5ANS

Potent and selective inhibitors of MTH1 probe its role in cancer cell survival


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Potent and Selective Inhibitors of Mth1 Probe its Role in Cancer Cell Survival.

Kettle, J.G.Alwan, H.Bista, M.Breed, J.Davies, N.L.Eckersley, K.Fillery, S.Foote, K.M.Goodwin, L.Jones, D.R.Kack, H.Lau, A.Nissink, J.W.Read, J.Scott, J.S.Taylor, B.Walker, G.Wissler, L.Wylot, M.

(2016) J.Med.Chem. 59: 2346

  • DOI: 10.1021/acs.jmedchem.5b01760
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Recent literature has claimed that inhibition of the enzyme MTH1 can eradicate cancer. MTH1 is one of the "housekeeping" enzymes that are responsible for hydrolyzing damaged nucleotides in cells and thus prevent them from being incorporated into DNA. ...

    Recent literature has claimed that inhibition of the enzyme MTH1 can eradicate cancer. MTH1 is one of the "housekeeping" enzymes that are responsible for hydrolyzing damaged nucleotides in cells and thus prevent them from being incorporated into DNA. We have developed orthogonal and chemically distinct tool compounds to those published in the literature to allow us to test the hypothesis that inhibition of MTH1 has wide applicability in the treatment of cancer. Here we present the work that led to the discovery of three structurally different series of MTH1 inhibitors with excellent potency, selectivity, and proven target engagement in cells. None of these compounds elicited the reported cellular phenotype, and additional siRNA and CRISPR experiments further support these observations. Critically, the difference between the responses of our highly selective inhibitors and published tool compounds suggests that the effect reported for the latter may be due to off-target cytotoxic effects. As a result, we conclude that the role of MTH1 in carcinogenesis and utility of its inhibition is yet to be established.


    Organizational Affiliation

    Oncology Innovative Medicines Unit, AstraZeneca , 35S47 Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
7,8-DIHYDRO-8-OXOGUANINE TRIPHOSPHATASE
A
175Homo sapiensMutation(s): 0 
Gene Names: NUDT1 (MTH1)
EC: 3.6.1.55
Find proteins for P36639 (Homo sapiens)
Go to Gene View: NUDT1
Go to UniProtKB:  P36639
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RX8
Query on RX8

Download SDF File 
Download CCD File 
A
1-[4-amino-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol
R848, Resiquimod
C17 H22 N4 O2
BXNMTOQRYBFHNZ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RX8IC50: 2056 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.205 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 45.327α = 90.00
b = 45.327β = 90.00
c = 151.730γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
MOLREPphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-02
    Type: Initial release
  • Version 1.1: 2016-04-06
    Type: Database references