3UPR

HLA-B*57:01 complexed to pep-V and Abacavir


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.999 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Drug hypersensitivity caused by alteration of the MHC-presented self-peptide repertoire.

Ostrov, D.A.Grant, B.J.Pompeu, Y.A.Sidney, J.Harndahl, M.Southwood, S.Oseroff, C.Lu, S.Jakoncic, J.de Oliveira, C.A.Yang, L.Mei, H.Shi, L.Shabanowitz, J.English, A.M.Wriston, A.Lucas, A.Phillips, E.Mallal, S.Grey, H.M.Sette, A.Hunt, D.F.Buus, S.Peters, B.

(2012) Proc.Natl.Acad.Sci.USA 109: 9959-9964

  • DOI: 10.1073/pnas.1207934109

  • PubMed Abstract: 
  • Idiosyncratic adverse drug reactions are unpredictable, dose-independent and potentially life threatening; this makes them a major factor contributing to the cost and uncertainty of drug development. Clinical data suggest that many such reactions inv ...

    Idiosyncratic adverse drug reactions are unpredictable, dose-independent and potentially life threatening; this makes them a major factor contributing to the cost and uncertainty of drug development. Clinical data suggest that many such reactions involve immune mechanisms, and genetic association studies have identified strong linkages between drug hypersensitivity reactions to several drugs and specific HLA alleles. One of the strongest such genetic associations found has been for the antiviral drug abacavir, which causes severe adverse reactions exclusively in patients expressing the HLA molecular variant B*57:01. Abacavir adverse reactions were recently shown to be driven by drug-specific activation of cytokine-producing, cytotoxic CD8(+) T cells that required HLA-B*57:01 molecules for their function; however, the mechanism by which abacavir induces this pathologic T-cell response remains unclear. Here we show that abacavir can bind within the F pocket of the peptide-binding groove of HLA-B*57:01, thereby altering its specificity. This provides an explanation for HLA-linked idiosyncratic adverse drug reactions, namely that drugs can alter the repertoire of self-peptides presented to T cells, thus causing the equivalent of an alloreactive T-cell response. Indeed, we identified specific self-peptides that are presented only in the presence of abacavir and that were recognized by T cells of hypersensitive patients. The assays that we have established can be applied to test additional compounds with suspected HLA-linked hypersensitivities in vitro. Where successful, these assays could speed up the discovery and mechanistic understanding of HLA-linked hypersensitivities, and guide the development of safer drugs.


    Organizational Affiliation

    Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, Gainesville, FL 32611, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, B-57 alpha chain
A, C
277Homo sapiensMutation(s): 0 
Gene Names: HLA-B (HLAB)
Find proteins for P18465 (Homo sapiens)
Go to Gene View: HLA-B
Go to UniProtKB:  P18465
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
pep-V
P, Q
9N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B, D
99Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
1KX
Query on 1KX

Download SDF File 
Download CCD File 
A, C
{(1S,4R)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]cyclopent-2-en-1-yl}methanol
Abacavir
C14 H18 N6 O
MCGSCOLBFJQGHM-SCZZXKLOSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.999 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 44.751α = 90.00
b = 131.412β = 104.30
c = 88.340γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
ADSCdata collection
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-13
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Database references