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2011 | 1-4 |
Tytuł artykułu

Control of mosquito larvae with TMOF and 60 kDa Cry4Aa expressed in Pichia pastoris

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Języki publikacji
EN
Abstrakty
EN
Cry4Aa 678 amino acids fragment (60 kDa) was cloned into Escherichia coli. After induction with IPTG the 60 kDa Cry4Aa fragment was purified by Ni chromatography, separated by SDS PAGE and identified by mass spectrometry (MS/MS). The 60 kDa Cry4Aa fragment exhibited high toxicity towards Ae. aegypti larvae. The earlier results [1] show that Pichia pastoris yeast cells expressing tmfA (synthetic gene coding for the Trypsin Modulating Oostatic Factor of Ae. aegypti) together with E. coli cells expressing Bti toxin genes (cry4Aa, cry11Aa, cyt1Aa and p20) are synergistic. Therefore, P. pastoris, which synthesizes high amounts of heterologous proteins was genetically engineered to produce TMOF and Cry4Aa. Codon-optimized synthetic genes, cry4Aa-tmfA, gst-cry4Aa-tmfA, tmfA and gfptmfA that were expressed by P. pastoris and fed to Ae. aegypti larvae caused 90% mortality. GST (glutathione-S-transferase) enhanced the activity of Cry4Aa-TMOF and protected it from heat denaturation and GFP (Green Fluorescent Protein)- TMOF allowed us to follow yeast cells consumption by individual larva using fluorescent microscopy. This report shows for the first time that 60 kDa Cry4Aa and TMOF expressed together in P. pastoris are highly toxic to Ae. aegypti larvae.
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Czasopismo
Rocznik
Numer
1-4
Opis fizyczny
p.5-15,fig.,ref.
Twórcy
autor
  • University of Florida-IFAS, Florida Medical Entomology Laboratory, 200 9th St SE, Vero Beach Florida, 32962 USA
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autor
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Bibliografia
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Typ dokumentu
Bibliografia
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