5EHC

Co-crystal structure of eIF4E with nucleotide mimetic inhibitor.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Design of nucleotide-mimetic and non-nucleotide inhibitors of the translation initiation factor eIF4E: Synthesis, structural and functional characterisation.

Soukarieh, F.Nowicki, M.W.Bastide, A.Poyry, T.Jones, C.Dudek, K.Patwardhan, G.Meullenet, F.Oldham, N.J.Walkinshaw, M.D.Willis, A.E.Fischer, P.M.

(2016) Eur.J.Med.Chem. 124: 200-217

  • DOI: 10.1016/j.ejmech.2016.08.047
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Eukaryotic translation initiation factor 4E (eIF4E) is considered as the corner stone in the cap-dependent translation initiation machinery. Its role is to recruit mRNA to the ribosome through recognition of the 5'-terminal mRNA cap structure (m7Gppp ...

    Eukaryotic translation initiation factor 4E (eIF4E) is considered as the corner stone in the cap-dependent translation initiation machinery. Its role is to recruit mRNA to the ribosome through recognition of the 5'-terminal mRNA cap structure (m7GpppN, where G is guanosine, N is any nucleotide). eIF4E is implicated in cell transformation, tumourigenesis, and angiogenesis by facilitating translation of oncogenic mRNAs; it is thus regarded as an attractive anticancer drug target. We have used two approaches to design cap-binding inhibitors of eIF4E by modifying the N7-substituent of m7GMP and replacing the phosphate group with isosteres such as squaramides, sulfonamides, and tetrazoles, as well as by structure-based virtual screening aimed at identifying non-nucleotide cap-binding antagonists. Phosphomimetic nucleotide derivatives and highly ranking virtual hits were evaluated in a series of in vitro and cell-based assays to identify the first non-nucleotide eIF4E cap-binding inhibitor with activities in cell-based assays, N-[(5,6-dihydro-6-oxo-1,3-dioxolo[4,5-g]quinolin-7-yl)methyl]-N'-(2-methyl-propyl)-N-(phenyl-methyl)thiourea (14), including down-regulation of oncogenic proteins and suppression of RNA incorporation into polysomes. Although we did not observe cellular activity with any of our modified m7GMP phosphate isostere compounds, we obtained X-ray crystallography structures of three such compounds in complex with eIF4E, 5'-deoxy-5'-(1,2-dioxo-3-hydroxycyclobut-3-en-4-yl)amino-N7-methyl-guanosine (4a), N7-3-chlorobenzyl-5'-deoxy-5'-(1,2-dioxo-3-hydroxy-cyclobut-3-en-4-yl)amino-guanosine (4f), and N7-benzyl-5'-deoxy-5'-(trifluoromethyl-sulfamoyl)guanosine (7a). Collectively, the data we present on structure-based design of eIF4E cap-binding inhibitors should facilitate the optimisation of such compounds as potential anticancer agents.


    Organizational Affiliation

    School of Pharmacy and Centre for Biomolecular Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic translation initiation factor 4E
A
217Homo sapiensMutation(s): 0 
Gene Names: EIF4E (EIF4EL1, EIF4F)
Find proteins for P06730 (Homo sapiens)
Go to Gene View: EIF4E
Go to UniProtKB:  P06730
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic translation initiation factor 4 gamma 1
B
14Homo sapiensMutation(s): 0 
Gene Names: EIF4G1 (EIF4F, EIF4G, EIF4GI)
Find proteins for Q04637 (Homo sapiens)
Go to Gene View: EIF4G1
Go to UniProtKB:  Q04637
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5NX
Query on 5NX

Download SDF File 
Download CCD File 
A
3-[[(2~{R},3~{S},4~{R},5~{R})-5-[2-azanyl-7-[(3-chlorophenyl)methyl]-6-oxidanylidene-1~{H}-purin-7-ium-9-yl]-3,4-bis(oxidanyl)oxolan-2-yl]methylamino]-4-oxidanyl-cyclobut-3-ene-1,2-dione
C21 H20 Cl N6 O7
IHSJKXMUPLBBMG-PRXMSPFESA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.218 
  • Space Group: P 21 2 21
Unit Cell:
Length (Å)Angle (°)
a = 38.489α = 90.00
b = 52.177β = 90.00
c = 125.698γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
PDB_EXTRACTdata extraction
PHENIXphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
United Kingdom--

Revision History 

  • Version 1.0: 2016-09-07
    Type: Initial release
  • Version 1.1: 2016-09-14
    Type: Database references