5FOR

Cryptic TIR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Toll/Interleukin-1 Receptor (TIR) Domain of the B-cell Adaptor That Links Phosphoinositide Metabolism with the Negative Regulation of the Toll-like Receptor (TLR) Signalosome.

Halabi, S.Sekine, E.Verstak, B.Gay, N.J.Moncrieffe, M.C.

(2017) J. Biol. Chem. 292: 652-660

  • DOI: 10.1074/jbc.M116.761528

  • PubMed Abstract: 
  • Ligand binding to Toll-like receptors (TLRs) results in dimerization of their cytosolic Toll/interleukin-1 receptor (TIR) domains and recruitment of post-receptor signal transducers into a complex signalosome. TLR activation leads to the production o ...

    Ligand binding to Toll-like receptors (TLRs) results in dimerization of their cytosolic Toll/interleukin-1 receptor (TIR) domains and recruitment of post-receptor signal transducers into a complex signalosome. TLR activation leads to the production of transcription factors and pro-inflammatory molecules and the activation of phosphoinositide 3-kinases (PI3K) in a process that requires the multimodular B-cell adaptor for phosphoinositide 3-kinase (BCAP). BCAP has a sequence previously proposed as a "cryptic" TIR domain. Here, we present the structure of the N-terminal region of human BCAP and show that it possesses a canonical TIR fold. Dimeric BCAP associates with the TIR domains of TLR2/4 and MAL/TIRAP, suggesting that it is recruited to the TLR signalosome by multitypic TIR-TIR interactions. BCAP also interacts with the p85 subunit of PI3K and phospholipase Cγ, enzymes that deplete plasma membrane phosphatidylinositol 4,5-bisphosphate (PIP2), and these interactions provide a molecular explanation for BCAP-mediated down-regulation of inflammatory signaling.


    Organizational Affiliation

    From the Department of Biochemistry, Cambridge University, Cambridge CB2 1GA, United Kingdom.,From the Department of Biochemistry, Cambridge University, Cambridge CB2 1GA, United Kingdom mcm35@cam.ac.uk.,From the Department of Biochemistry, Cambridge University, Cambridge CB2 1GA, United Kingdom njg11@cam.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOSPHOINOSITIDE 3-KINASE ADAPTER PROTEIN 1
A
139Homo sapiensMutation(s): 0 
Gene Names: PIK3AP1 (BCAP)
Find proteins for Q6ZUJ8 (Homo sapiens)
Go to Gene View: PIK3AP1
Go to UniProtKB:  Q6ZUJ8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
I3C
Query on I3C

Download SDF File 
Download CCD File 
A
5-amino-2,4,6-triiodobenzene-1,3-dicarboxylic acid
5-Amino-2,4,6-triiodoisophthalic acid
C8 H4 I3 N O4
JEZJSNULLBSYHV-UHFFFAOYSA-N
 Ligand Interaction
1PE
Query on 1PE

Download SDF File 
Download CCD File 
A
PENTAETHYLENE GLYCOL
PEG400
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MLY
Query on MLY
A
L-PEPTIDE LINKINGC8 H18 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.188 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 135.042α = 90.00
b = 135.042β = 90.00
c = 42.912γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
XDSdata reduction
SHELXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-12-07
    Type: Initial release
  • Version 1.1: 2016-12-14
    Type: Database references
  • Version 1.2: 2017-03-01
    Type: Database references