Expression of sedoheptulose 1,7 bisphosphatase in transgenic...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/55 (2006.01) C12N 9/16 (2006.01) C12N 15/82 (2006.01)

Patent

CA 2372123

Sedoheptulose 1,7-bisphosphatase (SBPase) is an enzyme catalyzing the reaction converting sedoheptulose 1,7-bisphosphate into sedoheptulose 7-phosphate. This enzyme is located in the chloroplast in leaves and stems. Overexpression of SBPase in transgenic plants is provided to improve plant yield by increasing leaf starch biosynthetic ability in particular and sucrose production in general. Deregulated variants of the enzymes are also provided.

Le sédoheptulose 1,7-bisphosphatase (SPBase) est une enzyme qui catalyse la réaction convertissant le sédoheptulose 1,7-bisphosphate en séduheptulose 7-phosphate. Cette enzyme se trouve dans le chloroplaste des feuilles et des tiges. L'invention concerne la surexpression du SPBase dans les plantes transgéniques permettant d'améliorer le rendement des plantes par l'accroissement de la capacité biosynthétique de l'amidon foliaire en particulier et la production de saccharose en général. L'invention concerne également des variants desdites enzymes ayant subi une dérégulation. L'invention concerne également des variants desdites ennzymes ayant subi une dérégulation.

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