21BQ | pdb_000021bq

Cryo-EM structure of ex vivo Sup35 prion fibrils from yeast carrying "strong" [PSI+] variant

PDB DOI: https://doi.org/10.2210/pdb21BQ/pdb
EM Map EMD-67558: EMDB EMDataResource

Classification: PROTEIN FIBRIL
Organism(s): Saccharomyces cerevisiae
Mutation(s): No

Deposited: 2025-12-06 Released: 2026-07-22
Deposition Author(s): Chesnokov, Y.M., Burtseva, A.D., Dergalev, A.A., Baimukhametov, T.N., Kushnirov, V.V., Popov, V.O., Boyko, K.M.
Funding Organization(s): Russian Science Foundation

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.70 Å
Aggregation State: FILAMENT
Reconstruction Method: HELICAL

Starting Model: other
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wwPDB Validation 3D Report Full Report

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This is version 1.0 of the entry. See complete history.

Literature

CryoEM structure of ex vivo extracted Sup35 prion fibrils provides insights into [PSI+] prion phenotype determination and stability

Dergalev, A.A., Chesnokov, Y.M., Burtseva, A.D., Kushnirov, V.V., Boyko, K.M., Popov, V.O.

To be published.

Macromolecule Content

Total Structure Weight: 89.98 kDa
Atom Count: 2,580
Modeled Residue Count: 320
Deposited Residue Count: 800
Unique protein chains: 1

Macromolecules

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Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Amyloid of yeast prion Sup35	A, B, C, D, E	160	Saccharomyces cerevisiae	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.70 Å
Aggregation State: FILAMENT
Reconstruction Method: HELICAL

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.6
MODEL REFINEMENT	PHENIX	1.21.2_5419

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-07-22

Deposition Author(s):

Chesnokov, Y.M.

Baimukhametov, T.N.

Kushnirov, V.V.

Funding Organization	Location	Grant Number
Russian Science Foundation	Russian Federation	23-74-00062

Revision History (Full details and data files)

Version 1.0: 2026-07-22
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.