5GHE

Crystal Structure of Bacillus thuringiensis Cry6Aa2 Protoxin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.901 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of Cry6Aa: A novel nematicidal ClyA-type alpha-pore-forming toxin from Bacillus thuringiensis

Huang, J.Guan, Z.Wan, L.Zou, T.Sun, M.

(2016) Biochem.Biophys.Res.Commun. 478: 307-313

  • DOI: 10.1016/j.bbrc.2016.07.002

  • PubMed Abstract: 
  • Crystal (Cry) proteins from Bacillus thuringiensis (Bt) are globally used in agriculture as proteinaceous insecticides. Numerous crystal structures have been determined, and most exhibit conserved three-dimensional architectures. Recently, we have id ...

    Crystal (Cry) proteins from Bacillus thuringiensis (Bt) are globally used in agriculture as proteinaceous insecticides. Numerous crystal structures have been determined, and most exhibit conserved three-dimensional architectures. Recently, we have identified a novel nematicidal mechanism by which Cry6Aa triggers cell death through a necrosis-signaling pathway via an interaction with the host protease ASP-1. However, we found little sequence conservation of Cry6Aa in our functional study. Here, we report the 1.90 angstrom (Å) resolution structure of the proteolytic form of Cry6Aa (1-396), determined by X-ray crystallography. The structure of Cry6Aa is highly similar to those of the pathogenic toxin family of ClyA-type α-pore-forming toxins (α-PFTs), which are characterized by a bipartite structure comprising a head domain and a tail domain, thus suggesting that Cry6Aa exhibits a previously undescribed nematicidal mode of action. This structure also provides a framework for the functional study of other nematicidal toxins.


    Organizational Affiliation

    College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pesticidal crystal protein Cry6Aa
A
428Bacillus thuringiensisMutation(s): 0 
Gene Names: cry6Aa (cryVIa, cryVIA(a))
Find proteins for Q45757 (Bacillus thuringiensis)
Go to UniProtKB:  Q45757
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.901 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.167 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 101.637α = 90.00
b = 101.637β = 90.00
c = 78.905γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data processing
HKL-2000data collection
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2016-08-17
    Type: Database references