5MZE

Crystal structure of mouse MTH1 with 8-oxo-dGTP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 

Literature

Crystal Structures and Inhibitor Interactions of Mouse and Dog MTH1 Reveal Species-Specific Differences in Affinity.

Narwal, M., Jemth, A.S., Gustafsson, R., Almlof, I., Warpman Berglund, U., Helleday, T., Stenmark, P.

(2018) Biochemistry 57: 593-603

  • DOI: 10.1021/acs.biochem.7b01163
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • MTH1 hydrolyzes oxidized nucleoside triphosphates, thereby sanitizing the nucleotide pool from oxidative damage. This prevents incorporation of damaged nucleotides into DNA, which otherwise would lead to mutations and cell death. The high level of re ...

    MTH1 hydrolyzes oxidized nucleoside triphosphates, thereby sanitizing the nucleotide pool from oxidative damage. This prevents incorporation of damaged nucleotides into DNA, which otherwise would lead to mutations and cell death. The high level of reactive oxygen species in cancer cells leads to a higher level of oxidized nucleotides in cancer cells compared to non-malignant cells making cancer cells more dependent on MTH1 for survival. The possibility to specifically target cancer cells by inhibiting MTH1 has highlighted MTH1 as a promising cancer target. Progression of MTH1 inhibitors into the clinic requires animal studies and knowledge about species differences in potency of inhibitors are of vital importance. We here show that the human MTH1 inhibitor TH588 is approximately twenty fold less potent for inhibition of mouse MTH1 compared to human, rat, pig, and dog MTH1. We present the crystal structures of mouse MTH1 in complex with TH588 and dog MTH1and elucidate the structural and sequence basis for the observed difference in affinity for TH588. We identify amino acid residue 116 in MTH1 as an important determinant for TH588 affinity. Furthermore, we present the structure of mouse MTH1 in complex with the substrate 8-oxo-dGTP. The crystal structures provide insight into the high degree of structural conservation between MTH1 from different organisms and provide a detailed view of interactions between MTH1 and the inhibitor, revealing that minute structural differences can have a large impact on affinity and specificity.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
7,8-dihydro-8-oxoguanine triphosphatase
A, B, C, D
176Mus musculusMutation(s): 0 
Gene Names: Nudt1 (Mth1)
EC: 3.6.1.55
Find proteins for P53368 (Mus musculus)
Go to UniProtKB:  P53368
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download SDF File 
Download CCD File 
B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CU
Query on CU
Download SDF File 
Download CCD File 
A, B, C
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
8DG
Query on 8DG
Download SDF File 
Download CCD File 
A, B, C, D
8-OXO-2'-DEOXYGUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
BUZOGVVQWCXXDP-VPENINKCSA-N
 Ligand Interaction
PEG
Query on PEG
Download SDF File 
Download CCD File 
A, D
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 58.532α = 90.00
b = 139.245β = 107.53
c = 58.718γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
REFMACrefinement
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-10
    Type: Initial release
  • Version 1.1: 2018-01-24
    Type: Database references
  • Version 1.2: 2018-02-14
    Type: Database references
  • Version 1.3: 2018-11-07
    Type: Data collection, Source and taxonomy