Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Macromolecule Content

• Total Structure Weight: 44575.66 
• Atom Count: 3280 
• 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, Human cytomegalovirus (strain AD169)
• Expression System: Escherichia coli
• Mutation(s): 1 


• 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: 1.6 Å
• R-Value Free: 0.229 
• R-Value Work: 0.185 

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:  
  3GSX, 3GSW, 3GSV, 3GSU, 3GSR, 3GSQ, 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HLA class I histocompatibility antigen, A-2 alpha chain	A	274	Homo sapiens	Mutation(s): 1  Gene Names: HLA-A (HLAA)
Find proteins for P01892 (Homo sapiens) Go to Gene View: HLA-A Go to UniProtKB:  P01892

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Beta-2-microglobulin	B	100	Homo sapiens	Mutation(s): 0  Gene Names: B2M
Find proteins for P61769 (Homo sapiens) Go to Gene View: B2M Go to UniProtKB:  P61769

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
HCMV pp65 fragment 495-503 (NLVPMVATV)	P	9	Human cytomegalovirus (strain AD169)	Mutation(s): 0  Gene Names: UL83
Find proteins for P06725 (Human cytomegalovirus (strain AD169)) Go to UniProtKB:  P06725

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.6 Å
• R-Value Free: 0.229 
• R-Value Work: 0.185 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 53.222	α = 90.00
b = 80.876	β = 112.78
c = 56.522	γ = 90.00

Software Package:

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

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
  Type: Version format compliance