An essential role for the Plasmodium Nek-2 Nima-related protein kinase in the sexual development of malaria parasites

Luc Reininger, Rita Tewari, Clare Fennell, Zoe Holland, JP Dean Goldring, Lisa Ranford-Cartwright, Oliver Billker, Christian Doerig

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Abstract

The molecular control of cell division and development in malaria parasites is far from understood. We previously showed that a Plasmodium gametocyte-specific NIMA-related protein kinase, nek-4, is required for completion of meiosis in the ookinete, the motile form that develops from the zygote in the mosquito vector. Here, we show that another NIMA-related kinase, Pfnek-2, is also predominantly expressed in gametocytes, and that Pfnek-2 is an active enzyme displaying an in vitro substrate preference distinct from that of Pfnek-4. A functional nek-2 gene is required for transmission of both Plasmodium falciparum and the rodent malaria parasite Plasmodium berghei to the mosquito vector, which is explained by the observation that disruption of the nek-2 gene in P. berghei causes dysregulation of DNA replication during meiosis and blocks ookinete development. This has implications (i) in our understanding of sexual development of malaria parasites and (ii) in the context of control strategies aimed at interfering with malaria transmission.

Original languageEnglish
Pages (from-to)20858-20868
Number of pages11
JournalJournal of Biological Chemistry
Volume284
Issue number31
DOIs
Publication statusPublished - 31 Jul 2009
Externally publishedYes

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