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Genetic diversity and selection in three plasmodium vivax merozoite surface protein 7 (pvmsp-7) genes in a colombian population

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Date
2012-09-25
Author
Garzón Ospina, Diego
Lopez, Carolina
Forero Rodriguez, Johanna
Patarroyo, Manuel A.Autoridad Universidad de Rosario
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Citation
URI

http://repository.urosario.edu.co/handle/10336/8831

Abstract
A completely effective vaccine for malaria (one of the major infectious diseases worldwide) is not yet available; different membrane proteins involved in parasite-host interactions have been proposed as candidates for designing it. It has been found that proteins encoded by the merozoite surface protein (msp)-7 multigene family are antibody targets in natural infection; the nucleotide diversity of three Pvmsp-7 genes was thus analyzed in a Colombian parasite population. By contrast with P. falciparum msp-7 loci and ancestral P. vivax msp-7 genes, specie-specific duplicates of the latter specie display high genetic variability, generated by single nucleotide polymorphisms, repeat regions, and recombination. At least three major allele types are present in Pvmsp-7C, Pvmsp-7H and Pvmsp-7I and positive selection seems to be operating on the central region of these msp-7 genes. Although this region has high genetic polymorphism, the C-terminus (Pfam domain ID: PF12948) is conserved and could be an important candidate when designing a subunit-based antimalarial vaccine.

Keyword

CAENORHABDITIS-ELEGANS GENOME ; AMINO-ACID SITES ; MALARIA PARASITE ; POSITIVE SELECTION ; INTRAGENIC RECOMBINATION ; STATISTICAL TESTS ; DEATH EVOLUTION ; MSP7 FAMILY ; FALCIPARUM ; COMPLEX ;

Subject

Enfermedades ;

Source link

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0045962...

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