6CQN

Crystal structure of F5 TCR -DR11-RQ13 peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

CD4+T cell-mediated HLA class II cross-restriction in HIV controllers.

Galperin, M.Farenc, C.Mukhopadhyay, M.Jayasinghe, D.Decroos, A.Benati, D.Tan, L.L.Ciacchi, L.Reid, H.H.Rossjohn, J.Chakrabarti, L.A.Gras, S.

(2018) Sci Immunol 3

  • DOI: 10.1126/sciimmunol.aat0687
  • Primary Citation of Related Structures:  
    6CPL, 6CPN, 6CPO, 6CPH, 6CQL, 6CQN, 6CQQ, 6CQR, 6CQJ

  • PubMed Abstract: 
  • Rare individuals, termed HIV controllers, spontaneously control HIV infection by mounting efficient T cell responses against the virus. Protective CD4 + T cell responses from HIV controllers involve high-affinity public T cell receptors (TCRs) recognizing an immunodominant capsid epitope (Gag293) presented by a remarkably broad array of human leukocyte antigen (HLA) class II molecules ...

    Rare individuals, termed HIV controllers, spontaneously control HIV infection by mounting efficient T cell responses against the virus. Protective CD4 + T cell responses from HIV controllers involve high-affinity public T cell receptors (TCRs) recognizing an immunodominant capsid epitope (Gag293) presented by a remarkably broad array of human leukocyte antigen (HLA) class II molecules. Here, we determine the structures of a prototypical public TCR bound to HLA-DR1, HLA-DR11, and HLA-DR15 molecules presenting the Gag293 epitope. TCR recognition was driven by contacts with the Gag293 epitope, a feature that underpinned the extensive HLA cross-restriction. These high-affinity TCRs promoted mature immunological synapse formation and cytotoxic capacity in both CD4 + and CD8 + T cells. The public TCRs suppressed HIV replication in multiple genetic backgrounds ex vivo, emphasizing the functional advantage conferred by broad HLA class II cross-restriction.


    Organizational Affiliation

    ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class II histocompatibility antigen, DR alpha chainA182Homo sapiensMutation(s): 0 
Gene Names: HLA-DRAHLA-DRA1
Find proteins for P01903 (Homo sapiens)
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Go to UniProtKB:  P01903
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PHAROS:  P01903
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class II histocompatibility antigen, DRB1-11 beta chainB190Homo sapiensMutation(s): 0 
Gene Names: HLA-DRB1
Find proteins for P01911 (Homo sapiens)
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Go to UniProtKB:  P01911
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PHAROS:  P01911
Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Peptide from Capsid protein p24C13HIV-1 M:B_HXB2RMutation(s): 0 
Gene Names: gaggag-pol
EC: 3.4.23.16 (UniProt), 2.7.7.49 (UniProt), 2.7.7.7 (UniProt), 3.1.26.13 (UniProt), 3.1.13.2 (UniProt), 2.7.7 (UniProt), 3.1 (UniProt)
Find proteins for P04585 (Human immunodeficiency virus type 1 group M subtype B (isolate HXB2))
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Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
F5 alpha chainD205Homo sapiensMutation(s): 0 
Gene Names: TRAV24
Find proteins for A0A0B4J272 (Homo sapiens)
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Go to UniProtKB:  A0A0B4J272
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PHAROS:  A0A0B4J272
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
F5 beta chainE245Homo sapiensMutation(s): 0 
Gene Names: TRBC2
Find proteins for A0A0G2JMB4 (Homo sapiens)
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Go to UniProtKB:  A0A0G2JMB4
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.199 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.317α = 90
b = 205.792β = 90
c = 70.229γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-06
    Type: Initial release
  • Version 1.1: 2018-06-27
    Changes: Data collection, Database references, Structure summary
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary