3P5E

Structure of the carbohydrate-recognition domain of human Langerin with man4 (Man alpha1-3(Man alpha1-6)Man alpha1-6Man)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7012 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for Langerin Recognition of Diverse Pathogen and Mammalian Glycans through a Single Binding Site.

Feinberg, H.Taylor, M.E.Razi, N.McBride, R.Knirel, Y.A.Graham, S.A.Drickamer, K.Weis, W.I.

(2011) J.Mol.Biol. 405: 1027-1039

  • DOI: 10.1016/j.jmb.2010.11.039
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Langerin mediates the carbohydrate-dependent uptake of pathogens by Langerhans cells in the first step of antigen presentation to the adaptive immune system. Langerin binds to an unusually diverse number of endogenous and pathogenic cell surface carb ...

    Langerin mediates the carbohydrate-dependent uptake of pathogens by Langerhans cells in the first step of antigen presentation to the adaptive immune system. Langerin binds to an unusually diverse number of endogenous and pathogenic cell surface carbohydrates, including mannose-containing O-specific polysaccharides derived from bacterial lipopolysaccharides identified here by probing a microarray of bacterial polysaccharides. Crystal structures of the carbohydrate-recognition domain from human langerin bound to a series of oligomannose compounds, the blood group B antigen, and a fragment of β-glucan reveal binding to mannose, fucose, and glucose residues by Ca(2+) coordination of vicinal hydroxyl groups with similar stereochemistry. Oligomannose compounds bind through a single mannose residue, with no other mannose residues contacting the protein directly. There is no evidence for a second Ca(2+)-independent binding site. Likewise, a β-glucan fragment, Glcβ1-3Glcβ1-3Glc, binds to langerin through the interaction of a single glucose residue with the Ca(2+) site. The fucose moiety of the blood group B trisaccharide Galα1-3(Fucα1-2)Gal also binds to the Ca(2+) site, and selective binding to this glycan compared to other fucose-containing oligosaccharides results from additional favorable interactions of the nonreducing terminal galactose, as well as of the fucose residue. Surprisingly, the equatorial 3-OH group and the axial 4-OH group of the galactose residue in 6SO(4)-Galβ1-4GlcNAc also coordinate Ca(2+), a heretofore unobserved mode of galactose binding in a C-type carbohydrate-recognition domain bearing the Glu-Pro-Asn signature motif characteristic of mannose binding sites. Salt bridges between the sulfate group and two lysine residues appear to compensate for the nonoptimal binding of galactose at this site.


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
C-type lectin domain family 4 member K
A, B, C, D
136Homo sapiensMutation(s): 0 
Gene Names: CD207 (CLEC4K)
Find proteins for Q9UJ71 (Homo sapiens)
Go to Gene View: CD207
Go to UniProtKB:  Q9UJ71
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MAN
Query on MAN

Download SDF File 
Download CCD File 
A, B, C, D
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7012 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.173 
  • Space Group: P 42
Unit Cell:
Length (Å)Angle (°)
a = 79.310α = 90.00
b = 79.310β = 90.00
c = 89.580γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
SCALAdata scaling
PHENIXmodel building
MOSFLMdata reduction
PHENIXrefinement
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance