9JI8 | pdb_00009ji8

Cryo-EM structure of alpha-synuclein-H21 fibril

• PDB DOI: https://doi.org/10.2210/pdb9JI8/pdb
• EM Map EMD-61500: EMDB EMDataResource

• Classification: PROTEIN FIBRIL
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-09-11 Released: 2025-09-17 
• Deposition Author(s): Zeng, S.Y., Zhang, S.N., Li, D.N., Liu, C.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.85 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Cryo-EM structure of alpha-synuclein-H21 fibril

Zeng, S.Y., Zhang, S.N., Li, D.N., Liu, C.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 12-mer - A6B6 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 12-mer - A6B1C1D1E1F1G1 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 43.36 kDa 
• Atom Count: 3,030 
• Modeled Residue Count: 438 
• Deposited Residue Count: 438 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GLY-VAL-VAL-ALA-ALA-ALA-GLU-LYS-THR-LYS	A [auth D], C [auth H], E, G [auth I], I [auth J], K [auth N]	10	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-synuclein	B [auth F], D [auth K], F [auth G], H [auth L], J [auth M], L [auth O]	63	Homo sapiens	Mutation(s): 0  Gene Names: SNCA, NACP, PARK1
UniProt & NIH Common Fund Data Resources
Find proteins for P37840 (Homo sapiens) Explore P37840  Go to UniProtKB:  P37840
PHAROS:  P37840 GTEx:  ENSG00000145335

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.85 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-09-17 
Deposition Author(s): Zeng, S.Y., Zhang, S.N., Li, D.N., Liu, C.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2025-09-17
  Type: Initial release