3WA1

Crystal structure of BinB: A receptor binding component of the binary toxin from Lysinibacillus sphaericus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

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Literature

Crystal structure of BinB: A receptor binding component of the binary toxin from Lysinibacillus sphaericus

Srisucharitpanit, K.Yao, M.Promdonkoy, B.Chimnaronk, S.Tanaka, I.Boonserm, P.

(2014) Proteins 82: 2703-2712

  • DOI: 10.1002/prot.24636
  • Primary Citation of Related Structures:  
    3WA1

  • PubMed Abstract: 
  • The binary toxin (Bin), produced by Lysinibacillus sphaericus, is composed of BinA (42 kDa) and BinB (51 kDa) proteins, which are both required for full toxicity against Culex and Anopheles mosquito larvae. Specificity of Bin toxin is determined by the binding of BinB component to a receptor present on the midgut epithelial membranes, while BinA is proposed to be a toxic component ...

    The binary toxin (Bin), produced by Lysinibacillus sphaericus, is composed of BinA (42 kDa) and BinB (51 kDa) proteins, which are both required for full toxicity against Culex and Anopheles mosquito larvae. Specificity of Bin toxin is determined by the binding of BinB component to a receptor present on the midgut epithelial membranes, while BinA is proposed to be a toxic component. Here, we determined the first crystal structure of the active form of BinB at a resolution of 1.75 Å. BinB possesses two distinct structural domains in its N- and C-termini. The globular N-terminal domain has a β-trefoil scaffold which is a highly conserved architecture of some sugar binding proteins or lectins, suggesting a role of this domain in receptor-binding. The BinB β-rich C-terminal domain shares similar three-dimensional folding with aerolysin type β-pore forming toxins, despite a low sequence identity. The BinB structure, therefore, is a new member of the aerolysin-like toxin family, with probably similarities in the cytolytic mechanism that takes place via pore formation.


    Organizational Affiliation

    Institute of Molecular Biosciences, Mahidol University, Salaya, Phuttamonthon, Nakhon Pathom, 73170, Thailand; Faculty of Allied Health Science, Burapha University, Saensook, Muang District, Chon Buri, 20131, Thailand.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BinB proteinA389Lysinibacillus sphaericusMutation(s): 0 
Gene Names: binBsph04
Find proteins for P18568 (Lysinibacillus sphaericus)
Explore P18568 
Go to UniProtKB:  P18568
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.21α = 90
b = 95.21β = 90
c = 154.891γ = 120
Software Package:
Software NamePurpose
BSSdata collection
SHELXmodel building
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SHELXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-07-02
    Type: Initial release
  • Version 1.1: 2014-10-08
    Changes: Database references, Structure summary