In vivo determination of the gap2 gene promoter activity in Giardia lamblia

  • YANG Hye-Won (Department of Parasitology and Institute of Tropical Medicine, Brain Korea 21 Project, Yonsei University College of Medicine) ;
  • KIM Juri (Department of Parasitology and Institute of Tropical Medicine, Brain Korea 21 Project, Yonsei University College of Medicine) ;
  • YONG Tai-Soon (Department of Parasitology and Institute of Tropical Medicine, Brain Korea 21 Project, Yonsei University College of Medicine) ;
  • PARK Soon-Jung (Department of Parasitology and Institute of Tropical Medicine, Brain Korea 21 Project, Yonsei University College of Medicine)
  • 발행 : 2006.03.01

초록

A shuttle vector for Escherichia coli and Giardia lamblia was modified to produce a reporter plasmid, which monitors the expression of prescribed gene in G. lamblia by measuring its luciferase activity. Promoter regions of the gap2 gene, one of the genes induced during encystation, were cloned into this plasmid, and the resultant constructs were then transfected into trophozoites of G. lamblia. Transgenic trophozoites containing one of the 3 gap2-luc reporters were induced to encystation, and characterized with respect to gap2 gene expression by measuring their luciferase activities. Giardia containing a gap2-luc fusion of 112-bp upstream region showed full induction of luciferase activity during encystation.

키워드

참고문헌

  1. Kane AV, Ward HD, Keusch GT, Pereira MEA (1991) In vitro encystation of Giardia lamblia: large-scale production of in vitro cysts and strain and clone differences in encystation efficiency. J Parasitol 77: 974-98l https://doi.org/10.2307/3282752
  2. Keister DB (1983) Axenic cultivation of Giardia lamblia in TYI-S-33 medium supplemented with bile. Trans Royal Soc Trop Med Hyg 77: 487-488 https://doi.org/10.1016/0035-9203(83)90120-7
  3. Knodler LA, Svard SG, Silberman JD, Davids BJ, Gillin FD (1999) Developmental gene regulation in Giardia lamblia: first evidence for an encystation-specific promoter and differential 5' mRNA processing. Mol Microbiol 34: 327-340 https://doi.org/10.1046/j.1365-2958.1999.01602.x
  4. Lujan HD, Mowatt MR, Conrad JT, Nash TE (1996) Increased expression of the molecular cheparon BiP /GRP78 during differentiation of a primitive eukaryote. Biol Cell 86: 11-18 https://doi.org/10.1016/0248-4900(96)89519-0
  5. Mowatt MR, Lujan HD, Cotton DB, Boweers B, Yee J, Nash TE, Stibbs HH (1995) Developmentally regulated expression of a Giardia lamblia cyst wall protein gene. Mol Microbiol 15: 955-963 https://doi.org/10.1111/j.1365-2958.1995.tb02364.x
  6. Que X, S.vard SG, Meng T, Hetsko ML, Aley SB, Gillin FD (1996) Developmentally regulated transcripts and evidence of differential mRNA processing in Giardia lamblia. Mol Biochem Parasitol 81: 101-110 https://doi.org/10.1016/0166-6851(96)02698-9
  7. Rozario C, Morin L, Roger AJ, Smith MW, Muller M (1996) Primary structure and phylogenetic relationships of glyeraldehyde-3-phosphate dehydrogenase genes of freeliving and parasitic diplomonad flagellates. J Eukaryot Microbiol 43: 330-340 https://doi.org/10.1111/j.1550-7408.1996.tb03997.x
  8. Singer SM, Yee J, Nash TE (1998) Episomal and integrated maintenance of foreign DNA in Giardia lamblia. Mol Biochem Parasitol 92: 59-69 https://doi.org/10.1016/S0166-6851(97)00225-9
  9. Sun CH, Palm D, McArthur AG, Svard SG, Gillin FD (2002) A novel Myb-related protein involved in transcriptional activation of encystation genes in Giardia lamblia. Mol Microbiol 46: 971-984 https://doi.org/10.1046/j.1365-2958.2002.03233.x
  10. Yang HW, Chung HJ, Yang TS, Lee BH, Park SJ (2003) Identification of an encystation-specific transcription factor, Myb protein in Giardia lamblia. Mol Biochem Parasitol 128: 167-174 https://doi.org/10.1016/S0166-6851(03)00072-0
  11. Yang HW, Yang TS, Lee JH, Park SJ (2002) Characterization of two glyceraldehyde 3-phosphate dehydrogenase genes in Giardia lamblia. Parasitol Res 88: 646-650 https://doi.org/10.1007/s00436-002-0627-2