5IF1

Crystal structure apo CDK2/cyclin A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Conformational Adaption May Explain the Slow Dissociation Kinetics of Roniciclib (BAY 1000394), a Type I CDK Inhibitor with Kinetic Selectivity for CDK2 and CDK9.

Ayaz, P.Andres, D.Kwiatkowski, D.A.Kolbe, C.C.Lienau, P.Siemeister, G.Lucking, U.Stegmann, C.M.

(2016) Acs Chem.Biol. 11: 1710-1719

  • DOI: 10.1021/acschembio.6b00074
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Roniciclib (BAY 1000394) is a type I pan-CDK (cyclin-dependent kinase) inhibitor which has revealed potent efficacy in xenograft cancer models. Here, we show that roniciclib displays prolonged residence times on CDK2 and CDK9, whereas residence times ...

    Roniciclib (BAY 1000394) is a type I pan-CDK (cyclin-dependent kinase) inhibitor which has revealed potent efficacy in xenograft cancer models. Here, we show that roniciclib displays prolonged residence times on CDK2 and CDK9, whereas residence times on other CDKs are transient, thus giving rise to a kinetic selectivity of roniciclib. Surprisingly, variation of the substituent at the 5-position of the pyrimidine scaffold results in changes of up to 3 orders of magnitude of the drug-target residence time. CDK2 X-ray cocrystal structures have revealed a DFG-loop adaption for the 5-(trifluoromethyl) substituent, while for hydrogen and bromo substituents the DFG loop remains in its characteristic type I inhibitor position. In tumor cells, the prolonged residence times of roniciclib on CDK2 and CDK9 are reflected in a sustained inhibitory effect on retinoblastoma protein (RB) phosphorylation, indicating that the target residence time on CDK2 may contribute to sustained target engagement and antitumor efficacy.


    Organizational Affiliation

    Bayer Pharma AG , Drug Discovery, Lead Discovery Berlin, Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cyclin-dependent kinase 2
A, C
298Homo sapiensMutation(s): 0 
Gene Names: CDK2 (CDKN2)
EC: 2.7.11.22
Find proteins for P24941 (Homo sapiens)
Go to Gene View: CDK2
Go to UniProtKB:  P24941
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cyclin-A2
B, D
265Homo sapiensMutation(s): 0 
Gene Names: CCNA2 (CCN1, CCNA)
Find proteins for P20248 (Homo sapiens)
Go to Gene View: CCNA2
Go to UniProtKB:  P20248
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.187 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 186.574α = 90.00
b = 186.574β = 90.00
c = 213.070γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2016-05-04
    Type: Database references
  • Version 1.2: 2016-06-29
    Type: Database references