4BHN

Crystal Structures of Ask1-inhibitor Complexes

• PDB DOI: https://doi.org/10.2210/pdb4BHN/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 


• Deposited: 2013-04-04 Released: 2013-07-03 
• Deposition Author(s): Singh, O., Shillings, A., Craggs, P., Wall, I., Rowland, P., Skarzynski, T., Hobbs, C.I., Hardwick, P., Tanner, R., Blunt, M., Witty, D.R., Smith, K.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.235 
• R-Value Work: 0.196 
• R-Value Observed: 0.197 

Starting Model: experimental

Literature

Crystal Structures of Ask1-Inhibtor Complexes Provide a Platform for Structure Based Drug Design.

Singh, O., Shillings, A., Craggs, P., Wall, I., Rowland, P., Skarzynski, T., Hobbs, C.I., Hardwick, P., Tanner, R., Blunt, M., Witty, D.R., Smith, K.J.

(2013) Protein Sci 22: 1071

• PubMed: 23776076 
• DOI: https://doi.org/10.1002/pro.2298
• Primary Citation of Related Structures:  
  4BF2, 4BHN, 4BIB, 4BIC, 4BID, 4BIE


• PubMed Abstract: 
  

  ASK1, a member of the MAPK Kinase Kinase family of proteins has been shown to play a key role in cancer, neurodegeneration and cardiovascular diseases and is emerging as a possible drug target. Here we describe a 'replacement-soaking' method that has enabled the high-throughput X-ray structure determination of ASK1/ligand complexes. Comparison of the X-ray structures of five ASK1/ligand complexes from 3 different chemotypes illustrates that the ASK1 ATP binding site is able to accommodate a range of chemical diversity and different binding modes. The replacement-soaking system is also able to tolerate some protein flexibility. This crystal system provides a robust platform for ASK1/ligand structure determination and future structure based drug design.

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Organizational Affiliation: 

GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, United Kingdom.

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)

Macromolecule Content

• Total Structure Weight: 75.94 kDa 
• Atom Count: 4,290 
• Modelled Residue Count: 513 
• Deposited Residue Count: 668 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MITOGEN-ACTIVATED PROTEIN KINASE KINASE KINASE 5	A, B	334	Homo sapiens	Mutation(s): 1  EC: 2.7.11.25
UniProt & NIH Common Fund Data Resources
Find proteins for Q99683 (Homo sapiens) Go to UniProtKB:  Q99683
PHAROS:  Q99683 GTEx:  ENSG00000197442

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BH9	C [auth A], E [auth B]	4-tert-butyl-N-[6-(1H-pyrazol-4-yl)imidazo[1,2-a]pyridin-2-yl]benzamide C21 H21 N5 O XBKNNPZVSZKDRB-UHFFFAOYSA-N
GOL	D [auth A], F [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
BH9	PDBBind:  4BHN	IC50: 6.31 (nM) from 1 assay(s)
	BindingDB:  4BHN	IC50: 6.3 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.235 
• R-Value Work: 0.196 
• R-Value Observed: 0.197 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.493	α = 90
b = 77.493	β = 90
c = 423.834	γ = 120

Software Package:

Software Name	Purpose
BUSTER	refinement
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-07-03 
Deposition Author(s): Singh, O., Shillings, A., Craggs, P., Wall, I., Rowland, P., Skarzynski, T., Hobbs, C.I., Hardwick, P., Tanner, R., Blunt, M., Witty, D.R., Smith, K.J.

Revision History  

• Version 1.0: 2013-07-03
  Type: Initial release
  
• Version 1.1: 2013-08-07
  Changes: Database references
• Version 1.2: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description