3C22

Crystal structure of the carbohydrate recognition domain of human Langerin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural studies of langerin and Birbeck granule: a macromolecular organization model

Thepaut, M.Valladeau, J.Nurisso, A.Kahn, R.Arnou, B.Vives, C.Saeland, S.Ebel, C.Monnier, C.Dezutter-Dambuyant, C.Imberty, A.Fieschi, F.

(2009) Biochemistry 48: 2684-2698

  • DOI: 10.1021/bi802151w
  • Primary Citation of Related Structures:  
    3C22

  • PubMed Abstract: 
  • Dendritic cells, a sentinel immunity cell lineage, include different cell subsets that express various C-type lectins. For example, epidermal Langerhans cells express langerin, and some dermal dendritic cells express DC-SIGN. Langerin is a crucial component of Birbeck granules, the Langerhans cell hallmark organelle, and may have a preventive role toward HIV, by its internalization into Birbeck granules ...

    Dendritic cells, a sentinel immunity cell lineage, include different cell subsets that express various C-type lectins. For example, epidermal Langerhans cells express langerin, and some dermal dendritic cells express DC-SIGN. Langerin is a crucial component of Birbeck granules, the Langerhans cell hallmark organelle, and may have a preventive role toward HIV, by its internalization into Birbeck granules. Since langerin carbohydrate recognition domain (CRD) is crucial for HIV interaction and Birbeck granule formation, we produced the CRD of human langerin and solved its structure at 1.5 A resolution. On this basis gp120 high-mannose oligosaccharide binding has been evaluated by molecular modeling. Hydrodynamic studies reveal a very elongated shape of recombinant langerin extracellular domain (ECD). A molecular model of the langerin ECD, integrating the CRD structure, has been generated and validated by comparison with hydrodynamic parameters. In parallel, Langerhans cells were isolated from human skin. From their analysis by electron microscopy and the langerin ECD model, an ultrastructural organization is proposed for Birbeck granules. To delineate the role of the different langerin domains in Birbeck granule formation, we generated truncated and mutated langerin constructs. After transfection into a fibroblastic cell line, we highlighted, in accordance with our model, the role of the CRD in the membrane zipping occurring in BG formation as well as some contribution of the cytoplasmic domain. Finally, we have shown that langerin ECD triggering with a specific mAb promotes global rearrangements of LC morphology. Our results open the way to the definition of a new membrane deformation mechanism.


    Related Citations: 
    • Overproduction, purification and preliminary crystallographic analysis of the carbohydrate-recognition domain of human langerin
      Thepaut, M., Vives, C., Pompidor, G., Kahn, R., Fieschi, F.
      (2008) Acta Crystallogr Sect F Struct Biol Cryst Commun 64: 115

    Organizational Affiliation

    Laboratoire des Proteines Membranaires, CEA, DSV, Institut de Biologie Structurale (IBS), Grenoble, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
C-type lectin domain family 4 member K ABCD156Homo sapiensMutation(s): 0 
Gene Names: CD207CLEC4K
Find proteins for Q9UJ71 (Homo sapiens)
Explore Q9UJ71 
Go to UniProtKB:  Q9UJ71
NIH Common Fund Data Resources
PHAROS:  Q9UJ71
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 
  • Space Group: P 42
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.555α = 90
b = 79.555β = 90
c = 90.144γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
Xnemodata collection
XDSdata reduction
autoSHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2008-01-24 
  • Released Date: 2009-01-27 
  • Deposition Author(s): Thepaut, M.

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance