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 
  • R-Value Observed: 0.202 

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This is version 2.0 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
  • Primary Citation of Related Structures:  
    4ARN

  • 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 and plays a dual role in both development and immunity ...

    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: njg11@cam.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TOLL RECEPTOR, VARIABLE LYMPHOCYTE RECEPTOR B.61 CHIMERAA, B, C, D279Drosophila melanogasterEptatretus burgeri
This entity is chimeric
Mutation(s): 0 
Gene Names: TlVLRB
EC: 3.2.2.6
UniProt
Find proteins for Q4G1L2 (Eptatretus burgeri)
Explore Q4G1L2 
Go to UniProtKB:  Q4G1L2
Find proteins for P08953 (Drosophila melanogaster)
Explore P08953 
Go to UniProtKB:  P08953
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranoseE2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G86851RC
GlyCosmos:  G86851RC
GlyGen:  G86851RC
Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF, H2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-3)][alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseG7N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G19179MO
GlyCosmos:  G19179MO
GlyGen:  G19179MO
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.787α = 90
b = 93.276β = 90
c = 225.342γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALAdata scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-23
    Type: Initial release
  • Version 1.1: 2013-02-27
    Changes: Database references
  • Version 1.2: 2013-05-08
    Changes: Database references
  • Version 1.3: 2017-03-15
    Changes: Source and taxonomy
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary