3P77

Crystal Structures of the Chicken YF1*7.1 molecule

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.176 

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This is version 1.1 of the entry. See complete history. 


Literature

Structure of a Classical MHC Class I Molecule That Binds "Non-Classical" Ligands.

Hee, C.S., Gao, S., Loll, B., Miller, M.M., Uchanska-Ziegler, B., Daumke, O., Ziegler, A.

(2010) PLoS Biol 8: e1000557-e1000557

  • DOI: 10.1371/journal.pbio.1000557
  • Primary Citation of Related Structures:  
    3P73, 3P77

  • PubMed Abstract: 

    • Chicken YF1 genes share a close sequence relationship with classical MHC class I loci but map outside of the core MHC region. To obtain insights into their function, we determined the structure of the YF1*7.1/β(2)-microgloblin complex by X-ray crysta ...

    Chicken YF1 genes share a close sequence relationship with classical MHC class I loci but map outside of the core MHC region. To obtain insights into their function, we determined the structure of the YF1*7.1/β(2)-microgloblin complex by X-ray crystallography at 1.3 Å resolution. It exhibits the architecture typical of classical MHC class I molecules but possesses a hydrophobic binding groove that contains a non-peptidic ligand. This finding prompted us to reconstitute YF1*7.1 also with various self-lipids. Seven additional YF1*7.1 structures were solved, but only polyethyleneglycol molecules could be modeled into the electron density within the binding groove. However, an assessment of YF1*7.1 by native isoelectric focusing indicated that the molecules were also able to bind nonself-lipids. The ability of YF1*7.1 to interact with hydrophobic ligands is unprecedented among classical MHC class I proteins and might aid the chicken immune system to recognize a diverse ligand repertoire with a minimal number of MHC class I molecules.

    Organizational Affiliation: 

    Institut für Immungenetik, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Freie Universität Berlin, Berlin, Germany.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MHC Rfp-Y class I alpha chainA275Gallus gallusMutation(s): 0 
Gene Names: YFV
Find proteins for Q9BCW3 (Gallus gallus)
Explore Q9BCW3 
Go to UniProtKB:  Q9BCW3
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB99Gallus gallusMutation(s): 0 
Gene Names: B2M
Find proteins for P21611 (Gallus gallus)
Explore P21611 
Go to UniProtKB:  P21611
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.87α = 90
b = 55.04β = 97.04
c = 63.59γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance