Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 37509.21 
• Atom Count: 2266 
• Residue Count: 329 
• Unique protein chains: 1

2WTC

CRYSTAL STRUCTURE OF CHK2 IN COMPLEX WITH AN INHIBITOR

• DOI: 10.2210/pdb2WTC/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2009-09-15 Released: 2009-12-29 
• Deposition Author(s): Hilton, S., Naud, S., Caldwell, J.J., Boxall, K., Burns, S., Anderson, V.E., Antoni, L., Allen, C.E., Pearl, L.H., Oliver, A.W., Aherne, G.W., Garrett, M.D., Collins, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3 Å
• R-Value Free: 0.237 
• R-Value Work: 0.180 

Literature

Identification and Characterisation of 2-Aminopyridine Inhibitors of Checkpoint Kinase 2

Hilton, S., Naud, S., Caldwell, J.J., Boxall, K., Burns, S., Anderson, V.E., Antoni, L., Allen, C.E., Pearl, L.H., Oliver, A.W., Aherne, G.W., Garrett, M.D., Collins, I.

(2010) Bioorg.Med.Chem. 18: 707

• PubMed: 20022510 
• DOI: 10.1016/j.bmc.2009.11.058
• Primary Citation of Related Structures:  
  2WTJ, 2WTI, 2WTD


• PubMed Abstract: 
  

5-(Hetero)aryl-3-(4-carboxamidophenyl)-2-aminopyridine inhibitors of CHK2 were identified from high throughput screening of a kinase-focussed compound library. Rapid exploration of the hits through straightforward chemistry established structure-activity relationships and a proposed ATP-competitive binding mode which was verified by X-ray crystallography of several analogues bound to CHK2. Variation of the 5-(hetero)aryl substituent identified bicyclic dioxolane and dioxane groups which improved the affinity and the selectivity of the compounds for CHK2 versus CHK1. The 3-(4-carboxamidophenyl) substituent could be successfully replaced by acyclic omega-aminoalkylamides, which made additional polar interactions within the binding site and led to more potent inhibitors of CHK2. Compounds from this series showed activity in cell-based mechanistic assays for inhibition of CHK2.

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Organizational Affiliation: 

Cancer Research UK Centre for Cancer Therapeutics, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey SM2 5NG, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
SERINE/THREONINE-PROTEIN KINASE CHK2	A	329	Homo sapiens	Mutation(s): 0  Gene Names: CHEK2 (CDS1, CHK2, RAD53) EC: 2.7.11.1
Find proteins for O96017 (Homo sapiens) Go to Gene View: CHEK2 Go to UniProtKB:  O96017

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
VGM	A	4-[2-AMINO-5-(4-HYDROXY-3-METHOXYPHENYL)PYRIDIN-3-YL]BENZAMIDE C19 H17 N3 O3 MGGHBVJICDPMQM-UHFFFAOYSA-N
NO3	A	NITRATE ION N O3 NHNBFGGVMKEFGY-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
VGM	IC50: 310 nM (100) BINDINGDB
VGM	IC50: 310 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3 Å
• R-Value Free: 0.237 
• R-Value Work: 0.180 
• Space Group: P 3₂ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 90.820	α = 90.00
b = 90.820	β = 90.00
c = 92.540	γ = 120.00

Software Package:

Software Name	Purpose
PHASER	phasing
MOSFLM	data reduction
SCALA	data scaling
PHENIX	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-09-15 
• Released Date: 2009-12-29 
• Deposition Author(s): Hilton, S., Naud, S., Caldwell, J.J., Boxall, K., Burns, S., Anderson, V.E., Antoni, L., Allen, C.E., Pearl, L.H., Oliver, A.W., Aherne, G.W., Garrett, M.D., Collins, I.

Revision History 

• Version 1.0: 2009-12-29
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance