2MUG

Protective cellular immunity against P. falciparum malaria merozoite is associated with a different P7 and P8 residue orientation in the MHC-peptide-TCR complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 22 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Protective cellular immunity against P. falciparum malaria merozoites is associated with a different P7 and P8 residue orientation in the MHC-peptide-TCR complex.

Patarroyo, M.E.Salazar, L.M.Cifuentes, G.Lozano, J.M.Delgado, G.Rivera, Z.Rosas, J.Vargas, L.E.

(2006) Biochimie 88: 219-230

  • DOI: https://doi.org/10.1016/j.biochi.2005.07.006
  • Primary Citation of Related Structures:  
    2MUG

  • PubMed Abstract: 

    Developing a logical and rational methodology for obtaining vaccines, especially against the main parasite causing human malaria (P. falciparum), consists of blocking receptor-ligand interactions. Conserved peptides derived from proteins involved in invasion and having high red blood cell binding ability have thus been identified. Immunization studies using Aotus monkeys have revealed that these peptides were neither immunogenic nor protection inducing. When modified in their critical binding residues, previously identified by Glycine scanning, some of these peptides were immunogenic and non-protection inducers; others induced short-lived antibodies whilst a few were both immunogenic and protection inducing. However, very few of these modified high activity binding peptides (HABPs) reproducibly induced protection without inducing antibody production, but with high cytokine liberation, suggesting that cellular mechanisms had been activated in the protection process. The three-dimensional structure of these peptides inducing protection without producing antibodies was determined by 1H-NMR. Their HLA-DRbeta1* molecule binding ability was also determined to ascertain association between their 3D structure and ability to bind to Major Histocompatibility Complex Class-II molecules (MHC-II). 1H Nuclear Magnetic Resonance analysis and structure calculations clearly showed that these modified HABPs inducing protective cellular immune responses (but not producing antibodies against malaria) adopted special structural configuration to fit into the MHC II-peptide-TCR complex. A different orientation for P7 and P8 TCR contacting residues was clearly recognized when comparing their structure with modified peptides, which induced high antibody titers and protection, suggesting that these residues are involved in activating the immune system associated with antibody production and protection.


  • Organizational Affiliation

    Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50 No., 26-00 Bogotá, Colombia; Universidad Nacional de Colombia, Bogotá, Colombia. mepatarr@mail.com


Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine-repeat antigen protein22Plasmodium falciparum FCR-3/GambiaMutation(s): 2 
UniProt
Find proteins for P69192 (Plasmodium falciparum (isolate FCR-3 / Gambia))
Explore P69192 
Go to UniProtKB:  P69192
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69192
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 22 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2023-06-14
    Changes: Data collection, Database references, Derived calculations, Other