5J1A

Antigen presenting molecule


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

CD1a on Langerhans cells controls inflammatory skin disease.

Kim, J.H.Hu, Y.Yongqing, T.Kim, J.Hughes, V.A.Le Nours, J.Marquez, E.A.Purcell, A.W.Wan, Q.Sugita, M.Rossjohn, J.Winau, F.

(2016) Nat. Immunol. 17: 1159-1166

  • DOI: 10.1038/ni.3523

  • PubMed Abstract: 
  • CD1a is a lipid-presenting molecule that is abundantly expressed on Langerhans cells. However, the in vivo role of CD1a has remained unclear, principally because CD1a is lacking in mice. Through the use of mice with transgenic expression of CD1a, we ...

    CD1a is a lipid-presenting molecule that is abundantly expressed on Langerhans cells. However, the in vivo role of CD1a has remained unclear, principally because CD1a is lacking in mice. Through the use of mice with transgenic expression of CD1a, we found that the plant-derived lipid urushiol triggered CD1a-dependent skin inflammation driven by CD4(+) helper T cells that produced the cytokines IL-17 and IL-22 (TH17 cells). Human subjects with poison-ivy dermatitis had a similar cytokine signature following CD1a-mediated recognition of urushiol. Among various urushiol congeners, we identified diunsaturated pentadecylcatechol (C15:2) as the dominant antigen for CD1a-restricted T cells. We determined the crystal structure of the CD1a-urushiol (C15:2) complex, demonstrating the molecular basis of urushiol interaction with the antigen-binding cleft of CD1a. In a mouse model and in patients with psoriasis, CD1a amplified inflammatory responses that were mediated by TH17 cells that reacted to self lipid antigens. Treatment with blocking antibodies to CD1a alleviated skin inflammation. Thus, we propose CD1a as a potential therapeutic target in inflammatory skin diseases.


    Organizational Affiliation

    Laboratory of Cell Regulation, Institute for Virus Research, Kyoto University, Kyoto, Japan.,Institute of Infection and Immunity, Cardiff University, School of Medicine, Cardiff, UK.,Infection and Immunity Program &Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T-cell surface glycoprotein CD1a
A
301Homo sapiensMutation(s): 2 
Gene Names: CD1A
Find proteins for P06126 (Homo sapiens)
Go to Gene View: CD1A
Go to UniProtKB:  P06126
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
119Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
6F8
Query on 6F8

Download SDF File 
Download CCD File 
A
3-[(8Z,11Z)-pentadeca-8,11-dien-1-yl]benzene-1,2-diol
C21 H32 O2
RMTXUPIIESNLPW-UTOQUPLUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 42.186α = 90.00
b = 90.321β = 90.00
c = 106.246γ = 90.00
Software Package:
Software NamePurpose
iMOSFLMdata reduction
PHASERphasing
SCALAdata scaling
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2018-04-04
    Type: Data collection, Database references, Derived calculations