3U9N | pdb_00003u9n

X-ray crystal structure of compound 1 bound to human CHK1 kinase domain

• PDB DOI: https://doi.org/10.2210/pdb3U9N/pdb

• Classification: TRANSFERASE/TRANSFERASE INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2011-10-19 Released: 2012-01-25 
• Deposition Author(s): Fischmann, T.O.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 
  0.229 (Depositor), 0.240 (DCC) 
• R-Value Work: 
  0.196 (Depositor), 0.210 (DCC) 
• R-Value Observed: 
  0.197 (Depositor) 

Literature

Discovery of a Novel Series of CHK1 Kinase Inhibitors with Distinctive Hinge Binding Mode

Huang, X., Cheng, C.C., Fischmann, T.O., Duca, J.S., Yang, X., Richards, M., Shipps Jr., G.W.

(2012) ACS Med Chem Lett 

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 31.86 kDa 
• Atom Count: 2,291 
• Modelled Residue Count: 258 
• Deposited Residue Count: 273 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase Chk1	A	273	Homo sapiens	Mutation(s): 0  Gene Names: CHEK1, CHK1 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
09H	B [auth A]	2-(2,3-dihydro-1-benzofuran-5-yl)-N-[2-(piperazin-1-yl)phenyl]-1,3-thiazole-4-carboxamide C22 H22 N4 O2 S WRGSHXQBWJUKQD-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
09H	BindingDB:  3U9N	Kd: 100 (nM) from 1 assay(s)
		IC50: 75 (nM) from 1 assay(s)
		EC50: 1.00e+4 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free:  0.229 (Depositor), 0.240 (DCC) 
• R-Value Work:  0.196 (Depositor), 0.210 (DCC) 
• R-Value Observed: 0.197 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.16	α = 90
b = 65.68	β = 102.63
c = 54.78	γ = 90

Software Package:

Software Name	Purpose
JDirector	data collection
TNT	refinement
BUSTER	refinement
DENZO	data reduction
SCALEPACK	data scaling
TNT	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-01-25 
Deposition Author(s): Fischmann, T.O.

Revision History  

• Version 1.0: 2012-01-25
  Type: Initial release
  
• Version 1.1: 2012-02-01
  Changes: Database references
• Version 1.2: 2024-02-28
  Changes: Data collection, Database references, Derived calculations