AL amyloid fibril from a lambda 1 light chain

Experimental Data Snapshot

  • Resolution: 3.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

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This is version 1.1 of the entry. See complete history


Cryo-EM structure of a light chain-derived amyloid fibril from a patient with systemic AL amyloidosis.

Radamaker, L.Lin, Y.H.Annamalai, K.Huhn, S.Hegenbart, U.Schonland, S.O.Fritz, G.Schmidt, M.Fandrich, M.

(2019) Nat Commun 10: 1103-1103

  • DOI: https://doi.org/10.1038/s41467-019-09032-0
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Amyloid fibrils derived from antibody light chains are key pathogenic agents in systemic AL amyloidosis. They can be deposited in multiple organs but cardiac amyloid is the major risk factor of mortality. Here we report the structure of a λ1 AL amyloid fibril from an explanted human heart at a resolution of 3.3 Å which we determined using cryo-electron microscopy. The fibril core consists of a 91-residue segment presenting an all-beta fold with ten mutagenic changes compared to the germ line. The conformation differs substantially from natively folded light chains: a rotational switch around the intramolecular disulphide bond being the crucial structural rearrangement underlying fibril formation. Our structure provides insight into the mechanism of protein misfolding and the role of patient-specific mutations in pathogenicity.

  • Organizational Affiliation

    Institute of Protein Biochemistry, Ulm University, 89081, Ulm, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
lambda 1 light chain fragment, residues 3-118
A, B, C, D, E
A, B, C, D, E, F, G, H
116Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Other