Characterisation of two novel proteins from the asexual stage of Plasmodium falciparum, H101 and H103
Publication Year 2005-02, Volume 139, Issue #2, Page 141-151
- Journal Title
- MOLECULAR AND BIOCHEMICAL PARASITOLOGY
- Publication Type
- Journal Article
- The merozoite surface of the pathogenic malaria parasite Plasmodium falciparum is comprised of proteins that are important for the identification and invasion of human red cells. Merozoite surface protein (MSP)3 is a polymorphic protein associated with the surface of merozoites and is also a vaccine candidate. A distinct feature of the MSP3 sequence is three blocks of alanine-rich heptad repeats that are predicted to form an intramolecular coiled-coil. Three orthologues of MSP3 that also contain alanine-rich heptad repeats have been described in P. vivax and we therefore searched the P. falciparum genome database for MSP3 paralogues. We have identified two genes, H101 and H103 related to MSP3, however like another MSP3 paralogue, MSP6, H101 and H103 do not contain heptad repeats. H101 and H103 are expressed during the asexual cycle and immunofluorescence indicates H103 localises to the merozoite surface as a peripheral membrane protein. Transfected parasite lines that express truncated forms of H101 or H103 were viable and grew at the same rate as the parental parasite line. This result may reflect redundancy in function among members of the MSP3/MSP6 gene family as has been described for other families of paralogue genes in P. falciparum. (C) 2004 Elsevier B.V. All rights reserved.
- ELSEVIER SCIENCE BV
- MEROZOITE SURFACE PROTEIN-3; ERYTHROCYTIC STAGES; TOXOPLASMA-GONDII; MALARIA PARASITES; PLASMA-MEMBRANE; ANTIGEN; INVASION; COMPLEX; IDENTIFICATION; RECOMBINATION
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Creation Date: 2005-02-01 12:00:00Last Modified: 0001-01-01 12:00:00