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© Thierry Blisnick & Philippe Bastin, Institut Pasteur
Bloodstream Trypanosoma brucei cell
Publication : Molecular and biochemical parasitology

A large multigene family expressed during the erythrocytic schizogony of Plasmodium falciparum

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Molecular and biochemical parasitology - 01 Dec 1994

Carcy B, Bonnefoy S, Guillotte M, Le Scanf C, Grellier P, Schrevel J, Fandeur T, Mercereau-Puijalon O

Link to Pubmed [PMID] – 7739668

Mol. Biochem. Parasitol. 1994 Dec;68(2):221-33

We report the identification of a large multigene family of Plasmodium falciparum using a clone isolated with a polyclonal antiserum raised to a Babesia divergens merozoite protein. The recombinant antigen reacted with human sera collected from individuals exposed to malaria. The deduced protein sequence contains a motif homologous to the consensus sequence of merozoite rhoptry proteins encoded by multigene families in several Babesia species. Antibodies raised to the recombinant protein reacted with a 60-kDa merozoite protein both on B. divergens and on P. falciparum immunoblots. The insert hybridized to a large number of fragments on P. falciparum Southern blots and to most chromosomes of the parasite. Specifically, approx. 3-kb RNAs were detected in 4-16-nucleus schizonts. Ten distinct cDNAs were isolated that differed in the size, position and number of restriction sites in the region homologous to the original genomic clone. With about 140 copies per haploid genome, this is the first large multigene family described in malaria parasites. The existence of a multigene family encoding proteins present in the invasive stage of malaria parasites suggests an important role in invasion and denotes a significant potential for generating diversity.

http://www.ncbi.nlm.nih.gov/pubmed/7739668