6D2T

HLA-B*57:01 presenting LALLTGVRW


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A subset of HLA-I peptides are not genomically templated: Evidence for cis- and trans-spliced peptide ligands.

Faridi, P.Li, C.Ramarathinam, S.H.Vivian, J.P.Illing, P.T.Mifsud, N.A.Ayala, R.Song, J.Gearing, L.J.Hertzog, P.J.Ternette, N.Rossjohn, J.Croft, N.P.Purcell, A.W.

(2018) Sci Immunol 3: --

  • DOI: 10.1126/sciimmunol.aar3947
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The diversity of peptides displayed by class I human leukocyte antigen (HLA) plays an essential role in T cell immunity. The peptide repertoire is extended by various posttranslational modifications, including proteasomal splicing of peptide fragment ...

    The diversity of peptides displayed by class I human leukocyte antigen (HLA) plays an essential role in T cell immunity. The peptide repertoire is extended by various posttranslational modifications, including proteasomal splicing of peptide fragments from distinct regions of an antigen to form nongenomically templated cis-spliced sequences. Previously, it has been suggested that a fraction of the immunopeptidome constitutes such cis-spliced peptides; however, because of computational limitations, it has not been possible to assess whether trans-spliced peptides (i.e., the fusion of peptide segments from distinct antigens) are also bound and presented by HLA molecules, and if so, in what proportion. Here, we have developed and applied a bioinformatic workflow and demonstrated that trans-spliced peptides are presented by HLA-I, and their abundance challenges current models of proteasomal splicing that predict cis-splicing as the most probable outcome. These trans-spliced peptides display canonical HLA-binding sequence features and are as frequently identified as cis-spliced peptides found bound to a number of different HLA-A and HLA-B allotypes. Structural analysis reveals that the junction between spliced peptides is highly solvent exposed and likely to participate in T cell receptor interactions. These results highlight the unanticipated diversity of the immunopeptidome and have important implications for autoimmunity, vaccine design, and immunotherapy.


    Organizational Affiliation

    Institute of Infection and Immunity, Cardiff University School of Medicine,Heath Park, Cardiff CF14 4XN, UK.,Jenner Institute, University of Oxford, Oxford OX3 7FZ, UK.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.,Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia. anthony.purcell@monash.edu nathan.croft@monash.edu.,Monash Centre for Data Science, Faculty of Information Technology, Monash University, Melbourne, Victoria 3800, Australia.,Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research and Department of Molecular and Translational Science, School of Clinical Science, Monash University, Clayton, Victoria 3168, Australia.,Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.,Department of Biology, Institute of Molecular Systems Biology,ETH Zurich, Zurich 8093, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, B-57 alpha chain
A
276Homo sapiensMutation(s): 0 
Gene Names: HLA-B (HLAB)
Find proteins for P01889 (Homo sapiens)
Go to Gene View: HLA-B
Go to UniProtKB:  P01889
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
100Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
LEU-ALA-LEU-LEU-THR-GLY-VAL-ARG-TRP
C
9N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 50.686α = 90.00
b = 82.100β = 90.00
c = 109.842γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-10-03
    Type: Initial release
  • Version 1.1: 2019-04-17
    Type: Data collection, Database references