Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 44.67 kDa 
• Atom Count: 3397 
• Residue Count: 382 
• Unique protein chains: 3

5HHQ

Crystal Structure of HLA-A*0201 in complex with M1-L3W

• DOI: 10.2210/pdb5HHQ/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens, synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2016-01-11 Released: 2016-03-23 
• Deposition Author(s): Gras, S., Josephs, T.M., Rossjohn, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.227 
• R-Value Work: 0.170 
• R-Value Observed: 0.173 

Literature

Molecular basis for universal HLA-A*0201-restricted CD8+ T-cell immunity against influenza viruses.

Valkenburg, S.A., Josephs, T.M., Clemens, E.B., Grant, E.J., Nguyen, T.H., Wang, G.C., Price, D.A., Miller, A., Tong, S.Y., Thomas, P.G., Doherty, P.C., Rossjohn, J., Gras, S., Kedzierska, K.

(2016) Proc Natl Acad Sci U S A 113: 4440-4445

• PubMed: 27036003 
• DOI: 10.1073/pnas.1603106113
• Primary Citation of Related Structures:  
  5HHN, 5HHM, 5HHP, 5HHO, 5HHQ


• PubMed Abstract: 
  

Memory CD8(+)T lymphocytes (CTLs) specific for antigenic peptides derived from internal viral proteins confer broad protection against distinct strains of influenza A virus (IAV). However, immune efficacy can be undermined by the emergence of escape mutants. To determine how T-cell receptor (TCR) composition relates to IAV epitope variability, we used ex vivo peptide-HLA tetramer enrichment and single-cell multiplex analysis to compare TCRs targeted to the largely conserved HLA-A*0201-M158and the hypervariable HLA-B*3501-NP418antigens. The TCRαβs for HLA-B*3501-NP418 (+)CTLs varied among individuals and across IAV strains, indicating that a range of mutated peptides will prime different NP418-specific CTL sets. Conversely, a dominant public TRAV27/TRBV19(+)TCRαβ was selected in HLA-A*0201(+)donors responding to M158 This public TCR cross-recognized naturally occurring M158variants complexed with HLA-A*0201. Ternary structures showed that induced-fit molecular mimicry underpins TRAV27/TRBV19(+)TCR specificity for the WT and mutant M158peptides, suggesting the possibility of universal CTL immunity in HLA-A*0201(+)individuals. Combined with the high population frequency of HLA-A*0201, these data potentially explain the relative conservation of M158 Moreover, our results suggest that vaccination strategies aimed at generating broad protection should incorporate variant peptides to elicit cross-reactive responses against other specificities, especially those that may be relatively infrequent among IAV-primed memory CTLs.

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Organizational Affiliation: 

Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia; [e-mail] [e-mail] [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HLA class I histocompatibility antigen, A-2 alpha chain	A	274	Homo sapiens	Mutation(s): 0  Gene Names: HLA-A, HLAA
Find proteins for P04439 (Homo sapiens) Explore P04439  Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439 GTEx  ENSG00000206503

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B	100	Homo sapiens	Mutation(s): 0  Gene Names: B2M, CDABP0092, HDCMA22P
Find proteins for P61769 (Homo sapiens) Explore P61769  Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769 GTEx  ENSG00000166710

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
M1-L3W, GIWGFVFTL	C	9	synthetic construct	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.227 
• R-Value Work: 0.170 
• R-Value Observed: 0.173 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.651	α = 90
b = 80.153	β = 114.42
c = 57.608	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2016-01-11 
• Released Date: 2016-03-23 
Deposition Author(s): Gras, S., Josephs, T.M., Rossjohn, J.

Revision History 

• Version 1.0: 2016-03-23
  Type: Initial release
  
• Version 1.1: 2016-03-30
  Changes: Database references
• Version 1.2: 2016-04-13
  Changes: Database references
• Version 1.3: 2016-05-04
  Changes: Database references