ISDA

Deposition Date 2022-06-28

Release Date 2022-07-27

Last Version Date 2024-07-03

Entry Detail

PDB ID:

7YAT

Keywords:

PROTEIN FIBRIL

Title:

CryoEM tetra protofilament structure of the hamster prion 108-144 fibril

Biological Source:

Source Organism:

Mesocricetus auratus (Taxon ID: 10036)

Method Details:

Experimental Method:

ELECTRON MICROSCOPY

Resolution:

2.20 Å

Aggregation State:

FILAMENT

Reconstruction Method:

HELICAL

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Major prion protein
Gene (Uniprot):PRNP
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.

Chen, E.H, Kao, H.W, Lee, C.H, Huang, J.Y.C, Wu, K.P, Chen, R.P.Show

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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