6OWK

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.228 

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:  
    6OVB, 6OWK

  • PubMed Abstract: 
  • Two new modified Bacillus thuringiensis ( Bt ) proteins, Cry1Da_7 and Cry1B.868, with activity against fall armyworms (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 (PIPs) in row crops ...

    Two new modified Bacillus thuringiensis ( Bt ) proteins, Cry1Da_7 and Cry1B.868, with activity against fall armyworms (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 (PIPs) 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 utilizations of the newly modified Cry1Da_7 and Cry1B.868 proteins are distinct from each other and from those of 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 those of 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

    Plant Biotechnology Program, Bayer Crop Science, Chesterfield, Missouri, USA agoston.jerga@bayer.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Pesticidal crystal protein Cry1Be, Cry1K-like protein chimeraA617Bacillus thuringiensisMutation(s): 2 
Gene Names: cry1Be158C2BcryIB(e)
UniProt
Find proteins for Q45715 (Bacillus thuringiensis subsp. morrisoni)
Explore Q45715 
Go to UniProtKB:  Q45715
Find proteins for O85805 (Bacillus thuringiensis)
Explore O85805 
Go to UniProtKB:  O85805
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.228 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.176α = 90
b = 106.176β = 90
c = 85.302γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

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