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Synthetic peptides for Plasmodium vivax malaria sero-epidemiology. Application of Fmoc-polyamide and displacement chromatography
- Source :
- International journal of peptide and protein research. 37(1)
- Publication Year :
- 1991
-
Abstract
- The immunodominant epitope of Plasmodium vivax, one of the major causative agents of malaria in man, consists of the tandem repetitions of a nonapeptide sequence, AspArgAlaAsp/AlaGlyGlnProAlaGly, with Asp (variant d) or Ala (variant a), in the fourth position. Synthetic peptides corresponding to the P. vivax epitope, containing a different number of nonapeptide sequences, were prepared by solid-phase synthesis according to the Fmoc-polyamide method. Three peptides, containing 1, 2, and 4 copies of the d variant, were assembled on the gel polymer; none of these peptides, however, was suitable for P. vivax sero-epidemiology. A 45-peptide containing both the d and a variants, ddaad, was prepared by continuous-flow Fmoc-polyamide (flow-polyamide). Among the cleavage procedures evaluated for the removal of the five Mtr groups only TFMSA/TFA/ 1,2-ethanedithiol (1:89:10 by vol.) brought deblocking to completion; a substantial level of impurities originated, however, from these procedures. The product was purified by reversed-phase displacement chromatography, a technique only recently applied to peptides, which shows distinct advantages over conventional, linear elution chromatography. In a single experiment, 107 mg of the crude mixture were loaded onto an analytical column (250 × 4 mm), obtaining in purified form 85% of the desired material present in the sample. An ELISA test base on the ddaad peptide was developed and is being applied to the sero-epidemiology of P. vivax malaria.
- Subjects :
- Stereochemistry
Plasmodium vivax
Molecular Sequence Data
Peptide
Antigens, Protozoan
Cleavage (embryo)
Biochemistry
Epitope
Epitopes
Seroepidemiologic Studies
parasitic diseases
medicine
Animals
Humans
Amino Acid Sequence
chemistry.chemical_classification
Oligopeptide
Chromatography
Fluorenes
biology
medicine.diagnostic_test
Reversed-phase chromatography
biology.organism_classification
Displacement chromatography
Malaria
Nylons
chemistry
Immunoassay
Peptides
Subjects
Details
- ISSN :
- 03678377
- Volume :
- 37
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- International journal of peptide and protein research
- Accession number :
- edsair.doi.dedup.....99d0206b4fe600a1ef0bbf6d64aab8f7