7S85

Crystal structure of CDK2 liganded with compound WN316

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

  • Deposited: 2021-09-17 Released: 2022-09-28 
  • Deposition Author(s): Sun, L., Schonbrunn, E.
  • Funding Organization(s): National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD), National Institutes of Health/National Cancer Institute (NIH/NCI)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.208 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Screening through Lead Optimization of High Affinity, Allosteric Cyclin-Dependent Kinase 2 (CDK2) Inhibitors as Male Contraceptives That Reduce Sperm Counts in Mice.

Faber, E.B.Wang, N.John, K.Sun, L.Wong, H.L.Burban, D.Francis, R.Tian, D.Hong, K.H.Yang, A.Wang, L.Elsaid, M.Khalid, H.Levinson, N.M.Schonbrunn, E.Hawkinson, J.E.Georg, G.I.

(2023) J Med Chem 66: 1928-1940

  • DOI: https://doi.org/10.1021/acs.jmedchem.2c01731
  • Primary Citation of Related Structures:  
    7RWE, 7RXO, 7S4T, 7S7A, 7S85

  • PubMed Abstract: 

    Although cyclin-dependent kinase 2 (CDK2) is a validated target for both cancer and contraception, developing a CDK2 inhibitor with exquisite selectivity has been challenging due to the structural similarity of the ATP-binding site, where most kinase inhibitors bind. We previously discovered an allosteric pocket in CDK2 with the potential to bind a selective compound and then discovered and structurally confirmed an anthranilic acid scaffold that binds this pocket with high affinity. These allosteric inhibitors are selective for CDK2 over structurally similar CDK1 and show contraceptive potential. Herein, we describe the screening and optimization that led to compounds like EF-4-177 with nanomolar affinity for CDK2. EF-4-177 is metabolically stable, orally bioavailable, and significantly disrupts spermatogenesis, demonstrating this series' therapeutic potential. This work details the discovery of the highest affinity allosteric CDK inhibitors reported and shows promise for this series to yield an efficacious and selective allosteric CDK2 inhibitor.


  • Organizational Affiliation

    Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, University of Minnesota College of Pharmacy─Twin Cities, Minneapolis, Minnesota55414, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclin-dependent kinase 2298Homo sapiensMutation(s): 0 
Gene Names: CDK2CDKN2
EC: 2.7.11.22
UniProt & NIH Common Fund Data Resources
Find proteins for P24941 (Homo sapiens)
Explore P24941 
Go to UniProtKB:  P24941
PHAROS:  P24941
GTEx:  ENSG00000123374 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24941
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
8IQ BindingDB:  7S85 IC50: 940 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.867α = 90
b = 70.509β = 90
c = 72.232γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)United States1R61HD099743-01
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesP30CA076292

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-28
    Type: Initial release
  • Version 1.1: 2023-03-15
    Changes: Database references
  • Version 1.2: 2023-10-25
    Changes: Data collection, Refinement description