3UB3

D96N variant of TIR domain of Mal/TIRAP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural Insights into TIR Domain Specificity of the Bridging Adaptor Mal in TLR4 Signaling

Lin, Z.Lu, J.Zhou, W.Shen, Y.

(2012) Plos One 7: e34202-e34202

  • DOI: 10.1371/journal.pone.0034202
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • MyD88 adaptor-like protein (Mal) is a crucial adaptor that acts as a bridge to recruit the MyD88 molecule to activated TLR4 receptors in response to invading pathogens. The specific assembly of the Toll/interleukin-1 receptor (TIR) domains of TLR4, M ...

    MyD88 adaptor-like protein (Mal) is a crucial adaptor that acts as a bridge to recruit the MyD88 molecule to activated TLR4 receptors in response to invading pathogens. The specific assembly of the Toll/interleukin-1 receptor (TIR) domains of TLR4, Mal and MyD88 is responsible for proper signal transduction in the TLR4 signaling pathway. However, the molecular mechanism for the specificity of these TIR domains remains unclear. Here, we present the crystal structure of the TIR domain of the human Mal molecule (Mal-TIR) at a resolution of 2.4 Å. Unexpectedly, Mal-TIR exhibits an extraordinarily long AB loop, but no αB helix or BB loop, distinguishing it from other TIR domains. More importantly, the Mal-TIR AB loop is capable of mediating direct binding to the TIR domains of TLR4 and MyD88 simultaneously. We also found that Mal-TIR can form a back-to-back dimer that may resemble the dimeric assembly of the entire Mal molecule. Our data demonstrate the bridge role of the Mal-TIR domain and provide important information about TIR domain specificity.


    Organizational Affiliation

    State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Toll/interleukin-1 receptor domain-containing adapter protein
A
146Homo 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: 2.75 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.245 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 86.916α = 90.00
b = 86.916β = 90.00
c = 81.162γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHASESphasing
HKL-2000data reduction
CNSrefinement
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-10-23 
  • Released Date: 2012-05-16 
  • Deposition Author(s): Shen, Y., Lin, Z.

Revision History 

  • Version 1.0: 2012-05-16
    Type: Initial release