4W8J

Structure of the full-length insecticidal protein Cry1Ac reveals intriguing details of toxin packaging into in vivo formed crystals

• PDB DOI:  https://doi.org/10.2210/pdb4W8J/pdb

• Classification: TOXIN
• Organism(s): Bacillus thuringiensis serovar kurstaki str. HD73
• Expression System: Bacillus thuringiensis
• Mutation(s): Yes 


• Deposited: 2014-08-25 Released: 2014-09-17 
• Deposition Author(s): Evdokimov, A.G., Moshiri, F., Sturman, E.J., Rydel, T.J., Zheng, M., Seale, J.W., Franklin, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.78 Å
• R-Value Free: 0.332 
• R-Value Work: 0.226 
• R-Value Observed: 0.232 

Literature

Structure of the full-length insecticidal protein Cry1Ac reveals intriguing details of toxin packaging into in vivo formed crystals.

Evdokimov, A.G., Moshiri, F., Sturman, E.J., Rydel, T.J., Zheng, M., Seale, J.W., Franklin, S.

(2014) Protein Sci 23: 1491-1497

• PubMed: 25139047 
• DOI: https://doi.org/10.1002/pro.2536
• Primary Citation of Related Structures:  
  4W8J


• PubMed Abstract: 
  

For almost half a century, the structure of the full-length Bacillus thuringiensis (Bt) insecticidal protein Cry1Ac has eluded researchers, since Bt-derived crystals were first characterized in 1965. Having finally solved this structure we report intriguing details of the lattice-based interactions between the toxic core of the protein and the protoxin domains. The structure provides concrete evidence for the function of the protoxin as an enhancer of native crystal packing and stability.

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Organizational Affiliation: 

Monsanto, GG4D 700 Chesterfield Parkway West, Chesterfield, Missouri, 63017.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 134.14 kDa 
• Atom Count: 8,206 
• Modelled Residue Count: 1,017 
• Deposited Residue Count: 1,184 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Pesticidal crystal protein cry1Ac	A	1,184	Bacillus thuringiensis serovar kurstaki str. HD73	Mutation(s): 14  Gene Names: HD73_6004
UniProt
Find proteins for P05068 (Bacillus thuringiensis subsp. kurstaki) Explore P05068  Go to UniProtKB:  P05068

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	E [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
K	B [auth A], C [auth A], D [auth A]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.78 Å
• R-Value Free: 0.332 
• R-Value Work: 0.226 
• R-Value Observed: 0.232 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 87.314	α = 90
b = 87.314	β = 90
c = 266.396	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-09-17 
Deposition Author(s): Evdokimov, A.G., Moshiri, F., Sturman, E.J., Rydel, T.J., Zheng, M., Seale, J.W., Franklin, S.

Revision History  

• Version 1.0: 2014-09-17
  Type: Initial release
  
• Version 1.1: 2014-11-05
  Changes: Database references