6RFI

IRAK4 IN COMPLEX WITH inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Discovery of a Series of 5-Azaquinazolines as Orally Efficacious IRAK4 Inhibitors Targeting MyD88L265PMutant Diffuse Large B Cell Lymphoma.

Degorce, S.L.Anjum, R.Bloecher, A.Carbajo, R.J.Dillman, K.S.Drew, L.Halsall, C.T.Lenz, E.M.Lindsay, N.A.Mayo, M.F.Pink, J.H.Robb, G.R.Rosen, A.Scott, J.S.Xue, Y.

(2019) J Med Chem 62: 9918-9930

  • DOI: https://doi.org/10.1021/acs.jmedchem.9b01346
  • Primary Citation of Related Structures:  
    6RFI, 6RFJ

  • PubMed Abstract: 

    In this article, we report the discovery of a series of 5-azaquinazolines as selective IRAK4 inhibitors. From modestly potent quinazoline 4 , we introduced a 5-aza substitution to mask the 4-NH hydrogen bond donor (HBD). This allowed us to substitute the core with a 2-aminopyrazole, which showed large gains in cellular potency despite the additional formal HBD. Further optimization led to 6-cyanomethyl-5-azaquinazoline 13 , a selective IRAK4 inhibitor, which proved efficacious in combination with ibrutinib, while showing very little activity as a single agent up to 100 mg/kg. This contrasted to previously reported IRAK4 inhibitors that exhibited efficacy in the same model as single agents and was attributed to the enhanced specificity of 13 toward IRAK4.


  • Organizational Affiliation

    Discovery Sciences, R&D , AstraZeneca , Gothenburg SE-431 83 , Mölndal , Sweden.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Interleukin-1 receptor-associated kinase 4
A, B
322Homo sapiensMutation(s): 0 
Gene Names: IRAK4
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NWZ3 (Homo sapiens)
Explore Q9NWZ3 
Go to UniProtKB:  Q9NWZ3
GTEx:  ENSG00000198001 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NWZ3
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChains TypeFormula2D DiagramParent
SEP
Query on SEP
A, B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A, B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Binding Affinity Annotations 
IDSourceBinding Affinity
K1H Binding MOAD:  6RFI IC50: 37 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.904α = 90
b = 116.781β = 90
c = 141.248γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
BUSTERrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-30
    Type: Initial release
  • Version 1.1: 2019-11-27
    Changes: Database references