Abstract
Bacillus thuringiensis produces a 130–135-kDa insecticidal protein in the form of bipyramidal crystal which is toxic to lepidopteran larvae. Part of the C-terminal region of the native Cry1Ab was replaced by a heterologous sequence of Cry11Aa C-terminus to get a 3′-spliced cry1Ab gene. The full-length cry1Ab and 3′-spliced cry1Ab, which were both cloned into the E. coli–B. thuringiensis shuttle expression vector pHZB1, were expressed in a 135-kDa crystal protein minus derivative of B. thuringiensis subsp. kyushuensis (4U1-Cry−135). The crystal shape of Cry1Ab proteins from both recombinants was regularly bipyramidal, while the crystal size of the intact Cry1Ab was approximately fivefold larger than the 3′-spliced Cry1Ab. In addition, these two kinds of Cry1Ab proteins had similar toxicity against Argyrogramma agnata larvae.
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Received: 19 October 2001 / Accepted: 7 December 2001
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Yu, J., Xie, R., Tan, L. et al. Expression of the Full-Length and 3′-Spliced cry1Ab Gene in the 135-kDa Crystal Protein Minus Derivative of Bacillus thuringiensis subsp. kyushuensis . Curr Microbiol 45, 133–138 (2002). https://doi.org/10.1007/s00284-001-0092-7
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DOI: https://doi.org/10.1007/s00284-001-0092-7