2E9U

Structure of h-CHK1 complexed with A780125

• PDB DOI: https://doi.org/10.2210/pdb2E9U/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-01-27 Released: 2008-01-29 
• Deposition Author(s): Park, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.277 
• R-Value Work: 0.227 
• R-Value Observed: 0.242 

Literature

Structure-Based Design, Synthesis and Biological Evaluation of Potent Selective Macrocyclic Chk1 Inhibitors

Tong, Y., Claiborne, A., Stewart, K.D., Park, C., Kovar, P., Chen, Z., Credo, R.B., Gwaltney, S.L., Zhang, H., Rosenberg, S.H., Sham, H.L., Sowin, T.J., Lin, N.H.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 31.42 kDa 
• Atom Count: 2,491 
• Modelled Residue Count: 269 
• Deposited Residue Count: 269 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase Chk1	A	269	Homo sapiens	Mutation(s): 0  EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O14757 (Homo sapiens) Explore O14757  Go to UniProtKB:  O14757
PHAROS:  O14757 GTEx:  ENSG00000149554

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
A25	B [auth A]	18-CHLORO-11,12,13,14-TETRAHYDRO-1H,10H-8,4-(AZENO)-9,15,1,3,6-BENZODIOXATRIAZACYCLOHEPTADECIN-2-ONE C16 H17 Cl N4 O3 JRSWWYITYIOHOP-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
A25	PDBBind:  2E9U	Ki: 7.94 (nM) from 1 assay(s)
	BindingDB:  2E9U	Ki: 7.9 (nM) from 1 assay(s)
		IC50: 10 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.277 
• R-Value Work: 0.227 
• R-Value Observed: 0.242 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.075	α = 90
b = 65.82	β = 94.37
c = 57.945	γ = 90

Software Package:

Software Name	Purpose
CNX	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-01-29 
Deposition Author(s): Park, C.

Revision History  

• Version 1.0: 2008-01-29
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-03-13
  Changes: Data collection, Database references, Derived calculations