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Biotechnol Lett. 2005 Mar;27(6):435-42.

Expression of a self-processing, pathogen resistance-enhancing gene construct in Arabidopsis.

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  • 1School of Forest Resources, The Pennsylvania State University, University Park, PA 16802, USA.


A gene cassette, p35S-CNO, was designed to express three gene products driven by a single constitutive CaMV 35S promoter. The individual coding regions were linked in frame to produce a single polyprotein, using spacer sequences encoding a specific heptapeptide cleavage recognition site (ENLYFQS) for the nuclear-inclusion-a (NIa) proteinase of tobacco etch virus (TEV). The protein coding sequences used were: a Trichoderma harzinum endochitinase, a truncated NIa proteinase of TEV, and a wheat oxalate oxidase. When p35S-CNO construct was tested in Arabidopsis thaliana, the polyprotein was properly cleaved after translation and the products exhibited functional enzymatic activity in vivo.

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