3MOP

The ternary Death Domain complex of MyD88, IRAK4, and IRAK2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Helical assembly in the MyD88-IRAK4-IRAK2 complex in TLR/IL-1R signalling.

Lin, S.C.Lo, Y.C.Wu, H.

(2010) Nature 465: 885-890

  • DOI: 10.1038/nature09121

  • PubMed Abstract: 
  • MyD88, IRAK4 and IRAK2 are critical signalling mediators of the TLR/IL1-R superfamily. Here we report the crystal structure of the MyD88-IRAK4-IRAK2 death domain (DD) complex, which surprisingly reveals a left-handed helical oligomer that consists of ...

    MyD88, IRAK4 and IRAK2 are critical signalling mediators of the TLR/IL1-R superfamily. Here we report the crystal structure of the MyD88-IRAK4-IRAK2 death domain (DD) complex, which surprisingly reveals a left-handed helical oligomer that consists of 6 MyD88, 4 IRAK4 and 4 IRAK2 DDs. Assembly of this helical signalling tower is hierarchical, in which MyD88 recruits IRAK4 and the MyD88-IRAK4 complex recruits the IRAK4 substrates IRAK2 or the related IRAK1. Formation of these Myddosome complexes brings the kinase domains of IRAKs into proximity for phosphorylation and activation. Composite binding sites are required for recruitment of the individual DDs in the complex, which are confirmed by mutagenesis and previously identified signalling mutations. Specificities in Myddosome formation are dictated by both molecular complementarity and correspondence of surface electrostatics. The MyD88-IRAK4-IRAK2 complex provides a template for Toll signalling in Drosophila and an elegant mechanism for versatile assembly and regulation of DD complexes in signal transduction.


    Organizational Affiliation

    Department of Biochemistry, Weill Cornell Medical College, New York, New York 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myeloid differentiation primary response protein MyD88
A, B, C, D, E, F
110Homo sapiensMutation(s): 0 
Gene Names: MYD88
Find proteins for Q99836 (Homo sapiens)
Go to Gene View: MYD88
Go to UniProtKB:  Q99836
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Interleukin-1 receptor-associated kinase 4
G, H, I, J
113Homo sapiensMutation(s): 0 
Gene Names: IRAK4
EC: 2.7.11.1
Find proteins for Q9NWZ3 (Homo sapiens)
Go to Gene View: IRAK4
Go to UniProtKB:  Q9NWZ3
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Interleukin-1 receptor-associated kinase-like 2
K, L, M, N
111Homo sapiensMutation(s): 1 
Gene Names: IRAK2
Find proteins for O43187 (Homo sapiens)
Go to Gene View: IRAK2
Go to UniProtKB:  O43187
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.216 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 101.709α = 90.00
b = 307.116β = 90.00
c = 187.619γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
ADSCdata collection
RESOLVEphasing
PHENIXrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
SOLVEphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Refinement description