4KYP

Beta-Scorpion Toxin folded in the periplasm of E.coli

• PDB DOI: https://doi.org/10.2210/pdb4KYP/pdb

• Classification: TOXIN
• Organism(s): Hottentotta judaicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-05-29 Released: 2014-02-12 
• Deposition Author(s): O'Reilly, A.O., Cole, A.R., Lopes, J.L., Lampert, A., Wallace, B.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.229 
• R-Value Work: 0.197 
• R-Value Observed: 0.199 

Literature

Chaperone-mediated native folding of a beta-scorpion toxin in the periplasm of Escherichia coli.

O'Reilly, A.O., Cole, A.R., Lopes, J.L., Lampert, A., Wallace, B.A.

(2014) Biochim Biophys Acta 1840: 10-15

• PubMed: 23999087 
• DOI: https://doi.org/10.1016/j.bbagen.2013.08.021
• Primary Citation of Related Structures:  
  4KYP


• PubMed Abstract: 
  

  Animal neurotoxin peptides are valuable probes for investigating ion channel structure/function relationships and represent lead compounds for novel therapeutics and insecticides. However, misfolding and aggregation are common outcomes when toxins containing multiple disulfides are expressed in bacteria.

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Organizational Affiliation: 

Department of Physiology and Pathophysiology, Friedrich-Alexander Universität Erlangen-Nürnberg, Universitätsstraße 17, 91054 Erlangen, Germany.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors and generated by PISA (software)

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 38.25 kDa 
• Atom Count: 2,610 
• Modelled Residue Count: 289 
• Deposited Residue Count: 336 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-insect excitatory toxin Bj-xtrIT	A, B, C, D	84	Hottentotta judaicus	Mutation(s): 0  Gene Names: XTRIT
UniProt
Find proteins for P56637 (Hottentotta judaicus) Explore P56637  Go to UniProtKB:  P56637

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PG4	G [auth D]	TETRAETHYLENE GLYCOL C8 H18 O5 UWHCKJMYHZGTIT-UHFFFAOYSA-N
PGE	E [auth A], F [auth C]	TRIETHYLENE GLYCOL C6 H14 O4 ZIBGPFATKBEMQZ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.229 
• R-Value Work: 0.197 
• R-Value Observed: 0.199 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.87	α = 90
b = 88.56	β = 90
c = 183.58	γ = 90

Software Package:

Software Name	Purpose
DNA	data collection
PHASER	phasing
BUSTER	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-02-12 
Deposition Author(s): O'Reilly, A.O., Cole, A.R., Lopes, J.L., Lampert, A., Wallace, B.A.

Revision History  

• Version 1.0: 2014-02-12
  Type: Initial release
  
• Version 1.1: 2018-01-24
  Changes: Structure summary