3KB7

Crystal structure of Polo-like kinase 1 in complex with a pyrazoloquinazoline inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Identification of 4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline derivatives as a new class of orally and selective Polo-like kinase 1 inhibitors

Beria, I., Ballinari, D., Bertrand, J.A., Borghi, D., Bossi, R.T., Brasca, M.G., Cappella, P., Caruso, M., Ceccarelli, W., Ciavolella, A., Cristiani, C., Croci, V., De Ponti, A., Fachin, G., Ferguson, R.D., Lansen, J., Moll, J.K., Pesenti, E., Posteri, H., Perego, R., Rocchetti, M., Storici, P., Volpi, D., Valsasina, B.

(2010) J Med Chem 53: 3532-3551

  • DOI: 10.1021/jm901713n
  • Primary Citation of Related Structures:  
    3KB7

  • PubMed Abstract: 

    • Polo-like kinase 1 (Plk1) is a fundamental regulator of mitotic progression whose overexpression is often associated with oncogenesis and therefore is recognized as an attractive therapeutic target in the treatment of proliferative diseases. Here we ...

    Polo-like kinase 1 (Plk1) is a fundamental regulator of mitotic progression whose overexpression is often associated with oncogenesis and therefore is recognized as an attractive therapeutic target in the treatment of proliferative diseases. Here we discuss the structure-activity relationship of the 4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline class of compounds that emerged from a high throughput screening (HTS) campaign as potent inhibitors of Plk1 kinase. Furthermore, we describe the discovery of 49, 8-{[2-methoxy-5-(4-methylpiperazin-1-yl)phenyl]amino}-1-methyl-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxamide, as a highly potent and specific ATP mimetic inhibitor of Plk1 (IC(50) = 0.007 microM) as well as its crystal structure in complex with the methylated Plk1(36-345) construct. Compound 49 was active in cell proliferation against different tumor cell lines with IC(50) values in the submicromolar range and active in vivo in the HCT116 xenograft model where it showed 82% tumor growth inhibition after repeated oral administration.

    Organizational Affiliation: 

    Nerviano Medical Sciences Srl, Oncology, Viale Pasteur 10, 20014 Nerviano, (Mi), Italy. italo.beria@nervianoms.com



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase PLK1A311Homo sapiensMutation(s): 0 
Gene Names: PLK1, PLK
EC: 2.7.11.21
Find proteins for P53350 (Homo sapiens)
Explore P53350 
Go to UniProtKB:  P53350
NIH Common Fund Data Resources
PHAROS  P53350
GTEx  ENSG00000166851
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
071
Query on 071
Download CCD File 
A
8-{[2-methoxy-5-(4-methylpiperazin-1-yl)phenyl]amino}-1-methyl-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxamide
C23 H28 N8 O2
SWTRIZHCIUWGAU-UHFFFAOYSA-N		 Ligand Interaction
TLA
Query on TLA
Download CCD File 
A
L(+)-TARTARIC ACID
C4 H6 O6
FEWJPZIEWOKRBE-JCYAYHJZSA-N		 Ligand Interaction
ZN
Query on ZN
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NMM
Query on NMM		AL-PEPTIDE LINKINGC7 H16 N4 O2ARG
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
071IC50:  7   nM  Binding MOAD
071IC50:  7   nM  BindingDB
71IC50 :  7   nM  PDBBind
071IC50:  10   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.212 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.352α = 90
b = 67.352β = 90
c = 154.109γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
DNAdata collection

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance