3G8K

Crystal structure of murine natural killer cell receptor, Ly49L4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Distinct conformations of Ly49 natural killer cell receptors mediate MHC class I recognition in trans and cis.

Back, J.Malchiodi, E.L.Cho, S.Scarpellino, L.Schneider, P.Kerzic, M.C.Mariuzza, R.A.Held, W.

(2009) Immunity 31: 598-608

  • DOI: 10.1016/j.immuni.2009.07.007
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Certain cell-surface receptors engage ligands expressed on juxtaposed cells and ligands on the same cell. The structural basis for trans versus cis binding is not known. Here, we showed that Ly49 natural killer (NK) cell receptors bound two MHC class ...

    Certain cell-surface receptors engage ligands expressed on juxtaposed cells and ligands on the same cell. The structural basis for trans versus cis binding is not known. Here, we showed that Ly49 natural killer (NK) cell receptors bound two MHC class I (MHC-I) molecules in trans when the two ligand-binding domains were backfolded onto the long stalk region. In contrast, dissociation of the ligand-binding domains from the stalk and their reorientation relative to the NK cell membrane allowed monovalent binding of MHC-I in cis. The distinct conformations (backfolded and extended) define the structural basis for cis-trans binding by Ly49 receptors and explain the divergent functional consequences of cis versus trans interactions. Further analyses identified specific stalk segments that were not required for MHC-I binding in trans but were essential for inhibitory receptor function. These data identify multiple distinct roles of stalk regions for receptor function.


    Organizational Affiliation

    Ludwig Institute for Cancer Research Ltd., Lausanne Branch and University of Lausanne, 1066 Epalinges, Switzerland.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lectin-related NK cell receptor LY49L1
A, B
130Mus musculusMutation(s): 1 
Gene Names: Klra12MOUSE
Find proteins for Q9JIP9 (Mus musculus)
Go to UniProtKB:  Q9JIP9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.226 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.34α = 90
b = 90.11β = 90
c = 90.11γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
MOLREPphasing
REFMACrefinement
d*TREKdata reduction
CrystalCleardata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2009-02-12 
  • Released Date: 2009-11-17 
  • Deposition Author(s): Cho, S.

Revision History 

  • Version 1.0: 2009-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance