7YAT image
Entry Detail
PDB ID:
7YAT
EMDB ID:
EMD-33719
Keywords:
PROTEIN FIBRIL
Title:
CryoEM tetra protofilament structure of the hamster prion 108-144 fibril
Biological Source:
Source Organism:
Mesocricetus auratus
PDB Version:
Deposition Date:
2022-06-28
Release Date:
2022-07-27
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
2.20 Å
Aggregation State:
FILAMENT
Reconstruction Method:
HELICAL
7YAT validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Major prion protein
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W (auth: X), X (auth: Y)
Chain Length:25
Number of Molecules:24
Biological Source:Mesocricetus auratus
UniProt ID:P04273
Primary Citation
2.2 angstrom Cryo-EM Tetra-Protofilament Structure of the Hamster Prion 108-144 Fibril Reveals an Ordered Water Channel in the Center.
J.Am.Chem.Soc. 144 13888 13894 (2022)
PMID: 35857020 DOI: 10.1021/jacs.2c05479

Abstact

Fibrils of the hamster prion peptide (sHaPrP, sequence 108-144) were prepared in an acidic solution, and their structure was solved by cryogenic electron microscopy with a resolution of 2.23 Å based on the gold-standard Fourier shell correlation (FSC) curve. The fibril has a novel architecture that has never been found in other amyloid fibrils. Each fibril is assembled by four protofilaments (PFs) and has an ordered water channel in the center. Each protofilament contains three β-strands (125-130, 133-135, and 138-141) arranged in an "R"-shaped construct. The structural data indicate that these three β-strand segments are the most amyloidogenic region of the prion peptide/protein and might be the site of nucleation during fibrillization under conditions without denaturants.

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Primary Citation of related structures
7YAT