3SVV

Crystal Structure of T338C c-Src covalently bound to vinylsulfonamide-pyrazolopyrimidine 9


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.204 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Chemical genetic strategy for targeting protein kinases based on covalent complementarity.

Garske, A.L.Peters, U.Cortesi, A.T.Perez, J.L.Shokat, K.M.

(2011) Proc.Natl.Acad.Sci.USA 108: 15046-15052

  • DOI: 10.1073/pnas.1111239108

  • PubMed Abstract: 
  • The conserved nature of the ATP-binding site of the > 500 human kinases renders the development of specific inhibitors a challenging task. A widely used chemical genetic strategy to overcome the specificity challenge exploits a large-to-small mutatio ...

    The conserved nature of the ATP-binding site of the > 500 human kinases renders the development of specific inhibitors a challenging task. A widely used chemical genetic strategy to overcome the specificity challenge exploits a large-to-small mutation of the gatekeeper residue (a conserved hydrophobic amino acid) and the use of a bulky inhibitor to achieve specificity via shape complementarity. However, in a number of cases, introduction of a glycine or alanine gatekeeper results in diminished kinase activity and ATP affinity. A new chemical genetic approach based on covalent complementarity between an engineered gatekeeper cysteine and an electrophilic inhibitor was developed to address these challenges. This strategy was evaluated with Src, a proto-oncogenic tyrosine kinase known to lose some enzymatic activity using the shape complementarity chemical genetic strategy. We found that Src with a cysteine gatekeeper recapitulates wild type activity and can be irreversibly inhibited both in vitro and in cells. A cocrystal structure of T338C c-Src with a vinylsulfonamide-derivatized pyrazolopyrimidine inhibitor was solved to elucidate the inhibitor binding mode. A panel of electrophilic inhibitors was analyzed against 307 kinases and MOK (MAPK/MAK/MRK overlapping kinase), one of only two human kinases known to have an endogenous cysteine gatekeeper. This analysis revealed remarkably few off-targets, making these compounds the most selective chemical genetic inhibitors reported to date. Protein engineering studies demonstrated that it is possible to increase inhibitor potency through secondary-site mutations. These results suggest that chemical genetic strategies based on covalent complementarity should be widely applicable to the study of protein kinases.


    Organizational Affiliation

    Howard Hughes Medical Institute and Department of Cellular and Molecular Pharmacology, University of California, 600 16th Street, MC 2280, San Francisco, CA 94158, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proto-oncogene tyrosine-protein kinase Src
A, B
286Gallus gallusMutation(s): 1 
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
VSP
Query on VSP

Download SDF File 
Download CCD File 
A, B
N-(3-{[4-amino-1-(propan-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]methyl}phenyl)ethanesulfonamide
C17 H22 N6 O2 S
CZDNNNYBOADUFI-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
VSPIC50: 114 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.204 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.176 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 42.300α = 78.93
b = 63.315β = 87.70
c = 74.230γ = 87.92
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
HKL-2000data scaling
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-17
    Type: Initial release
  • Version 1.1: 2011-10-26
    Type: Database references