Optimizing the expression of chimeric genes in plant cells |
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Authors: | Janet L Taylor Jonathan D G Jones Steve Sandler Gunhild M Mueller John Bedbrook and Pamela Dunsmuir |
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Institution: | (1) Advanced Genetic Sciences, Inc., 6701 San Pablo Avenue, 94608 Oakland, CA, USA;(2) Present address: Max-Planck-Institut für Züchtungsforschung, D-500 Köln 30, Federal Republic of germany |
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Abstract: | Summary The Serratia marcescens chiA gene encodes a secreted chitinase activity which contributes to the fungal growth inhibition exhibited by this bacterium. The coding region from the chiA gene was fused to the promoter and 3 polyadenylation region of the Agrobacterium nopaline synthase gene. Site-directed mutagenesis of specific nucleotides surrounding the initiating AUG of the coding sequence of this chimeric gene resulted in up to an eight-fold increase in the amount of chitinase protein detected in transformed plant tissue. Analysis of the chiA mRNA indicated that these nucleotides also affected mRNA levels. At least 50% of the chitinase protein produced in transformed tobacco cells was the same molecular weight as the S. marcescen secreted protein. |
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Keywords: | Translation optimization Chimeric genes Plant transformation chitinase |
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