ArticleMolecular biotechnology2013
Cloning, characterization, and expression of a new cry1Ab gene from DOR Bt-1, an indigenous isolate of Bacillus thuringiensis.
Article in Molecular biotechnology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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6 authors.
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Abstract
A new cry1Ab gene was cloned from the promising local isolate, DOR Bt-1, a Bacillus thuringiensis strain isolated from castor semilooper (Achaea janata L.) cadavers from castor bean (Ricinus communis L.) field. The nucleotide sequence of the cloned cry1Ab gene indicated that the open reading frame consisted of 3,465 bases encoding a protein of 1,155 amino acid residues with an estimated molecular weight of 130 kDa. Homology comparisons revealed that the deduced amino acid sequence of cry1Ab had a variation of seven amino acid residues compared to those of the known Cry1Ab proteins in the NCBI database and this gene has been designated as cry1Ab26 by the B. thuringiensis δ-endotoxin Nomenclature Committee. cry1Ab26 was cloned into pET 29a(+) vector and expressed in E. coli strain BL21 (DE3) under the control of T7 promoter with IPTG induction. ELISA, SDS-PAGE, and Western blot analysis confirmed the expression of 130-kDa protein. Insect bioassays with neonate larvae of Helicoverpa armigera showed that the partially purified Cry1Ab26 caused 97 % mortality within 5 days of feeding.
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