9HYW | pdb_00009hyw

Cryo-EM structure of ATTRv-F64S amyloid fibril from patient skin tissue.

• PDB DOI: https://doi.org/10.2210/pdb9HYW/pdb
• EM Map EMD-52519: EMDB EMDataResource

• Classification: PROTEIN FIBRIL
• Organism(s): Homo sapiens
• Mutation(s): Yes 


• Deposited: 2025-01-10 Released: 2026-01-21 
• Deposition Author(s): Yu, J., Zhang, X., Boland, A.
• Funding Organization(s): Swiss National Science Foundation

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.80 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental

Literature

Structure of ATTRv-F64S fibrils isolated from skin tissue of a living patient.

Yu, J., Zhang, X., Pinton, S., Vacchi, E., Cavalli, A., Pecoraro, M., Melli, G., Boland, A.

(2025) Nat Commun 17: 781-781

• PubMed: 41402329 
• DOI: https://doi.org/10.1038/s41467-025-67457-2
• Primary Citation Related Structures: 
  9HYW


• PubMed Abstract: 
  

  Amyloid transthyretin-derived (ATTR) amyloidosis is a degenerative, systemic disease characterized by transthyretin fibril deposition in organs like the heart, kidneys, liver, and skin. In this study, we report the cryo-EM structure of transthyretin fibrils isolated from skin tissue of a living patient carrying a rare genetic mutation (ATTRv F64S). The structure adopts a highly conserved fold previously observed in other ATTR fibrils from various tissues or different genetic variants. Mass spectrometry was used to evaluate fibril content and to identify common post-translational modifications. The structural consistency between ATTR filaments from different tissues or patients validates non-invasive skin biopsy as a diagnostic tool.

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Organizational Affiliation: 
• Department of Molecular and Cellular Biology, University of Geneva, Geneva, Switzerland.
Institute for Translational Research (IRT), Faculty of Biomedical Sciences, Università della Svizzera italiana (USI) and Ente Ospedaliero Cantonale (EOC), Bellinzona, Switzerland.
Institute for Research in Biomedicine (IRB), Università della Svizzera Italiana (USI), Bellinzona, Switzerland.
Institute for Translational Research (IRT), Faculty of Biomedical Sciences, Università della Svizzera italiana (USI) and Ente Ospedaliero Cantonale (EOC), Bellinzona, Switzerland. [e-mail].
Department of Molecular and Cellular Biology, University of Geneva, Geneva, Switzerland. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 9-mer - A9 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 142.6 kDa 
• Atom Count: 6,588 
• Modeled Residue Count: 855 
• Deposited Residue Count: 1,323 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transthyretin	A, B, C, D, E, F, G, H, I	147	Homo sapiens	Mutation(s): 1
UniProt & NIH Common Fund Data Resources
Find proteins for P02766 (Homo sapiens) Explore P02766  Go to UniProtKB:  P02766
PHAROS:  P02766 GTEx:  ENSG00000118271

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.80 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487
MODEL REFINEMENT	Coot
RECONSTRUCTION	RELION	4.0

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-01-21 
Deposition Author(s): Yu, J., Zhang, X., Boland, A.

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Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	310030_185235
Swiss National Science Foundation	Switzerland	TMSGI3_211581

Revision History  

• Version 1.0: 2026-01-21
  Type: Initial release
  
• Version 1.1: 2026-05-06
  Changes: Data collection, Database references