6OWK

Crystal structure of a Bacillus thuringiensis Cry1B.867 tryptic core variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.698 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Bacillus thuringiensis Cry1Da_7 and Cry1B.868 Protein Interactions with Novel Receptors Allow Control of Resistant Fall Armyworms, Spodoptera frugiperda (J.E. Smith).

Wang, Y.Wang, J.Fu, X.Nageotte, J.R.Silverman, J.Bretsnyder, E.C.Chen, D.Rydel, T.J.Bean, G.J.Li, K.S.Kraft, E.Gowda, A.Nance, A.Moore, R.G.Pleau, M.J.Milligan, J.S.Anderson, H.M.Asiimwe, P.Evans, A.Moar, W.J.Martinelli, S.Head, G.P.Haas, J.A.Baum, J.A.Yang, F.Kerns, D.L.Jerga, A.

(2019) Appl.Environ.Microbiol. 85: --

  • DOI: 10.1128/AEM.00579-19
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Two new modified <i>Bacillus thuringiensis </i> ( <i>Bt </i>) proteins, Cry1Da_7 and Cry1B.868, with activity against fall armyworm (FAW) <i>Spodoptera frugiperda </i> (J.E. Smith), were evaluated for their potential to bind new insect receptors co ...

    Two new modified Bacillus thuringiensis ( Bt ) proteins, Cry1Da_7 and Cry1B.868, with activity against fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith), were evaluated for their potential to bind new insect receptors compared to proteins currently deployed as plant incorporated protectants (PIP's) in row crops. Results from resistant insect bioassays, disabled insecticidal protein (DIP) bioassays, and cell-based assays using insect cells expressing individual receptors, demonstrate that receptor utilization of the newly modified Cry1Da_7 and Cry1B.868 proteins are distinct from each other and from commercially available Bt proteins such as Cry1F, Cry1A.105, Cry2Ab and Vip3A. Accordingly, these two proteins target different insect proteins in FAW midgut cells and when pyramided together, should provide durability in the field against this economically important pest. IMPORTANCE There is increased concern with the development of resistance to insecticidal proteins currently expressed in crop plants, especially against high resistance-risk pests such as fall armyworm (FAW), Spodoptera frugiperda , a maize pest that already has developed resistance to Bacillus thuringiensis ( Bt ) proteins such as Cry1F. Lepidopteran-specific proteins that bind new insect receptors will be critical in managing current Cry1F-resistant FAW and delaying future resistance development. Results from resistant insect assays, disabled insecticidal protein (DIP) bioassays, and cell-based assays using insect cells expressing individual receptors demonstrate that target receptors of the Cry1Da_7 and Cry1B.868 proteins are different from each other and from commercially available Bt proteins such as Cry1F, Cry1A.105, Cry2Ab and Vip3A. Therefore, pyramiding these two new proteins in maize will provide durable control of this economically important pest in production agriculture.


    Organizational Affiliation

    From the Plant Biotechnology Program, Bayer Crop Science, Chesterfield, MO 63017 agoston.jerga@bayer.com.,From the Regulatory Science Program, Bayer Crop Science, Chesterfield, MO 63017.,From the Department of Entomology, Texas A&M University, Entomology Research Laboratory 103J, College Station, TX 77843-2475.,From the Plant Biotechnology Program, Bayer Crop Science, Chesterfield, MO 63017.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pesticidal crystal protein Cry1Be, Cry1K-like protein chimera
A
617Bacillus thuringiensisMutation(s): 0 
Gene Names: cry1Be (158C2B, cryIB(e)),
Find proteins for O85805 (Bacillus thuringiensis)
Go to UniProtKB:  O85805
Find proteins for V9I1B1 (Bacillus thuringiensis)
Go to UniProtKB:  V9I1B1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.698 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.223 
  • Space Group: P 63
Unit Cell:
Length (Å)Angle (°)
a = 106.176α = 90.00
b = 106.176β = 90.00
c = 85.302γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
PHASERphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-06-19
    Type: Initial release
  • Version 1.1: 2019-08-14
    Type: Data collection, Database references