2NRU

Crystal structure of IRAK-4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of IRAK-4 kinase in complex with inhibitors: a serine/threonine kinase with tyrosine as a gatekeeper.

Wang, Z.Liu, J.Sudom, A.Ayres, M.Li, S.Wesche, H.Powers, J.P.Walker, N.P.C.

(2006) Structure 14: 1835-1844

  • DOI: 10.1016/j.str.2006.11.001
  • Primary Citation of Related Structures:  2NRY

  • PubMed Abstract: 
  • Interleukin-1 (IL-1) receptor-associated kinase-4 (IRAK-4) is a serine/threonine kinase that plays an essential role in signal transduction by Toll/IL-1 receptors (TIRs). Here, we report the crystal structures of the phosphorylated human IRAK-4 kinas ...

    Interleukin-1 (IL-1) receptor-associated kinase-4 (IRAK-4) is a serine/threonine kinase that plays an essential role in signal transduction by Toll/IL-1 receptors (TIRs). Here, we report the crystal structures of the phosphorylated human IRAK-4 kinase domain in complex with a potent inhibitor and with staurosporine to 2.0 and 2.2 A, respectively. The structures reveal that IRAK-4 has a unique tyrosine gatekeeper residue that interacts with the conserved glutamate from helix alphaC. Consequently, helix alphaC is "pulled in" to maintain the active orientation, and the usual pre-existing hydrophobic back pocket of the ATP-binding site is abolished. The peptide substrate-binding site is more open when compared with other protein kinases due to a marked movement of helix alphaG. The pattern of phosphate ligand interactions in the activation loop bears a close resemblance to that of a tyrosine kinase. Our results provide insights into IRAK-4 function and the design of selective inhibitors.


    Organizational Affiliation

    Department of Molecular Structure, Amgen, Inc., 1120 Veterans Boulevard, South San Francisco, California 94080, USA. zwang@amgen.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-1 receptor-associated kinase 4
A, B, C, D
307Homo sapiensGene Names: IRAK4
EC: 2.7.11.1
Find proteins for Q9NWZ3 (Homo sapiens)
Go to Gene View: IRAK4
Go to UniProtKB:  Q9NWZ3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
T12
Query on T12

Download SDF File 
Download CCD File 
A, B, C, D
1-(3-HYDROXYPROPYL)-2-[(3-NITROBENZOYL)AMINO]-1H-BENZIMIDAZOL-5-YL PIVALATE
C22 H24 N4 O6
CEAYRKIZESVQSN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B, C, D
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A, B, C, D
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
T12Ki: 1.2 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.233 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 145.303α = 90.00
b = 141.292β = 125.80
c = 88.423γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-12-12
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance