1ZIW

Human Toll-like Receptor 3 extracellular domain structure

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

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This is version 2.0 of the entry. See complete history. 


Literature

Crystal structure of human toll-like receptor 3 (TLR3) ectodomain.

Choe, J., Kelker, M.S., Wilson, I.A.

(2005) Science 309: 581-585

  • DOI: 10.1126/science.1115253
  • Primary Citation of Related Structures:  
    1ZIW

  • PubMed Abstract: 

    • Toll-like receptors (TLRs) play key roles in activating immune responses during infection. The human TLR3 ectodomain structure at 2.1 angstroms reveals a large horseshoe-shaped solenoid assembled from 23 leucine-rich repeats (LRRs). Asparagines conserved in the 24-residue LRR motif contribute extensive hydrogen-bonding networks for solenoid stabilization ...

    Toll-like receptors (TLRs) play key roles in activating immune responses during infection. The human TLR3 ectodomain structure at 2.1 angstroms reveals a large horseshoe-shaped solenoid assembled from 23 leucine-rich repeats (LRRs). Asparagines conserved in the 24-residue LRR motif contribute extensive hydrogen-bonding networks for solenoid stabilization. TLR3 is largely masked by carbohydrate, but one face is glycosylation-free, which suggests its potential role in ligand binding and oligomerization. Highly conserved surface residues and a TLR3-specific LRR insertion form a homodimer interface in the crystal, whereas two patches of positively charged residues and a second insertion would provide an appropriate binding site for double-stranded RNA.

    Organizational Affiliation: 

    Department of Molecular Biology and Skaggs Institute for Chemical Biology, Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Toll-like receptor 3A680Homo sapiensMutation(s): 0 
Gene Names: TLR3
UniProt & NIH Common Fund Data Resources
Find proteins for O15455 (Homo sapiens)
Explore O15455 
Go to UniProtKB:  O15455
PHAROS:  O15455
GTEx:  ENSG00000164342 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15455
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseB, C, D, E 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 138.497α = 90
b = 155.121β = 90
c = 119.669γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2005-04-27 
  • Released Date: 2005-06-28 
    • Deposition Author(s): Wilson, I.A., Choe, J.

Revision History  (Full details and data files)

  • Version 1.0: 2005-06-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary