6CQL | pdb_00006cql

Crystal structure of F24 TCR -DR11-RQ13 peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 
    0.256 (Depositor), 0.270 (DCC) 
  • R-Value Work: 
    0.220 (Depositor), 0.230 (DCC) 
  • R-Value Observed: 
    0.222 (Depositor) 

Starting Models: experimental
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Ligand Structure Quality Assessment 

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This is version 1.5 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: https://doi.org/10.1126/sciimmunol.aat0687
  • Primary Citation of Related Structures:  
    6CPH, 6CPL, 6CPN, 6CPO, 6CQJ, 6CQL, 6CQN, 6CQQ, 6CQR

  • 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. 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

    Pasteur Institute, Viral Pathogenesis Unit, Paris, France.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HLA class II histocompatibility antigen, DR alpha chain182Homo sapiensMutation(s): 0 
Gene Names: HLA-DRAHLA-DRA1
UniProt & NIH Common Fund Data Resources
Find proteins for P01903 (Homo sapiens)
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Go to UniProtKB:  P01903
PHAROS:  P01903
GTEx:  ENSG00000204287 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01903
Glycosylation
Glycosylation Sites: 2Go to GlyGen: P01903-1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
HLA class II histocompatibility antigen, DRB1-11 beta chain190Homo sapiensMutation(s): 0 
Gene Names: HLA-DRB1
UniProt & NIH Common Fund Data Resources
Find proteins for P01911 (Homo sapiens)
Explore P01911 
Go to UniProtKB:  P01911
PHAROS:  P01911
GTEx:  ENSG00000196126 
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UniProt GroupP01911
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Peptide from Capsid protein p2413HIV-1 M:B_HXB2RMutation(s): 0 
UniProt
Find proteins for P04585 (Human immunodeficiency virus type 1 group M subtype B (isolate HXB2))
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Go to UniProtKB:  P04585
Entity Groups  
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UniProt GroupP04585
Sequence Annotations
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
F24 alpha chain205Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for A0A0B4J272 (Homo sapiens)
Explore A0A0B4J272 
Go to UniProtKB:  A0A0B4J272
PHAROS:  A0A0B4J272
GTEx:  ENSG00000211805 
Entity Groups  
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UniProt GroupA0A0B4J272
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
F24 beta Chain245Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for A0A5B9 (Homo sapiens)
Explore A0A5B9 
Go to UniProtKB:  A0A5B9
PHAROS:  A0A5B9
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UniProt GroupA0A5B9
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free:  0.256 (Depositor), 0.270 (DCC) 
  • R-Value Work:  0.220 (Depositor), 0.230 (DCC) 
  • R-Value Observed: 0.222 (Depositor) 
Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.531α = 90
b = 205.402β = 90
c = 69.516γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted NAGClick on this verticalbar to view details

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-06
    Type: Initial release
  • Version 1.1: 2018-06-20
    Changes: Data collection, Derived calculations
  • Version 1.2: 2018-06-27
    Changes: Data collection, Database references, Structure summary
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.4: 2023-10-04
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 1.5: 2024-11-20
    Changes: Structure summary