2MU9

Changing ABRA protein peptide to fit the HLA-DR B1*0301 molecule renders it protection-inducing


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Changing ABRA protein peptide to fit into the HLA-DRbeta1*0301 molecule renders it protection-inducing.

Salazar, L.M.Alba, M.P.Curtidor, H.Bermudez, A.Vargas, L.E.Rivera, Z.J.Patarroyo, M.E.

(2004) Biochem.Biophys.Res.Commun. 322: 119-125

  • DOI: 10.1016/j.bbrc.2004.07.086

  • PubMed Abstract: 
  • The Plasmodium falciparum acidic-basic repeat antigen represents a potential malarial vaccine candidate. One of this protein's high activity binding peptides, named 2150 ((161)KMNMLKENVDYIQKNQNLFK(180)), is conserved, non-immunogenic, and non-protect ...

    The Plasmodium falciparum acidic-basic repeat antigen represents a potential malarial vaccine candidate. One of this protein's high activity binding peptides, named 2150 ((161)KMNMLKENVDYIQKNQNLFK(180)), is conserved, non-immunogenic, and non-protection-inducing. Analogue peptides whose critical binding residues (in bold) were replaced by amino-acids having similar mass but different charge were synthesized and tested to try to modify such immunological properties. These analogues' HLA-DRbeta1* molecule binding ability were also studied in an attempt to explain their biological mechanisms and correlate binding capacity and immunological function with their three-dimensional structure determined by (1)H NMR. A 3(10) distorted helical structure was identified in protective and immunogenic peptide 24922 whilst alpha-helical structure was found for non-immunogenic, non-protective peptides having differences in alpha-helical position. The changes performed on immunogenic, protection-inducing peptide 24922 allowed it to bind specifically to the HLA-DRbeta1*0301 molecule, suggesting that these changes may lead to better interaction with the MHC Class II-peptide-TCR complex rendering it immunogenic and protective, thus suggesting a new way of developing multi-component, sub-unit-based anti-malarial vaccines.


    Organizational Affiliation

    FundaciĆ³n Instituto de Inmunologia de Colombia (FIDIC), Cra 50 No. 26-00, Bogota, Colombia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
P101/acidic basic repeat antigen
A
20Plasmodium falciparumGene Names: ABRA
Find proteins for Q8I5D2 (Plasmodium falciparum)
Go to Gene View: ABRA
Go to UniProtKB:  Q8I5D2
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-16
    Type: Initial release