3E8Y

Xray structure of scorpion toxin BmBKTx1

• PDB DOI: https://doi.org/10.2210/pdb3E8Y/pdb

• Classification: TOXIN
• Organism(s): Mesobuthus martensii
• Mutation(s): No 


• Deposited: 2008-08-20 Released: 2009-02-10 
• Deposition Author(s): Mandal, K., Pentelute, B.L., Tereshko, V., Kossiakoff, A.A., Kent, S.B.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 0.217 
• R-Value Work: 0.200 
• R-Value Observed: 0.202 

Literature

X-ray structure of native scorpion toxin BmBKTx1 by racemic protein crystallography using direct methods.

Mandal, K., Pentelute, B.L., Tereshko, V., Kossiakoff, A.A., Kent, S.B.

(2009) J Am Chem Soc 131: 1362-1363

• PubMed: 19133782 
• DOI: https://doi.org/10.1021/ja8077973
• Primary Citation of Related Structures:  
  3E8Y


• PubMed Abstract: 
  

  Racemic protein crystallography, enabled by total chemical synthesis, has allowed us to determine the X-ray structure of native scorpion toxin BmBKTx1; direct methods were used for phase determination. This is the first example of a protein racemate that crystallized in space group I41/a.

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Organizational Affiliation: 

Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3.48 kDa 
• Atom Count: 268 
• Modelled Residue Count: 30 
• Deposited Residue Count: 31 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Potassium channel toxin alpha-KTx 19.1	A [auth X]	31	N/A	Mutation(s): 0
UniProt
Find proteins for P83407 (Mesobuthus martensii) Explore P83407  Go to UniProtKB:  P83407

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth X]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CL	B [auth X]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 0.217 
• R-Value Work: 0.200 
• R-Value Observed: 0.202 
• Space Group: I 4₁/a

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.633	α = 90
b = 56.633	β = 90
c = 31.759	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SHELXS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-02-10 
Deposition Author(s): Mandal, K., Pentelute, B.L., Tereshko, V., Kossiakoff, A.A., Kent, S.B.H.

Revision History  

• Version 1.0: 2009-02-10
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance