2X8E

Discovery of a Novel Class of triazolones as Checkpoint Kinase Inhibitors - Hit to Lead Exploration


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.235 

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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Discovery of a Novel Class of Triazolones as Checkpoint Kinase Inhibitors-Hit to Lead Exploration.

Oza, V.Ashwell, S.Brassil, P.Breed, J.Deng, C.Ezhuthachan, J.Haye, H.Horn, C.Janetka, J.Lyne, P.Newcombe, N.Otterbien, L.Pass, M.Read, J.A.Roswell, S.Su, M.Toader, D.Yu, D.Yu, Y.Valentine, A.Webborn, P.White, A.Zabludoff, S.Zheng, X.

(2010) Bioorg Med Chem 20: 5133

  • DOI: 10.1016/j.bmcl.2010.07.015
  • Primary Citation of Related Structures:  
    2X8D, 2X8E, 2X8I

  • PubMed Abstract: 
  • Checkpoint Kinase-1 (Chk1, CHK1, CHEK1) is a Ser/Thr protein kinase that mediates cellular responses to DNA-damage. A novel class of Chk1 inhibitors, triazoloquinolones/triazolones (TZ's) was identified by high throughput screening. The optimization of these hits to provide a lead series is described ...

    Checkpoint Kinase-1 (Chk1, CHK1, CHEK1) is a Ser/Thr protein kinase that mediates cellular responses to DNA-damage. A novel class of Chk1 inhibitors, triazoloquinolones/triazolones (TZ's) was identified by high throughput screening. The optimization of these hits to provide a lead series is described.


    Organizational Affiliation

    AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham, MA 02451, USA. Vibha.Oza@astrazeneca.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE-PROTEIN KINASE CHK1A276Homo sapiensMutation(s): 0 
Gene Names: CHEK1CHK1
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
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
X8E (Subject of Investigation/LOI)
Query on X8E

Download Ideal Coordinates CCD File 
B [auth A]5-METHYL-8-PYRIDIN-4-YL[1,2,4]TRIAZOLO[4,3-A]QUINOLIN-1(2H)-ONE
C16 H12 N4 O
PKZCGWBROCHAKF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A], D [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
X8E PDBBind:  2X8E IC50: 14 (nM) from 1 assay(s)
BindingDB:  2X8E IC50: 14 (nM) from 1 assay(s)
Binding MOAD:  2X8E IC50: 14 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.235 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.055α = 90
b = 65.858β = 101.73
c = 54.468γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-08-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-08
    Changes: Data collection, Experimental preparation, Other
  • Version 1.4: 2019-07-24
    Changes: Data collection