2B54

Human cyclin dependent kinase 2 (CKD2)complexed with DIN-232305


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Synthesis and biological evaluation of 1-aryl-4,5-dihydro-1h-pyraxolo[3,4-d]pyrimidin-4-one inhibitors of cyclin dependent kinases

Markwalder, J.A.Arnone, M.R.Benfield, P.A.Boisclair, M.Burton, C.R.Chang, C.-C.Cox, S.S.Czerniak, P.M.Dean, C.L.Dolenaik, D.Grafstrom, R.Harrison, B.A.Kaltenbach III, R.F.Nugiel, D.A.Rossi, K.A.Sherk, S.R.Sisk, L.M.Stouten, P.Trainor, G.L.Worland, P.Seitz, S.P.

(2004) J.Med.Chem. 47: 5894-5911

  • DOI: 10.1021/jm020455u

  • PubMed Abstract: 
  • Using a high-throughput screening strategy, a series of 1-aryl-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-4-ones was identified that inhibit the cyclin-dependent kinase (CDK) 4/cyclin D1 complex-mediated phosphorylation of a protein substrate with IC(50 ...

    Using a high-throughput screening strategy, a series of 1-aryl-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-4-ones was identified that inhibit the cyclin-dependent kinase (CDK) 4/cyclin D1 complex-mediated phosphorylation of a protein substrate with IC(50)s in the low micromolar range. On the basis of preliminary structure-activity relationships (SAR), a model was proposed in which these inhibitors occupy the ATP-binding site of the enzyme, forming critical hydrogen bonds to the same residue (Val96) to which the amino group in ATP is presumed to bind. X-ray diffraction studies on a later derivative bound to CDK2 support this binding mode. Iterative cycles of synthesis and screening lead to a novel series of potent, CDK2-selective 6-(arylmethyl)pyrazolopyrimidinones. Placement of a hydrogen-bond donor in the meta-position on the 6-arylmethyl group resulted in approximately 100-fold increases in CDK4 affinity, giving ligands that were equipotent inhibitors of CDK4 and CDK2. These compounds exhibit antiproliferative effects in the NCI HCT116 and other cell lines. The potency of these antiproliferative effects is enhanced in anilide derivatives and translates into tumor growth inhibition in a mouse xenograft model.


    Organizational Affiliation

    Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, New Jersey 08543-4000, USA. jay.markwalder@bms.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell division protein kinase 2
A
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
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
D05
Query on D05

Download SDF File 
Download CCD File 
A
6-(3,4-DIHYDROXYBENZYL)-3-ETHYL-1-(2,4,6-TRICHLOROPHENYL)-1H-PYRAZOLO[3,4-D]PYRIMIDIN-4(5H)-ONE
DIN-232305
C20 H15 Cl3 N4 O3
OPRAIFVPXXVXDL-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
D05IC50: 20 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.158 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.970α = 90.00
b = 73.160β = 90.00
c = 54.260γ = 90.00
Software Package:
Software NamePurpose
PROCESSdata collection
SCALEdata reduction
PROCESSdata reduction
X-PLORphasing
CNXrefinement
X-PLORmodel building
SCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2005-09-27 
  • Released Date: 2005-10-11 
  • Deposition Author(s): Chang, C.-C.

Revision History 

  • Version 1.0: 2005-10-11
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance