2DYP

Crystal Structure of LILRB2(LIR2/ILT4/CD85d) complexed with HLA-G

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.233 

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This is version 1.2 of the entry. See complete history. 


Literature

Structural basis for recognition of the nonclassical MHC molecule HLA-G by the leukocyte Ig-like receptor B2 (LILRB2/LIR2/ILT4/CD85d)

Shiroishi, M., Kuroki, K., Rasubala, L., Tsumoto, K., Kumagai, I., Kurimoto, E., Kato, K., Kohda, D., Maenaka, K.

(2006) Proc Natl Acad Sci U S A 103: 16412-16417

  • DOI: 10.1073/pnas.0605228103
  • Primary Citation of Related Structures:  
    2DYP

  • PubMed Abstract: 

    • HLA-G is a nonclassical MHC class I (MHCI) molecule that can suppress a wide range of immune responses in the maternal-fetal interface. The human inhibitory immune receptors leukocyte Ig-like receptor (LILR) B1 [also called LIR1, Ig-like transcript 2 (ILT2), or CD85j] and LILRB2 (LIR2/ILT4/CD85d) preferentially recognize HLA-G ...

    HLA-G is a nonclassical MHC class I (MHCI) molecule that can suppress a wide range of immune responses in the maternal-fetal interface. The human inhibitory immune receptors leukocyte Ig-like receptor (LILR) B1 [also called LIR1, Ig-like transcript 2 (ILT2), or CD85j] and LILRB2 (LIR2/ILT4/CD85d) preferentially recognize HLA-G. HLA-G inherently exhibits various forms, including beta(2)-microglobulin (beta(2)m)-free and disulfide-linked dimer forms. Notably, LILRB1 cannot recognize the beta(2)m-free form of HLA-G or HLA-B27, but LILRB2 can recognize the beta(2)m-free form of HLA-B27. To date, the structural basis for HLA-G/LILR recognition remains to be examined. Here, we report the 2.5-A resolution crystal structure of the LILRB2/HLA-G complex. LILRB2 exhibits an overlapping but distinct MHCI recognition mode compared with LILRB1 and dominantly recognizes the hydrophobic site of the HLA-G alpha3 domain. NMR binding studies also confirmed these LILR recognition differences on both conformed (heavy chain/peptide/beta(2)m) and free forms of beta(2)m. Binding studies using beta(2)m-free MHCIs revealed differential beta(2)m-dependent LILR-binding specificities. These results suggest that subtle structural differences between LILRB family members cause the distinct binding specificities to various forms of HLA-G and other MHCIs, which may in turn regulate immune suppression.

    Organizational Affiliation: 

    Division of Structural Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, alpha chain GA277Homo sapiensMutation(s): 1 
Gene Names: HLA-G, HLA-6.0, HLAG
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Find proteins for P17693 (Homo sapiens)
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PHAROS:  P17693
GTEx:  ENSG00000204632
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB100Homo sapiensMutation(s): 0 
Gene Names: B2M, CDABP0092, HDCMA22P
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Find proteins for P61769 (Homo sapiens)
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PHAROS:  P61769
GTEx:  ENSG00000166710
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
9 Mer Peptide From Histone H2A.xC9N/AMutation(s): 0 
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Find proteins for P16104 (Homo sapiens)
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GTEx:  ENSG00000188486
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Leukocyte immunoglobulin-like receptor subfamily B member 2D196Homo sapiensMutation(s): 0 
Gene Names: LILRB2, ILT4, LIR2, MIR10
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PHAROS:  Q8N423
GTEx:  ENSG00000131042
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.233 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.4α = 90
b = 81.4β = 90
c = 186.733γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
AMoREphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-11-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance