3BEW

10mer Crystal Structure of chicken MHC class I haplotype B21


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.234 

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:  
  • Also Cited By: 2YF6, 2YF5, 2YF1

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Major histocompatibility complex class I glycoprotein haplotype B21
A, D
271Gallus gallusMutation(s): 0 
Gene Names: BFIV21 (B-FIV, BF2)
Find proteins for Q95601 (Gallus gallus)
Go to UniProtKB:  Q95601
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B, E
99Gallus gallusMutation(s): 0 
Gene Names: B2M
Find proteins for P21611 (Gallus gallus)
Go to Gene View: B2M
Go to UniProtKB:  P21611
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
10-mer from Tubulin beta-6 chain
C, F
10Gallus gallusMutation(s): 0 
Find proteins for P09207 (Gallus gallus)
Go to UniProtKB:  P09207
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.234 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 57.393α = 90.00
b = 88.711β = 80.01
c = 100.230γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
REFMACrefinement
ADSCdata collection
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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