toxicity

[133]
A29S
  • less toxic than wildtype α-syn

  • altered triglycerides decrease α-syn toxicity

  • enhanced acetylation or SUMOylation are protective against α-syn toxicity

[133]
A30P
  • reduced binding to membranes

  • formation of metal ion-induced pathologic oligomers was increased

  • fibril formation is slower in A30P mutants compared to wildtype

  • interaction of α-syn with lipid rafts is hindered

[85,134,135,136]
E46K
  • increased lipid interactions and disrupted membrane selectivity

  • increased N-to-C interactions and coil compactness in the structure of lipid-unbound α-syn

  • conformation of α-syn is altered upon interaction with a curved lipid bilayer

[137,138]
H50Q
  • enhances α-syn aggregation and toxicity without affecting the binding capacity to lipid membranes

[139]
G51D
  • decreased binding to lipid membrane

  • fibril formation was accelerated

[136]
A53E
  • α-syn exhibits a low lipid binding capacity compared to wildtype

[140]
A53T
  • does not change the binding capacity of α-syn to membranes

  • formation of metal ion-induced pathologic oligomers and fibril formation are increased

  • α-syn monomers cause membrane thinning and facilitate the interaction with artificial lipid rafts

  • iron-mediated oligomers do not impair the membrane, but facilitate the interaction with artificial lipid rafts

  • no effect on the interaction of α-syn with lipid rafts

[85,136,141,142]
A53V
  • low binding affinity to membranes compared to wildtype

  • less toxic than wildtype α-syn

  • altered triglycerides reduce α-syn toxicity

  • enhanced acetylation or SUMOylation are protective against α-syn toxicity

[133,140]