3Q2C

Binding properties to HLA class I molecules and the structure of the leukocyte Ig-like receptor A3 (LILRA3/ILT6/LIR4/CD85e)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

LILRA3 binds both classical and non-classical HLA class I molecules but with reduced affinities compared to LILRB1/LILRB2: structural evidence

Ryu, M.Chen, Y.Qi, J.Liu, J.Fan, Z.Nam, G.Shi, Y.Cheng, H.Gao, G.F.

(2011) Plos One 6: e19245-e19245

  • DOI: 10.1371/journal.pone.0019245

  • PubMed Abstract: 
  • Structurally, Group 1 LILR (Leukocyte Immunoglobulin (Ig)-Like Receptor, also known as Ig-like transcripts, ILT; Leukocyte Ig-like receptor, LIR; and CD85) members are very similar in terms of the HLAIs (human leukocyte antigen class I molecules) bin ...

    Structurally, Group 1 LILR (Leukocyte Immunoglobulin (Ig)-Like Receptor, also known as Ig-like transcripts, ILT; Leukocyte Ig-like receptor, LIR; and CD85) members are very similar in terms of the HLAIs (human leukocyte antigen class I molecules) binding region and were hypothesized that they all bind to HLAIs. As one of the Group 1 LILRs, LILRA3 is the only secretory LILR and may greatly control the inhibitory immune response induced by LILRB1, LILRB2, and other HLA-binding LILR molecules like LILRA1. Nevertheless, little was known about the binding of LILRA3 to HLAIs. In this report, we present the crystal structure of the LILRA3 domain 1 (D1) and evaluate the D1 and D1D2 (domain 1 and domain 2) binding to classical and non-classical HLAIs using BIAcoreĀ® surface plasmon resonance analysis (SPR). We found that LILRA3 binds both classical HLA-A*0201 and non-classical HLA-G1 but with reduced affinities compared to either LILRB1 or LILRB2. The polymorphic amino acids and the LILRA3 D1 structure support this notion.


    Organizational Affiliation

    CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Leukocyte immunoglobulin-like receptor subfamily A member 3
A
97Homo sapiensMutation(s): 0 
Gene Names: LILRA3 (ILT6, LIR4)
Find proteins for Q8N6C8 (Homo sapiens)
Go to Gene View: LILRA3
Go to UniProtKB:  Q8N6C8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.225 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 83.308α = 90.00
b = 27.817β = 111.65
c = 48.257γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data scaling
CrystalCleardata collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-13
    Type: Initial release