5MWJ

Structure Enabled Discovery of a Stapled Peptide Inhibitor to Target the Oncogenic Transcriptional Repressor TLE1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.04 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure-Enabled Discovery of a Stapled Peptide Inhibitor to Target the Oncogenic Transcriptional Repressor TLE1.

McGrath, S.Tortorici, M.Drouin, L.Solanki, S.Vidler, L.Westwood, I.Gimeson, P.Van Montfort, R.Hoelder, S.

(2017) Chemistry 23: 9577-9584

  • DOI: 10.1002/chem.201700747

  • PubMed Abstract: 
  • TLE1 is an oncogenic transcriptional co-repressor that exerts its repressive effects through binding of transcription factors. Inhibition of this protein-protein interaction represents a putative cancer target, but no small-molecule inhibitors have b ...

    TLE1 is an oncogenic transcriptional co-repressor that exerts its repressive effects through binding of transcription factors. Inhibition of this protein-protein interaction represents a putative cancer target, but no small-molecule inhibitors have been published for this challenging interface. Herein, the structure-enabled design and synthesis of a constrained peptide inhibitor of TLE1 is reported. The design features the introduction of a four-carbon-atom linker into the peptide epitope found in many TLE1 binding partners. A concise synthetic route to a proof-of-concept peptide, cycFWRPW, has been developed. Biophysical testing by isothermal titration calorimetry and thermal shift assays showed that, although the constrained peptide bound potently, it had an approximately five-fold higher K d than that of the unconstrained peptide. The co-crystal structure suggested that the reduced affinity was likely to be due to a small shift of one side chain, relative to the otherwise well-conserved conformation of the acyclic peptide. This work describes a constrained peptide inhibitor that may serve as the basis for improved inhibitors.


    Organizational Affiliation

    Cancer Research (UK) Cancer Therapeutics Unit, Division of Cancer Therapeutics, Division of Structural Biology, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey, SM2 5NG, UK.,Malvern Instruments Nordic AB, Vallongatan 1, Uppsala, 752 28, Sweden.,The Institute of Cancer Research, Division of Cancer Therapeutics Unit, Cancer Research UK Cancer Therapeutics Unit, 15 Cotswold Road, Sutton, Surrey, SM2 5NG, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transducin-like enhancer protein 1
A, B
337Homo sapiensMutation(s): 0 
Gene Names: TLE1
Find proteins for Q04724 (Homo sapiens)
Go to Gene View: TLE1
Go to UniProtKB:  Q04724
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EBU
Query on EBU

Download SDF File 
Download CCD File 
A, B
pepide inhibtor
C46 H56 N10 O6
HTMSDDNRAPLISB-FTROUKIFSA-N
 Ligand Interaction
DMS
Query on DMS

Download SDF File 
Download CCD File 
A
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
EBUKd: 522 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.04 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.188 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 58.940α = 90.00
b = 57.000β = 103.01
c = 104.140γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-04-05
    Type: Initial release
  • Version 1.1: 2017-07-26
    Type: Database references
  • Version 1.2: 2018-10-10
    Type: Data collection, Source and taxonomy, Structure summary
  • Version 1.3: 2018-10-17
    Type: Data collection, Source and taxonomy