8BT2

Notum Inhibitor ARUK3004876


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Designed switch from covalent to non-covalent inhibitors of carboxylesterase Notum activity.

Atkinson, B.N.Willis, N.J.Zhao, Y.Patel, C.Frew, S.Costelloe, K.Magno, L.Svensson, F.Jones, E.Y.Fish, P.V.

(2023) Eur J Med Chem 251: 115132-115132

  • DOI: https://doi.org/10.1016/j.ejmech.2023.115132
  • Primary Citation of Related Structures:  
    8BSP, 8BSQ, 8BSR, 8BSZ, 8BT0, 8BT2, 8BT5, 8BT7, 8BT8, 8BTA, 8BTC, 8BTE, 8BTH, 8BTI

  • PubMed Abstract: 

    N-Acyl indolines 4 are potent, non-covalent Notum inhibitors developed from a covalent virtual screening hit 2a. The lead compounds were simple to synthesise, achieved excellent potency in a biochemical Notum-OPTS assay and restored Wnt signalling in a cell-based TCF/LEF reporter assay. Multiple high resolution X-ray structures established a common binding mode of these inhibitors with the indoline bound centred in the palmiteolate pocket with key interactions being aromatic stacking and a water mediated hydrogen bond to the oxyanion hole. These N-acyl indolines 4 will be useful tools for use in vitro studies to investigate the role of Notum in disease models, especially when paired with a structurally related covalent inhibitor (e.g. 4w and 2a). Overall, this study highlights the designed switch from covalent to non-covalent Notum inhibitors and so illustrates a complementary approach for hit generation and target inhibition.


  • Organizational Affiliation

    Alzheimer's Research UK UCL Drug Discovery Institute, University College London, The Cruciform Building, Gower Street, London, WC1E 6BT, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Palmitoleoyl-protein carboxylesterase NOTUM383Homo sapiensMutation(s): 1 
Gene Names: NOTUMOK/SW-CL.30
EC: 3.1.1.98
UniProt & NIH Common Fund Data Resources
Find proteins for Q6P988 (Homo sapiens)
Explore Q6P988 
Go to UniProtKB:  Q6P988
PHAROS:  Q6P988
GTEx:  ENSG00000185269 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6P988
Glycosylation
Glycosylation Sites: 1Go to GlyGen: Q6P988-1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
RG0 (Subject of Investigation/LOI)
Query on RG0

Download Ideal Coordinates CCD File 
M [auth A]1-[5-chloranyl-4-(trifluoromethyl)-2,3-dihydroindol-1-yl]ethanone
C11 H9 Cl F3 N O
OCTQANMBVHBRLQ-UHFFFAOYSA-N
NAG
Query on NAG

Download Ideal Coordinates CCD File 
B [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A],
N [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
DMS
Query on DMS

Download Ideal Coordinates CCD File 
F [auth A]DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
G [auth A]
H [auth A]
I [auth A]
J [auth A]
K [auth A]
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.036α = 90
b = 71.472β = 90
c = 78.341γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data reduction
xia2data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC375/A17721

Revision History  (Full details and data files)

  • Version 1.0: 2022-12-14
    Type: Initial release
  • Version 1.1: 2023-03-22
    Changes: Refinement description
  • Version 1.2: 2023-06-28
    Changes: Database references