Cryo-EM of Form 1 related peptide filament, 36-31-3

Experimental Data Snapshot

  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report

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Structural analysis of cross alpha-helical nanotubes provides insight into the designability of filamentous peptide nanomaterials.

Wang, F.Gnewou, O.Modlin, C.Beltran, L.C.Xu, C.Su, Z.Juneja, P.Grigoryan, G.Egelman, E.H.Conticello, V.P.

(2021) Nat Commun 12: 407-407

  • DOI: https://doi.org/10.1038/s41467-020-20689-w
  • Primary Citation of Related Structures:  
    6WKX, 6WKY, 6WL0, 6WL1, 6WL7, 6WL8, 6WL9

  • PubMed Abstract: 

    The exquisite structure-function correlations observed in filamentous protein assemblies provide a paradigm for the design of synthetic peptide-based nanomaterials. However, the plasticity of quaternary structure in sequence-space and the lability of helical symmetry present significant challenges to the de novo design and structural analysis of such filaments. Here, we describe a rational approach to design self-assembling peptide nanotubes based on controlling lateral interactions between protofilaments having an unusual cross-α supramolecular architecture. Near-atomic resolution cryo-EM structural analysis of seven designed nanotubes provides insight into the designability of interfaces within these synthetic peptide assemblies and identifies a non-native structural interaction based on a pair of arginine residues. This arginine clasp motif can robustly mediate cohesive interactions between protofilaments within the cross-α nanotubes. The structure of the resultant assemblies can be controlled through the sequence and length of the peptide subunits, which generates synthetic peptide filaments of similar dimensions to flagella and pili.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, 22908, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
peptide 36-31-336synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United StatesNSF-DMR-1533958

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-02
    Type: Initial release
  • Version 1.1: 2021-12-15
    Changes: Database references