7C1D

Cryo-EM structure of the hE46K cross-seeded hWT alpha-synuclein fibril

Summary for 7C1D

• Entry DOI: 10.2210/pdb7c1d/pdb
• EMDB information: 30269
• Descriptor: Alpha-synuclein (1 entity in total)
• Functional Keywords: amyloid fibril, protein fibril
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 6
• Total formula weight: 86856.65

Authors

Sun, Y.P.,Zhao, K.,Liu, C. (deposition date: 2020-05-03, release date: 2021-05-05, Last modification date: 2024-05-29)

Primary citation

Long, H.,Zheng, W.,Liu, Y.,Sun, Y.,Zhao, K.,Liu, Z.,Xia, W.,Lv, S.,Liu, Z.,Li, D.,He, K.W.,Liu, C.
Wild-type alpha-synuclein inherits the structure and exacerbated neuropathology of E46K mutant fibril strain by cross-seeding.
Proc.Natl.Acad.Sci.USA, 118:-, 2021

PubMed Abstract: Heterozygous point mutations of α-synuclein (α-syn) have been linked to the early onset and rapid progression of familial Parkinson's diseases (fPD). However, the interplay between hereditary mutant and wild-type (WT) α-syn and its role in the exacerbated pathology of α-syn in fPD progression are poorly understood. Here, we find that WT mice inoculated with the human E46K mutant α-syn fibril (hE46K) strain develop early-onset motor deficit and morphologically different α-syn aggregation compared with those inoculated with the human WT fibril (hWT) strain. By using cryo-electron microscopy, we reveal at the near-atomic level that the hE46K strain induces both human and mouse WT α-syn monomers to form the fibril structure of the hE46K strain. Moreover, the induced hWT strain inherits most of the pathological traits of the hE46K strain as well. Our work suggests that the structural and pathological features of mutant strains could be propagated by the WT α-syn in such a way that the mutant pathology would be amplified in fPD.

PubMed: 33972418
DOI: 10.1073/pnas.2012435118

Experimental method

ELECTRON MICROSCOPY (3.8 Å)