1X7Q

Crystal structure of HLA-A*1101 with sars nucleocapsid peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.135 

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This is version 1.2 of the entry. See complete history. 


Literature

High-resolution structure of HLA-A*1101 in complex with SARS nucleocapsid peptide.

Blicher, T., Kastrup, J.S., Buus, S., Gajhede, M.

(2005) Acta Crystallogr D Biol Crystallogr 61: 1031-1040

  • DOI: 10.1107/S0907444905013090
  • Primary Citation of Related Structures:  
    1X7Q

  • PubMed Abstract: 

    • The structure of the human MHC-I molecule HLA-A*1101 in complex with a nonameric peptide (KTFPPTEPK) has been determined by X-ray crystallography to 1.45 A resolution. The peptide is derived from the SARS-CoV nucleocapsid protein positions 362-370 (SNP362-370) ...

    The structure of the human MHC-I molecule HLA-A*1101 in complex with a nonameric peptide (KTFPPTEPK) has been determined by X-ray crystallography to 1.45 A resolution. The peptide is derived from the SARS-CoV nucleocapsid protein positions 362-370 (SNP362-370). It is conserved in all known isolates of SARS-CoV and has been verified by in vitro peptide-binding studies to be a good to intermediate binder to HLA-A*0301 and HLA-A*1101, with IC50 values of 70 and 186 nM, respectively [Sylvester-Hvid et al. (2004), Tissue Antigens, 63, 395-400]. In terms of the residues lining the peptide-binding groove, the HLA-A*1101-SNP362-370 complex is very similar to other known structures of HLA-A*1101 and HLA-A*6801. The SNP362-370 peptide is held in place by 17 hydrogen bonds to the alpha-chain residues and by nine water molecules which are also tightly bound in the peptide-binding groove. Thr6 of the peptide (Thr6p) does not make efficient use of the middle (E) pocket. For vaccine development, there seems to be a potential for optimization targeted at this position. All residues except Thr2p and Lys9p are accessible for T-cell recognition.

    Organizational Affiliation: 

    Biostructural Research, Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, DK-2100 Copenhagen, Denmark.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-11 alpha chainA275Homo sapiensMutation(s): 0 
Gene Names: HLA-A, HLAA
UniProt & NIH Common Fund Data Resources
Find proteins for P04439 (Homo sapiens)
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Go to UniProtKB:  P04439
PHAROS:  P04439
GTEx:  ENSG00000206503 
Entity Groups  
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UniProt GroupP04439
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB99Homo sapiensMutation(s): 0 
Gene Names: B2M, CDABP0092, HDCMA22P
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
PHAROS:  P61769
GTEx:  ENSG00000166710 
Entity Groups  
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UniProt GroupP61769
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
SARS NUCLEOCAPSID PEPTIDEC9N/AMutation(s): 0 
UniProt
Find proteins for P59595 (Severe acute respiratory syndrome coronavirus)
Explore P59595 
Go to UniProtKB:  P59595
Entity Groups  
UniProt GroupP59595
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.135 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.465α = 90
b = 80.623β = 116.79
c = 56.57γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
SHELXL-97refinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-08-02
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance