4H5S

Complex structure of Necl-2 and CRTAM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 

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This is version 1.1 of the entry. See complete history


Literature

Competition of Cell Adhesion and Immune Recognition: Insights into the Interaction between CRTAM and Nectin-like 2

Zhang, S.Lu, G.Qi, J.Li, Y.Zhang, Z.Zhang, B.Fan, Z.Yan, J.Gao, G.F.

(2013) Structure 21

  • DOI: 10.1016/j.str.2013.06.006
  • Primary Citation of Related Structures:  
    4H5S

  • PubMed Abstract: 
  • Nectin and nectin-like proteins are cell adhesion molecules that mediate the formation of cell adherens junctions by forming homo- or heterodimers. Some members of this protein family can also be used by immune receptors to mediate immune recognition. For instance, nectin-like 2 (Necl-2) is used as a ligand for the immune system by interaction with the immune receptor CRTAM (class-I MHC-restricted T cell associated molecule), which is mainly expressed on the surface of cytotoxic lymphocyte cells ...

    Nectin and nectin-like proteins are cell adhesion molecules that mediate the formation of cell adherens junctions by forming homo- or heterodimers. Some members of this protein family can also be used by immune receptors to mediate immune recognition. For instance, nectin-like 2 (Necl-2) is used as a ligand for the immune system by interaction with the immune receptor CRTAM (class-I MHC-restricted T cell associated molecule), which is mainly expressed on the surface of cytotoxic lymphocyte cells. However, the Necl-2/CRTAM binding mode and its relationship to cell adhesion are not known. Here, we report a Necl-2/CRTAM complex structure, demonstrating that Necl-2 binding to CRTAM competes with the dimerization of CRTAM and possibly Necl-2. Necl-2 occupies the CRTAM homodimer interface, making homodimerization impossible. Mutational and functional analyses identified key amino acids (double "lock-and-key") responsible for the binding. Our work illustrates how the cell adhesion molecule Necl-2 competitively binds the immune receptor CRTAM.


    Organizational Affiliation

    School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytotoxic and regulatory T-cell moleculeA101Homo sapiensMutation(s): 0 
Gene Names: CRTAM
UniProt & NIH Common Fund Data Resources
Find proteins for O95727 (Homo sapiens)
Explore O95727 
Go to UniProtKB:  O95727
PHAROS:  O95727
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cell adhesion molecule 1B101Homo sapiensMutation(s): 0 
Gene Names: CADM1IGSF4IGSF4ANECL2SYNCAMTSLC1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BY67 (Homo sapiens)
Explore Q9BY67 
Go to UniProtKB:  Q9BY67
PHAROS:  Q9BY67
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.042α = 90
b = 91.042β = 90
c = 56.684γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-08-07
    Type: Initial release
  • Version 1.1: 2014-05-07
    Changes: Derived calculations