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Molecular Cloning of Plasmodium vivax Calcium-Dependent Protein Kinase 4

  • Choi, Kyung-Mi (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Kim, Jung-Yeon (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Moon, Sung-Ung (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Lee, Hyeong-Woo (Department of Pathology, University of Florida) ;
  • Sattabongkot, Jetsumon (Department of Entomology, Armed Forces Research Institute of Medical Science) ;
  • Na, Byoung-Kuk (Department of Parasitology and Institute of Health Sciences, Gyeongsang National University School of Medicine) ;
  • Kim, Dae-Won (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Suh, Eun-Jung (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Kim, Yeon-Joo (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Cho, Shin-Hyeong (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention) ;
  • Lee, Ho-Sa (Institute of Global Environment and Department of Biology, Kyung Hee University) ;
  • Rhie, Ho-Gun (Institute of Global Environment and Department of Biology, Kyung Hee University) ;
  • Kim, Tong-Soo (Division of Malaria and Parasitic Diseases, National Institute of Health, Korea Center for Disease Control and Prevention)
  • 투고 : 2010.07.04
  • 심사 : 2010.11.01
  • 발행 : 2010.12.31

초록

A family of calcium-dependent protein kinases (CDPKs) is a unique enzyme which plays crucial roles in intracellular calcium signaling in plants, algae, and protozoa. CDPKs of malaria parasites are known to be key regulators for stage-specific cellular responses to calcium, a widespread secondary messenger that controls the progression of the parasite. In our study, we identified a gene encoding Plasmodium vivax CDPK4 (PvCDPK4) and characterized its molecular property and cellular localization. PvCDPK4 was a typical CDPK which had well-conserved N-terminal kinase domain and C-terminal calmodulin-like structure with 4-EF hand motifs for calcium-binding. The recombinant protein of EF hand domain of PvCDPK4 was expressed in Echerichia coli and a 34 kDa product was obtained. Immunofluorescence assay by confocal laser microscopy revealed that the protein was expressed at the mature schizont of P. vivax. The expression of PvCDPK4-EF in schizont suggests that it may participate in the proliferation or egress process in the life cycle of this parasite.

키워드

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