| Functional characterization of both MAP kinases of the human malaria parasite Plasmodium falciparum by reverse genetics. | |
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MedLine Citation:
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PMID: 17651389 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The kinome of the human malaria parasite Plasmodium falciparum includes two genes encoding mitogen-activated protein kinase (MAPK) homologues, pfmap-1 and pfmap-2, but no clear orthologue of the MAPK kinase (MAPKK) family, raising the question of the mode of activation and function of the plasmodial MAPKs. Functional studies in the rodent malaria model Plasmodium berghei recently showed the map-2 gene to be dispensable for asexual growth and gametocytogenesis, but essential for male gametogenesis in the mosquito vector. Here, we demonstrate by using a reverse genetics approach that the map-2 gene is essential for completion of the asexual cycle of P. falciparum, an unexpected result in view of the non-essentiality of the orthologous gene for P. berghei erythrocytic schizogony. This validates Pfmap-2 as a potential target for chemotherapeutic intervention. In contrast, the other P. falciparum MAPK, Pfmap-1, is required neither for in vitro schizogony and gametocytogenesis in erythrocytes, nor for gametogenesis and sporogony in the mosquito vector. However, Pfmap-2 protein levels are elevated in pfmap-1(-) parasites, suggesting that Pfmap-1 fulfils an important function in asexual parasites that necessitates compensatory adaptation in parasites lacking this enzyme. |
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Authors:
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Dominique Dorin-Semblat; Neils Quashie; Jean Halbert; Audrey Sicard; Caroline Doerig; Elizabeth Peat; Lisa Ranford-Cartwright; Christian Doerig |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-07-26 |
Journal Detail:
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Title: Molecular microbiology Volume: 65 ISSN: 0950-382X ISO Abbreviation: Mol. Microbiol. Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-08-16 Completed Date: 2008-05-20 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 8712028 Medline TA: Mol Microbiol Country: England |
Other Details:
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Languages: eng Pagination: 1170-80 Citation Subset: IM |
Affiliation:
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INSERM U609, Wellcome Centre for Molecular Parasitology, University of Glasgow, Glasgow, Scotland, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Anopheles gambiae / parasitology Erythrocytes / parasitology Female Humans Isoenzymes / genetics, metabolism* Malaria, Falciparum Male Mitogen-Activated Protein Kinases / genetics, metabolism* Phenotype Plasmodium falciparum / enzymology*, physiology Protozoan Proteins / genetics, metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Isoenzymes; 0/Protozoan Proteins; EC 2.7.11.24/Mitogen-Activated Protein Kinases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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