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Structure of quaternary complex of human TLR3ECD with three fabs (FORM2)

Analyse Structure of quaternary complex of human TLR3ECD with three fabs (FORM2) in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
3ULV
Type
protein
Length
1,973 residues
Chains
7
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Toll-like receptor 3; FAB15 light chain; FAB15 heavy chain; FAB12 light chain; FAB12…
UniProt
O15455
Ligands
NAG, BMA, MAN, SO4
Pockets
20 · best druggability 0.68

Structure

x-ray diffraction · 7 distinct chains · 5% helix, 38% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AToll-like receptor 3protein66810% helix, 18% strandO15455
LFAB15 light chainprotein2144% helix, 49% strand—
HFAB15 heavy chainprotein2251% helix, 51% strand—
CFAB12 light chainprotein2106% helix, 47% strand—
DFAB12 heavy chainprotein2243% helix, 48% strand—
EFAB1068 light chainprotein2152% helix, 51% strand—
FFAB1068 heavy chainprotein2173% helix, 48% strand—

Ligands and binding sites

  • NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 16 copies · chains A, E
  • BMA · beta-D-mannopyranose · sugar
  • MAN · alpha-D-mannopyranose · sugar
  • SO4 · Sulfate ion · ion · 6 copies · chains A, L, D, E

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 6 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
1690.680.9518empty
27020.650.7463empty
35130.600.7466empty
4870.560.8722empty
54360.560.7354empty

Interfaces

9 interfaces between chains.

  • L–H · 2115 Ų buried · 14 hydrogen bonds · protein-protein
  • E–F · 1901 Ų buried · 11 hydrogen bonds · protein-protein
  • C–D · 1806 Ų buried · 14 hydrogen bonds · protein-protein
  • A–H · 774 Ų buried · 10 hydrogen bonds · protein-protein
  • A–F · 621 Ų buried · 12 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 17 disulfide, 11 glycan (disulfide, N-glycosylation).

Compared structures

  • 3ULV · Structure of quaternary complex of human TLR3ecd with three Fabs (Form2) · the same entry in another collection · chain F against F, TM-score 1.00
  • O15455 · AlphaFold monomer V2.0 prediction for toll-like receptor 3 (O15455) · a predicted model of the same protein · chain A against A, TM-score 0.98

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