6DJ4

Crystal Structure of Bacillus thuringiensis Cry1A.105 Tryptic Core


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Safety of the Bacillus thuringiensis-derived Cry1A.105 protein: Evidence that domain exchange preserves mode of action and safety.

Wang, C.Li, W.Kessenich, C.R.Petrick, J.S.Rydel, T.J.Sturman, E.J.Lee, T.C.Glenn, K.C.Edrington, T.C.

(2018) Regul. Toxicol. Pharmacol. 99: 50-60

  • DOI: 10.1016/j.yrtph.2018.09.003

  • PubMed Abstract: 
  • The lepidopteran-active Cry1A.105 protein is a chimeric three-domain insecticidal toxin with distinct structural domains derived from the naturally occurring Cry1Ab, Cry1Ac and Cry1F proteins from the soil bacterium Bacillus thuringiensis (Bt). The X ...

    The lepidopteran-active Cry1A.105 protein is a chimeric three-domain insecticidal toxin with distinct structural domains derived from the naturally occurring Cry1Ab, Cry1Ac and Cry1F proteins from the soil bacterium Bacillus thuringiensis (Bt). The X-ray crystal structure of the Cry1A.105 tryptic core at 3.0 Å resolution demonstrates its high structural similarity to the tryptic core of Cry1Ac. Bioinformatics analyses demonstrate that Cry1A.105 has no significant amino acid sequence similarity to known allergens or mammalian toxins, which is the same conclusion reached for its component domains. Like its intact donor proteins, Cry1A.105 was heat labile at temperatures ≥75 °C and degraded upon exposure to gastrointestinal proteases. No adverse effects were observed in mice when Cry1A.105 was dosed orally at 2451 mg/kg body weight. Therefore, the weight of evidence supports that Cry1A.105 is safe for human and animal consumption. These results support the conclusion that the safety of a chimeric protein for human or animal consumption can be evaluated in the context of the safety of its donor proteins.


    Organizational Affiliation

    Bayer U.S., Crop Science Division, 700 Chesterfield Pkwy West, Chesterfield, MO 63017, USA. Electronic address: Cunxi.wang@bayer.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cry1A.105
A
591Bacillus thuringiensisMutation(s): 0 
Gene Names: cryIA(c),
Find proteins for O32306 (Bacillus thuringiensis)
Go to UniProtKB:  O32306
Find proteins for V9I164 (Bacillus thuringiensis)
Go to UniProtKB:  V9I164
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.219 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 124.375α = 90.00
b = 49.441β = 108.65
c = 103.692γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-09-12
    Type: Initial release
  • Version 1.1: 2018-09-26
    Type: Data collection, Database references, Structure summary