2Y92

Crystal structure of MAL adaptor protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of Toll-Like Receptor Adaptor Mal/Tirap Reveals the Molecular Basis for Signal Transduction and Disease Protection.

Valkov, E.Stamp, A.Dimaio, F.Baker, D.Verstak, B.Roversi, P.Kellie, S.Sweet, M.J.Mansell, A.Gay, N.J.Martin, J.L.Kobe, B.

(2011) Proc.Natl.Acad.Sci.USA 108: 14879

  • DOI: 10.1073/pnas.1104780108

  • PubMed Abstract: 
  • Initiation of the innate immune response requires agonist recognition by pathogen-recognition receptors such as the Toll-like receptors (TLRs). Toll/interleukin-1 receptor (TIR) domain-containing adaptors are critical in orchestrating the signal tran ...

    Initiation of the innate immune response requires agonist recognition by pathogen-recognition receptors such as the Toll-like receptors (TLRs). Toll/interleukin-1 receptor (TIR) domain-containing adaptors are critical in orchestrating the signal transduction pathways after TLR and interleukin-1 receptor activation. Myeloid differentiation primary response gene 88 (MyD88) adaptor-like (MAL)/TIR domain-containing adaptor protein (TIRAP) is involved in bridging MyD88 to TLR2 and TLR4 in response to bacterial infection. Genetic studies have associated a number of unique single-nucleotide polymorphisms in MAL with protection against invasive microbial infection, but a molecular understanding has been hampered by a lack of structural information. The present study describes the crystal structure of MAL TIR domain. Significant structural differences exist in the overall fold of MAL compared with other TIR domain structures: A sequence motif comprising a β-strand in other TIR domains instead corresponds to a long loop, placing the functionally important "BB loop" proline motif in a unique surface position in MAL. The structure suggests possible dimerization and MyD88-interacting interfaces, and we confirm the key interface residues by coimmunoprecipitation using site-directed mutants. Jointly, our results provide a molecular and structural basis for the role of MAL in TLR signaling and disease protection.


    Organizational Affiliation

    School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, QLD 4072, Australia. ev269@cam.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TOLL/INTERLEUKIN-1 RECEPTOR DOMAIN-CONTAINING ADAPTER PROTEIN,
A
145Homo sapiensMutation(s): 0 
Gene Names: TIRAP (MAL)
Find proteins for P58753 (Homo sapiens)
Go to Gene View: TIRAP
Go to UniProtKB:  P58753
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DTT
Query on DTT

Download SDF File 
Download CCD File 
A
2,3-DIHYDROXY-1,4-DITHIOBUTANE
1,4-DITHIOTHREITOL
C4 H10 O2 S2
VHJLVAABSRFDPM-IMJSIDKUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.230 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 88.146α = 90.00
b = 88.146β = 90.00
c = 78.793γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
PHENIXphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-14
    Type: Initial release
  • Version 1.1: 2011-10-19
    Type: Database references