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Mol Biochem Parasitol. 1988 Jan 15;27(2-3):135-41.

Characterization of a 225 kilodalton rhoptry protein of Plasmodium falciparum.

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U.42 INSERM, Villeneuve d'Ascq, France.


A monoclonal antibody (24C6 4F12) raised against Plasmodium falciparum culture supernatant antigens gave a multiple dot picture on schizonts when assayed by immunofluorescence on P. falciparum erythrocytic stages. The corresponding antigen was localized in the peduncle of rhoptries by immunoelectronmicroscopy. On Western blots of P. falciparum schizonts, a major antigen of 225 kDa and a minor one of 240 kDa were recognized by this McAb. Pulse chase analysis of [35S]methionine biosynthetic labeling of P. falciparum culture demonstrated that the 240 kDa molecule was the precursor of the 225 kDa and that its processing occurred between 0 and 4 h after synthesis. Biosynthesis of the 240-225 kDa antigen occurred only during schizogony.

[Indexed for MEDLINE]

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