5ZI1

Crystal structure of Bacillus thuringiensis insecticidal crystal protein Cry7Ca1 (wild type)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of Bacillus thuringiensis Cry7Ca1 toxin active against Locusta migratoria manilensis.

Jing, X.Yuan, Y.Wu, Y.Wu, D.Gong, P.Gao, M.

(2019) Protein Sci 28: 609-619

  • DOI: 10.1002/pro.3561
  • Primary Citation of Related Structures:  
    5ZI1

  • PubMed Abstract: 
  • Insecticidal crystal (Cry) proteins produced by Bacillus thuringiensis (Bt) are widely used as environmentally friendly insecticides. As the only known Cry protein with insecticidal activity against Locusta migratoria manilensis, a locust subspecies that causes extensive destruction of crops, the Cry7Ca1 protein from Bt strain BTH-13 identified in our previous study is of particular interest to locust prevention and control ...

    Insecticidal crystal (Cry) proteins produced by Bacillus thuringiensis (Bt) are widely used as environmentally friendly insecticides. As the only known Cry protein with insecticidal activity against Locusta migratoria manilensis, a locust subspecies that causes extensive destruction of crops, the Cry7Ca1 protein from Bt strain BTH-13 identified in our previous study is of particular interest to locust prevention and control. However, the three-dimensional structure of Cry7Ca1 toxin (the active form of the Cry7Ca1 protein) and the mechanisms of the Cry7Ca1 insecticidal specificity remain largely elusive. Here, we report a 2.3 Å crystal structure of the Cry7Ca1 toxin and carry out a systematic comparison of all available Cry toxins structures. A cluster of six loops in Cry toxin domain II, named Apex here, are the most variable structural elements and were documented to contribute in insecticidal specificity. The Cry7Ca1 toxin Apex loops are different from those of other Cry toxins in length, conformation, and sequence. Electrostatic potential analysis further revealed that Cry7Ca1 is the only structure-available Cry toxin that does not have a high contrast of surface electrostatic potentials in the Apex. We further suggest that the L1/L2 loops in the center of the Cry7Ca1 Apex may be worthy of attention in future efforts to unravel the Cry7Ca1 insecticidal specificity as they exhibit unique features not found in the corresponding regions of other Cry toxins. Our work highlights the uniqueness of the Apex in the Cry7Ca1 toxin and may assist exploration of the insecticidal mechanism of the Cry7Ca1 against Locusta migratoria manilensis.


    Organizational Affiliation

    Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
insecticidal crystal protein Cry7CalA, B609Bacillus thuringiensisMutation(s): 0 
Gene Names: cry
UniProt
Find proteins for A9Q1Y3 (Bacillus thuringiensis)
Explore A9Q1Y3 
Go to UniProtKB:  A9Q1Y3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download Ideal Coordinates CCD File 
C [auth A]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.261α = 90
b = 235.959β = 116.53
c = 69.025γ = 90
Software Package:
Software NamePurpose
d*TREKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
d*TREKdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31170123

Revision History  (Full details and data files)

  • Version 1.0: 2018-12-26
    Type: Initial release
  • Version 1.1: 2019-02-27
    Changes: Data collection, Database references