5V8U

Small Molecule Inhibitor ABS-143 Bound to the Botulinum Neurotoxin Serotype A Light Chain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.230 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Small molecule metalloprotease inhibitor with in vitro, ex vivo and in vivo efficacy against botulinum neurotoxin serotype A.

Jacobson, A.R.Adler, M.Silvaggi, N.R.Allen, K.N.Smith, G.M.Fredenburg, R.A.Stein, R.L.Park, J.B.Feng, X.Shoemaker, C.B.Deshpande, S.S.Goodnough, M.C.Malizio, C.J.Johnson, E.A.Pellett, S.Tepp, W.H.Tzipori, S.

(2017) Toxicon 137: 36-47

  • DOI: https://doi.org/10.1016/j.toxicon.2017.06.016
  • Primary Citation of Related Structures:  
    5V8P, 5V8R, 5V8U

  • PubMed Abstract: 

    Botulinum neurotoxins (BoNTs) are the most toxic substances known to mankind and are the causative agents of the neuroparalytic disease botulism. Their ease of production and extreme toxicity have caused these neurotoxins to be classified as Tier 1 bioterrorist threat agents and have led to a sustained effort to develop countermeasures to treat intoxication in case of a bioterrorist attack. While timely administration of an approved antitoxin is effective in reducing the severity of botulism, reversing intoxication requires different strategies. In the present study, we evaluated ABS 252 and other mercaptoacetamide small molecule active-site inhibitors of BoNT/A light chain using an integrated multi-assay approach. ABS 252 showed inhibitory activity in enzymatic, cell-based and muscle activity assays, and importantly, produced a marked delay in time-to-death in mice. The results suggest that a multi-assay approach is an effective strategy for discovery of potential BoNT therapeutic candidates.


  • Organizational Affiliation

    Absolute Science, Inc., Denver, CO, 80222, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Botulinum neurotoxin type A
A, B
444Clostridium botulinumMutation(s): 1 
Gene Names: botAatxbna
EC: 3.4.24.69
UniProt
Find proteins for P0DPI1 (Clostridium botulinum (strain Hall / ATCC 3502 / NCTC 13319 / Type A))
Explore P0DPI1 
Go to UniProtKB:  P0DPI1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DPI1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.095α = 90
b = 67.653β = 105.22
c = 98.087γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-08-02
    Changes: Database references
  • Version 1.2: 2023-10-04
    Changes: Data collection, Database references, Derived calculations, Refinement description