8JZM

The inhibitor of Toll-like receptor signaling o-vanillin binds covalently to MAL/TIRAP Lys-210


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report


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Literature

o-Vanillin binds covalently to MAL/TIRAP Lys-210 but independently inhibits TLR2.

Rahaman, M.H.Thygesen, S.J.Maxwell, M.J.Kim, H.Mudai, P.Nanson, J.D.Jia, X.Vajjhala, P.R.Hedger, A.Vetter, I.Haselhorst, T.Robertson, A.A.B.Dymock, B.Ve, T.Mobli, M.Stacey, K.J.Kobe, B.

(2024) J Enzyme Inhib Med Chem 39: 2313055-2313055

  • DOI: https://doi.org/10.1080/14756366.2024.2313055
  • Primary Citation of Related Structures:  
    8JZM

  • PubMed Abstract: 

    Toll-like receptor (TLR) innate immunity signalling protects against pathogens, but excessive or prolonged signalling contributes to a range of inflammatory conditions. Structural information on the TLR cytoplasmic TIR (Toll/interleukin-1 receptor) domains and the downstream adaptor proteins can help us develop inhibitors targeting this pathway. The small molecule o-vanillin has previously been reported as an inhibitor of TLR2 signalling. To study its mechanism of action, we tested its binding to the TIR domain of the TLR adaptor MAL/TIRAP (MAL TIR ). We show that o-vanillin binds to MAL TIR and inhibits its higher-order assembly in vitro . Using NMR approaches, we show that o-vanillin forms a covalent bond with lysine 210 of MAL. We confirm in mouse and human cells that o-vanillin inhibits TLR2 but not TLR4 signalling, independently of MAL, suggesting it may covalently modify TLR2 signalling complexes directly. Reactive aldehyde-containing small molecules such as o-vanillin may target multiple proteins in the cell.


  • Organizational Affiliation

    School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Toll/interleukin-1 receptor domain-containing adapter protein146Homo sapiensMutation(s): 0 
Gene Names: TIRAPMAL
UniProt & NIH Common Fund Data Resources
Find proteins for P58753 (Homo sapiens)
Explore P58753 
Go to UniProtKB:  P58753
PHAROS:  P58753
GTEx:  ENSG00000150455 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP58753
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research Council (ARC)AustraliaFL180100109

Revision History  (Full details and data files)

  • Version 1.0: 2024-05-01
    Type: Initial release