Crystal structure of CDK2 IN complex with Inhibitor CVT-313

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

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This is version 1.2 of the entry. See complete history


Structure of cyclin-dependent kinase 2 (CDK2) in complex with the specific and potent inhibitor CVT-313.

Talapati, S.R.Nataraj, V.Pothuganti, M.Gore, S.Ramachandra, M.Antony, T.More, S.S.Krishnamurthy, N.R.

(2020) Acta Crystallogr F Struct Biol Commun 76: 350-356

  • DOI: https://doi.org/10.1107/S2053230X20009243
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    CVT-313 is a potent CDK2 inhibitor that was identified by screening a purine-analogue library and is currently in preclinical studies. Since this molecule has the potential to be developed as a CDK2 inhibitor for cancer therapy, the potency of CVT-313 to bind and stabilize CDK2 was evaluated, together with its ability to inhibit aberrant cell proliferation. CVT-313 increased the melting temperature of CDK2 by 7°C in thermal stabilization studies, thus indicating its protein-stabilizing effect. CVT-313 inhibited the growth of human lung carcinoma cell line A549 in a dose-dependent manner, with an IC 50 of 1.2 µM, which is in line with the reported biochemical potency of 0.5 µM. To support the further chemical modification of CVT-313 and to improve its biochemical and cellular potency, a crystal structure was elucidated in order to understand the molecular interaction of CVT-313 and CDK2. The crystal structure of CDK2 bound to CVT-313 was determined to a resolution of 1.74 Å and clearly demonstrated that CVT-313 binds in the ATP-binding pocket, interacting with Leu83, Asp86 and Asp145 directly, and the binding was further stabilized by a water-mediated interaction with Asn132. Based on the crystal structure, further modifications of CVT-313 are proposed to provide additional interactions with CDK2 in the active site, which may significantly increase the biochemical and cellular potency of CVT-313.

  • Organizational Affiliation

    Aurigene Discovery Technologies Ltd, 39-40 KIADB Industrial Area, Electronic City Phase II, Hosur Road, Bangalore 560 100, India.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclin-dependent kinase 2299Homo sapiensMutation(s): 0 
Gene Names: CDK2
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
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on AJR

Download Ideal Coordinates CCD File 
B [auth A]2,2'-{[6-{[(4-methoxyphenyl)methyl]amino}-9-(propan-2-yl)-9H-purin-2-yl]azanediyl}di(ethan-1-ol)
C20 H28 N6 O3
Binding Affinity Annotations 
IDSourceBinding Affinity
AJR BindingDB:  6INL IC50: min: 176, max: 500 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.645α = 90
b = 71.994β = 90
c = 72.075γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-30
    Type: Initial release
  • Version 1.1: 2020-08-12
    Changes: Database references, Structure summary
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description