Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

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

Macromolecule Content

• Total Structure Weight: 44.58 kDa 
• Atom Count: 3731 
• Residue Count: 383 
• Unique protein chains: 3

3GSO

Crystal structure of the binary complex between HLA-A2 and HCMV NLV peptide

• DOI: 10.2210/pdb3GSO/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2009-03-27 Released: 2009-08-04 
• Deposition Author(s): Gras, S., Saulquin, X., Reiser, J.-B., Debeaupuis, E., Echasserieau, K., Kissenpfennig, A., Legoux, F., Chouquet, A., Le Gorrec, M., Machillot, P., Neveu, B., Thielens, N., Malissen, B., Bonneville, M., Housset, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.229 
• R-Value Work: 0.185 
• R-Value Observed: 0.188 

Literature

Structural bases for the affinity-driven selection of a public TCR against a dominant human cytomegalovirus epitope.

Gras, S., Saulquin, X., Reiser, J.B., Debeaupuis, E., Echasserieau, K., Kissenpfennig, A., Legoux, F., Chouquet, A., Le Gorrec, M., Machillot, P., Neveu, B., Thielens, N., Malissen, B., Bonneville, M., Housset, D.

(2009) J Immunol 183: 430-437

• PubMed: 19542454 
• DOI: 10.4049/jimmunol.0900556
• Primary Citation of Related Structures:  
  3GSW, 3GSX, 3GSO, 3GSQ, 3GSR, 3GSU, 3GSV, 3GSN


• PubMed Abstract: 
  

Protective T cell responses elicited along chronic human CMV (HCMV) infections are sometimes dominated by CD8 T cell clones bearing highly related or identical public TCR in unrelated individuals. To understand the principles that guide emergence of these public T cell responses, we have performed structural, biophysical, and functional analyses of an immunodominant public TCR (RA14) directed against a major HLA-A*0201-restricted HCMV Ag (pp65(495-503)) and selected in vivo from a diverse repertoire after chronic stimulations. Unlike the two immunodominant public TCRs crystallized so far, which focused on one peptide hotspot, the HCMV-specific RA14 TCR interacts with the full array of available peptide residues. The conservation of some peptide-MHC complex-contacting amino acids by lower-affinity TCRs suggests a shared TCR-peptide-MHC complex docking mode and supports an Ag-driven selection of optimal TCRs. Therefore, the emergence of a public TCR of an oligoclonal Ag-specific response after repeated viral stimulations is based on a receptor displaying a high structural complementarity with the entire peptide and focusing on three peptide hotspots. This highlights key parameters underlying the selection of a protective T cell response against HCMV infection, which remains a major health issue in patients undergoing bone marrow transplantation.

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Organizational Affiliation: 

Institut de Biologie Structurale Jean-Pierre Ebel, CEA, CNRS, UJF, PSB, Grenoble, France.

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): 1  Gene Names: HLA, 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, Beta-2 microglubulin, 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
HCMV pp65 fragment 495-503 (NLVPMVATV)	P	9	N/A	Mutation(s): 0
Find proteins for P06725 (Human cytomegalovirus (strain AD169)) Explore P06725  Go to UniProtKB:  P06725

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.229 
• R-Value Work: 0.185 
• R-Value Observed: 0.188 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.222	α = 90
b = 80.876	β = 112.78
c = 56.522	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
AMoRE	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-03-27 
• Released Date: 2009-08-04 
Deposition Author(s): Gras, S., Saulquin, X., Reiser, J.-B., Debeaupuis, E., Echasserieau, K., Kissenpfennig, A., Legoux, F., Chouquet, A., Le Gorrec, M., Machillot, P., Neveu, B., Thielens, N., Malissen, B., Bonneville, M., Housset, D.

Revision History 

• Version 1.0: 2009-08-04
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance