4FSW

Crystal Structure of the CHK1

• PDB DOI: https://doi.org/10.2210/pdb4FSW/pdb

• Classification: TRANSFERASE/TRANSFERASE inhibitor
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2012-06-27 Released: 2012-08-22 
• Deposition Author(s): Kang, Y.N., Stuckey, J.A., Chang, P., Russell, A.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.212 
• R-Value Work: 0.184 
• R-Value Observed: 0.185 

Literature

Crystal Structure of the CHK1

Kang, Y.N., Stuckey, J.A., Chang, P., Russell, A.J.

To be published.

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: 32.57 kDa 
• Atom Count: 2,323 
• Modelled Residue Count: 266 
• Deposited Residue Count: 279 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase Chk1	A	279	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 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HK6	B [auth A]	8-chloro-5,10-dihydro-11H-dibenzo[b,e][1,4]diazepin-11-one C13 H9 Cl N2 O YVWNDABPZGGQFE-UHFFFAOYSA-N
SO4	C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
IPA	D [auth A]	ISOPROPYL ALCOHOL C3 H8 O KFZMGEQAYNKOFK-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CSO	A	L-PEPTIDE LINKING	C3 H7 N O3 S		CYS

Binding Affinity Annotations
ID	Source	Binding Affinity
HK6	BindingDB:  4FSW	Ki: min: 1.58e+4, max: 1.72e+4 (nM) from 2 assay(s)
		IC50: min: 1.70e+4, max: 1.72e+4 (nM) from 2 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.212 
• R-Value Work: 0.184 
• R-Value Observed: 0.185 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.227	α = 90
b = 65.845	β = 94.64
c = 58.079	γ = 90

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
BUSTER-TNT	refinement
PDB_EXTRACT	data extraction
BUSTER	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-08-22 
Deposition Author(s): Kang, Y.N., Stuckey, J.A., Chang, P., Russell, A.J.

Revision History  

• Version 1.0: 2012-08-22
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Data collection, Database references, Derived calculations