5F1I

MHC with 9-mer peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Diversified Anchoring Features the Peptide Presentation of DLA-88*50801: First Structural Insight into Domestic Dog MHC Class I

Xiao, J.Xiang, W.Chai, Y.Haywood, J.Qi, J.Ba, L.Qi, P.Wang, M.Liu, J.Gao, G.F.

(2016) J Immunol 197: 2306-2315

  • DOI: https://doi.org/10.4049/jimmunol.1600887
  • Primary Citation of Related Structures:  
    5F1I, 5F1N

  • PubMed Abstract: 

    Canines represent a crucial animal model for studying human diseases and organ transplantation, as well as the evolution of domestic animals. MHCs, with a central role in cellular immunity, are commonly used in the study of dog population genetics and genome evolution. However, the molecular basis for the peptide presentation of dog MHC remains largely unknown. In this study, peptide presentation by canine MHC class I DLA-88*50801 was structurally determined, revealing diversified anchoring modes of the binding peptides. Flexible and large pockets composed of both hydrophobic and hydrophilic residues can accommodate pathogen-derived peptides with diverse anchor residues, as confirmed by thermostability measurements. Furthermore, DLA-88*50801 contains an unusual α2 helix with a large coil in the TCR contact region. These results further our understanding of canine T cell immunity through peptide presentation of MHC class I and shed light on the molecular basis for vaccine development for canine infectious diseases, for example, canine distemper virus.


  • Organizational Affiliation

    Key Laboratory of Veterinary Bioproduction and Chemical Medicine of the Ministry of Agriculture, Zhongmu Institutes of China Animal Husbandry Industry Co. Ltd, Beijing 100095, China; College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; China Research Network of Immunity and Health, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China;


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MHC class I DLA-88
A, D, G, J, M
A, D, G, J, M, P, S, V
275Canis lupus familiarisMutation(s): 0 
UniProt
Find proteins for J9UGS3 (Canis lupus familiaris)
Explore J9UGS3 
Go to UniProtKB:  J9UGS3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ9UGS3
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Beta2M
B, E, H, K, N
B, E, H, K, N, Q, T, W
99Canis lupus familiarisMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
PHAROS:  P61769
GTEx:  ENSG00000166710 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61769
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
9-mer peptide
C, F, I, L, O
C, F, I, L, O, R, U, X
9Canis lupus familiarisMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.101α = 84.6
b = 94.626β = 72.79
c = 124.355γ = 81.61
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASESphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-11-30
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Refinement description