Metabolically engineered cells for the production of...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 1/19 (2006.01) A23D 9/00 (2006.01) A23K 1/16 (2006.01) A23L 1/30 (2006.01) A61K 8/92 (2006.01) C12N 9/02 (2006.01) C12N 9/10 (2006.01) C12N 15/52 (2006.01) C12N 15/53 (2006.01) C12N 15/54 (2006.01) C12N 15/81 (2006.01) C12P 7/64 (2006.01)

Patent

CA 2568689

The present invention relates to the construction and engineering of cells, more particularly microorganisms for producing PUFAs with four or more double bonds from non-fatty acid substrates through heterologous expression of an oxygen requiring pathway. The invention especially involves improvement of the PUFA content in the host organism through fermentation optimization, e.g. decreasing the temperature and/or designing an optimal medium, or through improving the flux towards fatty acids by metabolic engineering, e.g. through over-expression of fatty acid synthases, over-expression of other enzymes involved in biosynthesis of the precursor for PUFAs, or codon optimization of the heterologous genes, or expression of heterologous enzymes involved in the biosynthesis of the precursor for PUFAs.

La présente invention se rapporte à l'élaboration et à la modification de cellules, plus particulièrement de micro-organismes pour la production d'acides gras polyinsaturés (PUFA) ayant au moins quatre doubles liaisons à partir de substrats d'acides non gras, au moyen de l'expression hétérologue d'une voie nécessitant de l'oxygène. L'invention se rapporte particulièrement à l'accroissement de la teneur en PUFA dans l'organisme hôte au moyen d'une optimisation par fermentation, par exemple par réduction de la température et/ou conception d'un milieu optimal, ou au moyen d'un accroissement du flux en direction des acides gras par modification métabolique, par exemple au moyen de la sur-expression des acides gras synthases, de la sur-expression d'autres enzymes impliquées dans la biosynthèse des précurseurs associés aux PUFA, de l'optimisation des codons des gènes hétérologues, ou de l'expression des enzymes hétérologues impliquées dans la biosynthèse du précurseur associé aux PUFA.

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