3BEW

10mer Crystal Structure of chicken MHC class I haplotype B21


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of an MHC class I molecule from b21 chickens illustrate promiscuous Peptide binding

Koch, M.Camp, S.Collen, T.Avila, D.Salomonsen, J.Wallny, H.-J.van Hateren, A.Hunt, L.Jacob, J.P.Johnston, F.Marston, D.A.Shaw, I.Dunbar, P.R.Cerundolo, V.Jones, E.Y.Kaufman, J.

(2007) Immunity 27: 885-899

  • DOI: 10.1016/j.immuni.2007.11.007
  • Primary Citation of Related Structures:  
    3BEV, 3BEW

  • PubMed Abstract: 
  • Little is known about the structure of major histocompatibility complex (MHC) molecules outside of mammals. Only one class I molecule in the chicken MHC is highly expressed, leading to strong genetic associations with infectious pathogens. Here, we r ...

    Little is known about the structure of major histocompatibility complex (MHC) molecules outside of mammals. Only one class I molecule in the chicken MHC is highly expressed, leading to strong genetic associations with infectious pathogens. Here, we report two structures of the MHC class I molecule BF2*2101 from the B21 haplotype, which is known to confer resistance to Marek's disease caused by an oncogenic herpesvirus. The binding groove has an unusually large central cavity, which confers substantial conformational flexibility to the crucial residue Arg9, allowing remodeling of key peptide-binding sites. The coupled variation of anchor residues from the peptide, utilizing a charge-transfer system unprecedented in MHC molecules, allows peptides with conspicuously different sequences to be bound. This promiscuous binding extends our understanding of ways in which MHC class I molecules can present peptides to the immune system and might explain the resistance of the B21 haplotype to Marek's disease.


    Organizational Affiliation

    Cancer Research UK Receptor Structure Research Group, The Henry Wellcome Building for Genomic Medicine, Roosevelt Drive, Headington, Oxford OX3 7BN, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Major histocompatibility complex class I glycoprotein haplotype B21AD271Gallus gallusMutation(s): 0 
Gene Names: BFIV21B-FIVBF2
Find proteins for Q95601 (Gallus gallus)
Explore Q95601 
Go to UniProtKB:  Q95601
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinBE99Gallus 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
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
10-mer from Tubulin beta-6 chainCF10N/AMutation(s): 0 
Find proteins for P09207 (Gallus gallus)
Explore P09207 
Go to UniProtKB:  P09207
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.393α = 90
b = 88.711β = 80.01
c = 100.23γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance