Vip3Bc1 tetramer

Experimental Data Snapshot

  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Cryo-EM structures of an insecticidal Bt toxin reveal its mechanism of action on the membrane.

Byrne, M.J.Iadanza, M.G.Perez, M.A.Maskell, D.P.George, R.M.Hesketh, E.L.Beales, P.A.Zack, M.D.Berry, C.Thompson, R.F.

(2021) Nat Commun 12: 2791-2791

  • DOI: https://doi.org/10.1038/s41467-021-23146-4
  • Primary Citation of Related Structures:  
    6YRF, 6YRG, 7NTX

  • PubMed Abstract: 

    Insect pests are a major cause of crop losses worldwide, with an estimated economic cost of $470 billion annually. Biotechnological tools have been introduced to control such insects without the need for chemical pesticides; for instance, the development of transgenic plants harbouring genes encoding insecticidal proteins. The Vip3 (vegetative insecticidal protein 3) family proteins from Bacillus thuringiensis convey toxicity to species within the Lepidoptera, and have wide potential applications in commercial agriculture. Vip3 proteins are proposed to exert their insecticidal activity through pore formation, though to date there is no mechanistic description of how this occurs on the membrane. Here we present cryo-EM structures of a Vip3 family toxin in both inactive and activated forms in conjunction with structural and functional data on toxin-membrane interactions. Together these data demonstrate that activated Vip3Bc1 complex is able to insert into membranes in a highly efficient manner, indicating that receptor binding is the likely driver of Vip3 specificity.

  • Organizational Affiliation

    Corteva Agriscience, Indianapolis, IN, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Vegetative insecticidal protein
A, B, C, D
803Bacillus thuringiensisMutation(s): 0 
Gene Names: vip3Bc1
Find proteins for A0A290WPI2 (Bacillus thuringiensis)
Explore A0A290WPI2 
Go to UniProtKB:  A0A290WPI2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A290WPI2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-17
    Type: Initial release
  • Version 1.1: 2021-05-26
    Changes: Database references