Rna binding protein and binding site useful for expression...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/82 (2006.01) C07K 14/405 (2006.01) C07K 14/415 (2006.01) C07K 16/12 (2006.01) C12N 9/90 (2006.01) C12N 15/10 (2006.01) C12N 15/63 (2006.01) C12N 15/70 (2006.01) C12N 15/79 (2006.01) C12P 21/02 (2006.01)

Patent

CA 2278523

The present invention relates to a gene expression system in eukaryotic and prokaryotic cells, preferably plant cells and intact plants. In particular, the invention relates to an expression system having a RB47 binding site upstream of a translation initiation site for regulation of translation mediated by binding of RB47 protein, a member of the poly(A) binding protein family. Regulation is further effected by RB60, a protein disulfide isomerase. The expression system is capable of functioning in the nucleus/cytoplasm of cells and in the chloroplast of plants. Translational regulation of a desired molecule is enhanced approximately 100 fold over that obtained without RB47 binding site activation.

La présente invention se rapporte à un système d'expression génique présent dans des cellules eucaryotes et procaryotes, de préférence dans des cellules végétales et des plantes intactes. L'invention se rapporte tout particulièrement à un système d'expression possédant un site de liaison au gène RB47 en amont d'un site d'initiation de la traduction permettant la régulation de la traduction exercée par la liaison de la protéine RB47, un élément de la famille de protéines de liaison poly(A). La régulation est en outre assurée par RB60, une isomérase de bisulfure protéique. Le système d'expression est capable de fonctionner dans le noyau ou le cytoplasme de cellules et dans le chloroplaste de plantes. La régulation de la traduction d'une molécule désirée est accentuée approximativement par un facteur de 100 par rapport à celle obtenue sans activation du site de liaison au RB47.

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