5M51

Nek2 bound to arylaminopurine compound 8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.899 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure-guided design of purine-based probes for selective Nek2 inhibition.

Coxon, C.R.Wong, C.Bayliss, R.Boxall, K.Carr, K.H.Fry, A.M.Hardcastle, I.R.Matheson, C.J.Newell, D.R.Sivaprakasam, M.Thomas, H.Turner, D.Yeoh, S.Wang, L.Z.Griffin, R.J.Golding, B.T.Cano, C.

(2017) Oncotarget 8: 19089-19124

  • DOI: 10.18632/oncotarget.13249
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Nek2 (NIMA-related kinase 2) is a cell cycle-dependent serine/threonine protein kinase that regulates centrosome separation at the onset of mitosis. Overexpression of Nek2 is common in human cancers and suppression can restrict tumor cell growth and ...

    Nek2 (NIMA-related kinase 2) is a cell cycle-dependent serine/threonine protein kinase that regulates centrosome separation at the onset of mitosis. Overexpression of Nek2 is common in human cancers and suppression can restrict tumor cell growth and promote apoptosis. Nek2 inhibition with small molecules, therefore, offers the prospect of a new therapy for cancer. To achieve this goal, a better understanding of the requirements for selective-inhibition of Nek2 is required. 6-Alkoxypurines were identified as ATP-competitive inhibitors of Nek2 and CDK2. Comparison with CDK2-inhibitor structures indicated that judicious modification of the 6-alkoxy and 2-arylamino substituents could achieve discrimination between Nek2 and CDK2. In this study, a library of 6-cyclohexylmethoxy-2-arylaminopurines bearing carboxamide, sulfonamide and urea substituents on the 2-arylamino ring was synthesized. Few of these compounds were selective for Nek2 over CDK2, with the best result being obtained for 3-((6-(cyclohexylmethoxy)-9H-purin-2-yl)amino)-N,N-dimethylbenzamide (CDK2 IC50 = 7.0 μM; Nek2 IC50 = 0.62 μM) with >10-fold selectivity. Deletion of the 6-substituent abrogated activity against both Nek2 and CDK2. Nine compounds containing an (E)-dialkylaminovinyl substituent at C-6, all showed selectivity for Nek2, e.g. (E)-6-(2-(azepan-1-yl)vinyl)-N-phenyl-9H-purin-2-amine (CDK2 IC50 = 2.70 μM; Nek2 IC50 = 0.27 μM). Structural biology of selected compounds enabled a partial rationalization of the observed structure activity relationships and mechanism of Nek2 activation. This showed that carboxamide 11 is the first reported inhibitor of Nek2 in the DFG-in conformation.


    Organizational Affiliation

    Northern Institute for Cancer Research, School of Chemistry, Newcastle University, Newcastle upon Tyne, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase Nek2
A
279Homo sapiensMutation(s): 0 
Gene Names: NEK2 (NEK2A, NLK1)
EC: 2.7.11.1
Find proteins for P51955 (Homo sapiens)
Go to Gene View: NEK2
Go to UniProtKB:  P51955
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NU6
Query on NU6

Download SDF File 
Download CCD File 
A
3-[[6-(cyclohexylmethoxy)-9~{H}-purin-2-yl]amino]benzamide
C19 H22 N6 O2
XAOVCENYRWWHPR-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
NU6IC50: 19000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.899 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.222 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.717α = 90.00
b = 73.736β = 90.00
c = 75.076γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
PHENIXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-10-20 
  • Released Date: 2016-11-09 
  • Deposition Author(s): Bayliss, R., Yeoh, S.

Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC24461/A10285

Revision History 

  • Version 1.0: 2016-11-09
    Type: Initial release
  • Version 1.1: 2016-11-23
    Type: Database references
  • Version 1.2: 2017-05-03
    Type: Database references