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A growing body of evidence indicates that phospho\u2010\/sphingolipids and cholesterol alter the aggregation properties of wild\u2010type (WT) \u03b1\u2010syn. However, the effects of these lipids on the rate of \u03b1\u2010syn mutants remain unclear. In the current study, we determined the aggregation rates of A30P, E46K, A53T, H50Q and WT \u03b1\u2010syn in the presence of large unilamellar vesicles composed of phosphatidylcholine (PC), sphingomyelin (SM) and cholesterol (Cho)\u2014the key lipids of neuronal membranes. We also utilised a set of biophysical methods to reveal the extent to which lipids alter the morphology and secondary structure of amyloid fibrils. We found that familial mutations uniquely altered \u03b1\u2010syn interactions with lipid bilayers, which resulted in the altered rate of protein aggregation in the presence of lipid bilayers. Furthermore, A30P mutation fully disabled \u03b1\u2010syn interaction with LUVs, while E46K, A53T and H50Q mutations altered cytotoxicity of \u03b1\u2010syn fibrils formed in the presence of lipid bilayers. These results suggest that changes in plasma membrane lipid profiles may have a strong effect on the onset and progression of PD in individuals with familial mutations.<\/jats:p>","DOI":"10.1111\/febs.70363","type":"journal-article","created":{"date-parts":[[2025,12,16]],"date-time":"2025-12-16T03:50:32Z","timestamp":1765857032000},"page":"2478-2499","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Familial mutations modulate \u03b1\u2010synuclein interactions with key neuronal membrane lipids"],"prefix":"10.1111","volume":"293","author":[{"given":"Abid","family":"Ali","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Biophysics Texas A&amp;M University  College Station TX USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mikhail","family":"Matveyenka","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Biophysics Texas A&amp;M University  College 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