4O2P

Kinase domain of cSrc in complex with a substituted pyrazolopyrimidine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Combining X-ray Crystallography and Molecular Modeling toward the Optimization of Pyrazolo[3,4-d]pyrimidines as Potent c-Src Inhibitors Active in Vivo against Neuroblastoma.

Tintori, C.Fallacara, A.L.Radi, M.Zamperini, C.Dreassi, E.Crespan, E.Maga, G.Schenone, S.Musumeci, F.Brullo, C.Richters, A.Gasparrini, F.Angelucci, A.Festuccia, C.Delle Monache, S.Rauh, D.Botta, M.

(2015) J.Med.Chem. 58: 347-361

  • DOI: 10.1021/jm5013159

  • PubMed Abstract: 
  • c-Src is a tyrosine kinase belonging to the Src-family kinases. It is overexpressed and/or hyperactivated in a variety of cancer cells, thus its inhibition has been predicted to have therapeutic effects in solid tumors. Recently, the pyrazolo[3,4-d]p ...

    c-Src is a tyrosine kinase belonging to the Src-family kinases. It is overexpressed and/or hyperactivated in a variety of cancer cells, thus its inhibition has been predicted to have therapeutic effects in solid tumors. Recently, the pyrazolo[3,4-d]pyrimidine 3 was reported as a dual c-Src/Abl inhibitor. Herein we describe a multidisciplinary drug discovery approach for the optimization of the lead 3 against c-Src. Starting from the X-ray crystal structure of c-Src in complex with 3, Monte Carlo free energy perturbation calculations were applied to guide the design of c-Src inhibitors with improved activities. As a result, the introduction of a meta hydroxyl group on the C4 anilino ring was computed to be particularly favorable. The potency of the synthesized inhibitors was increased with respect to the starting lead 3. The best identified compounds were also found active in the inhibition of neuroblastoma cell proliferation. Furthermore, compound 29 also showed in vivo activity in xenograft model using SH-SY5Y cells.


    Organizational Affiliation

    Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena Via Aldo Moro 2, 53100 Siena, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proto-oncogene tyrosine-protein kinase Src
A, B
286Gallus gallusMutation(s): 0 
Gene Names: SRC
EC: 2.7.10.2
Find proteins for P00523 (Gallus gallus)
Go to Gene View: SRC
Go to UniProtKB:  P00523
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
11V
Query on 11V

Download SDF File 
Download CCD File 
A, B
1-[(2R)-2-chloro-2-phenylethyl]-6-{[2-(morpholin-4-yl)ethyl]sulfanyl}-N-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine
C25 H27 Cl N6 O S
VXPRLPJXOGZRAZ-QFIPXVFZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
11VKi: 200 - 240 nM (99) BINDINGDB
11VKi: 200 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.197 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 42.215α = 101.35
b = 63.248β = 90.44
c = 74.813γ = 90.07
Software Package:
Software NamePurpose
XDSdata scaling
REFMACrefinement
PHASERphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-12-17 
  • Released Date: 2015-03-04 
  • Deposition Author(s): Richters, A., Rauh, D.

Revision History 

  • Version 1.0: 2015-03-04
    Type: Initial release