5GHV

Crystal structure of an inhibitor-bound Syk


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of spleen tyrosine kinase in complex with novel inhibitors: structural insights for design of anticancer drugs

Lee, S.J.Choi, J.S.Han, B.G.Kim, H.S.Song, H.J.Lee, J.Nam, S.Goh, S.H.Kim, J.H.Koh, J.S.Lee, B.I.

(2016) Febs J. 283: 3613-3625

  • DOI: 10.1111/febs.13831
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Spleen tyrosine kinase (SYK) is a cytosolic nonreceptor protein tyrosine kinase that mediates key signal transduction pathways following the activation of immune cell receptors. SYK regulates cellular events induced by the B-cell receptor and Fc rece ...

    Spleen tyrosine kinase (SYK) is a cytosolic nonreceptor protein tyrosine kinase that mediates key signal transduction pathways following the activation of immune cell receptors. SYK regulates cellular events induced by the B-cell receptor and Fc receptors with high intrinsic activity. Furthermore, SYK has been regarded as an attractive target for the treatment of autoimmune diseases and cancers. Here, we report the crystal structures of SYK in complex with seven newly developed inhibitors (G206, G207, O178, O194, O259, O272, and O282) to provide structural insights into which substituents of the inhibitors and binding regions of SYK are essential for lead compound optimization. Our kinase inhibitors exhibited high inhibitory activities against SYK, with half-maximal inhibitory concentrations (IC50 ) of approximately 0.7-33 nm, but they showed dissimilar inhibitory activities against KDR, RET, JAK2, JAK3, and FLT3. Among the seven SYK inhibitors, O272 and O282 exhibited highly specific inhibitions against SYK, whereas O194 exhibited strong inhibition of both SYK and FLT3. Three inhibitors (G206, G207, and O178) more efficiently inhibited FLT3 while still substantially inhibiting SYK activity. The binding mode analysis suggested that a highly selective SYK inhibitor can be developed by optimizing the functional groups that facilitate direct interactions with Asn499.


    Organizational Affiliation

    Research Institute, National Cancer Center, Goyang, Gyeonggi, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase SYK
A, B
290Homo sapiensMutation(s): 0 
Gene Names: SYK
EC: 2.7.10.2
Find proteins for P43405 (Homo sapiens)
Go to Gene View: SYK
Go to UniProtKB:  P43405
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
X5G
Query on X5G

Download SDF File 
Download CCD File 
A, B
1-({1-[2-({3,5-dimethyl-4-[2-(pyrrolidin-1-yl)ethoxy]phenyl}amino)pyrimidin-4-yl]-4-methyl-1H-pyrrol-3-yl}methyl)azetidin-3-ol
C27 H36 N6 O2
CXYOUSONGUCKEF-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
X5GIC50: 12 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.217 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 40.269α = 89.99
b = 41.501β = 90.01
c = 85.091γ = 98.90
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-07-06
    Type: Initial release
  • Version 1.1: 2016-08-31
    Type: Database references
  • Version 1.2: 2016-10-19
    Type: Database references