Acetohydroxyacid synthase promoter for expression of...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/82 (2006.01) A01H 5/00 (2006.01) C12N 9/88 (2006.01) C12N 15/60 (2006.01) C12N 15/65 (2006.01)

Patent

CA 2198497

The present invention is directed to isolated non-coding nucleotide sequences useful as promoters for heterologous gene expression in plants. The present invention is also directed to vectors and plant cells comprising the isolated nucleotide sequences. AHAS promoters from maize are used to express introduced genes at high levels and in various plant tissues. Promoters from the aIs1 and aIs2 genes of maize are cloned and sequenced, and the promoter regions from these genes are then introduced into a plasmid 5' to the reporter gene beta-glucuronidase (GUS). Both promoter fragments are from the X112 maize line. The aIs1 promoter fragment is approximately 1400 base pairs long, whereas the aIs2 promoter fragment contains 819 base pairs.

La présente invention concerne des séquences nucléotidiques non codantes isolées servant de promoteurs pour l'expression de gènes hétérologues dans des végétaux. Elle concerne également des vecteurs et des cellules végétales comprenant ces séquences nucléotidiques isolées. Des promoteurs de l'AHAS issus du maïs sont utilisés pour exprimer, à des niveaux élevés et dans divers tissus végétaux, des gènes introduits. Des promoteurs issus des gènes als1 et als2 du maïs sont clonés et séquencés, et les régions promotrices issues de ces gènes sont ensuite introduites dans un plasmide en position 5' du gène reporter béta glucuronidase (GUS). Ces deux fragments promoteurs sont issus de la lignée de maïs XI12. Le fragment promoteur als1 présente une longueur approximative de 1400 paires de bases, tandis que le fragment promoteur als2 contient 819 paires de bases.

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