4ARN

Crystal structure of the N-terminal domain of Drosophila Toll receptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Functional Insights from the Crystal Structure of the N-Terminal Domain of the Prototypical Toll Receptor.

Gangloff, M.Arnot, C.J.Lewis, M.Gay, N.J.

(2013) Structure 21: 143

  • DOI: 10.1016/j.str.2012.11.003

  • PubMed Abstract: 
  • Drosophila melanogaster Toll is the founding member of an important family of pathogen-recognition receptors in humans, the Toll-like receptor (TLR) family. In contrast, the prototypical receptor is a cytokine-like receptor for Spätzle (Spz) protein ...

    Drosophila melanogaster Toll is the founding member of an important family of pathogen-recognition receptors in humans, the Toll-like receptor (TLR) family. In contrast, the prototypical receptor is a cytokine-like receptor for Spätzle (Spz) protein and plays a dual role in both development and immunity. Here, we present the crystal structure of the N-terminal domain of the receptor that encompasses the first 201 amino acids at 2.4 Å resolution. To our knowledge, the cysteine-rich cap adopts a novel fold unique to Toll-1 orthologs in insects and that is not critical for ligand binding. However, we observed that an antibody directed against the first ten LRRs blocks Spz signaling in a Drosophila cell-based assay. Supplemented by point mutagenesis and deletion analysis, our data suggests that the region up to LRR 14 is involved in Spz binding. Comparison with mammalian TLRs reconciles previous contradictory findings about the mechanism of Toll activation.


    Related Citations: 
    • Liesegang-Like Patterns of Toll Crystals Grown in Gel.
      Gangloff, M.,Moreno, A.,Gay, N.J.
      (2013) J.Appl.Crystallogr. 46: 337


    Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge, CB2 1GA, UK. Electronic address: mg308@cam.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TOLL RECEPTOR, VARIABLE LYMPHOCYTE RECEPTOR B.61 CHIMERA
A, B, C, D
279Drosophila melanogasterEptatretus burgeri
This entity is chimeric
Gene Names: Tl, VLRB
Find proteins for P08953 (Drosophila melanogaster)
Go to UniProtKB:  P08953
Find proteins for Q4G1L2 (Eptatretus burgeri)
Go to UniProtKB:  Q4G1L2
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MLI
Query on MLI

Download SDF File 
Download CCD File 
A, B
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
MAN
Query on MAN

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Download CCD File 
C
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
FUC
Query on FUC

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Download CCD File 
A, C
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
BMA
Query on BMA

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Download CCD File 
C
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B, C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 88.787α = 90.00
b = 93.276β = 90.00
c = 225.342γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHENIXphasing
BUSTERrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-23
    Type: Initial release
  • Version 1.1: 2013-02-27
    Type: Database references
  • Version 1.2: 2013-05-08
    Type: Database references
  • Version 1.3: 2017-03-15
    Type: Source and taxonomy