Mutant microorganisms to synthesize colanic acid, mannosylated and/or fucosylated oligosaccharides

    公开(公告)号:US10738336B2

    公开(公告)日:2020-08-11

    申请号:US15839264

    申请日:2017-12-12

    申请人: Inbiose N.V.

    摘要: The present invention relates to mutated and/or transformed microorganisms for the synthesis of various compounds. More specifically, the present invention discloses microorganisms mutated in the genes encoding for the regulators ArcA and IclR. The latter mutations result in a significant upregulation of the genes that are part of the colanic acid operon. Hence, said microorganisms are useful for the synthesis of any compound being part of the colanic acid pathway such as GDP-fucose, GDP-mannose and colanic acid, and/or, can be further used—starting form GDP-fucose as a precursor—to synthesize fucosylated oligosaccharides or—starting from GDP-mannose as a precursor—to synthesize mannosylated oligosaccharides. In addition, mutations in the genes coding for the transcriptional regulators ArcA and IclR lead to an acid resistance phenotype in the exponential growth phase allowing the synthesis of pH sensitive molecules or organic acids.

    IN VIVO SYNTHESIS OF SIALYLATED COMPOUNDS
    4.
    发明申请

    公开(公告)号:US20190338328A1

    公开(公告)日:2019-11-07

    申请号:US16473932

    申请日:2017-12-26

    申请人: INBIOSE N.V.

    摘要: The present invention is in the technical field of synthetic biology and metabolic engineering. More particularly, the present invention is in the technical field of fermentation of metabolically engineered microorganisms. The present invention describes engineered microorganisms able to synthesize sialylated compounds via an intracellular biosynthesis route. These microorganisms can dephosphorylate N-acetylglucosamine-6-phosphate to N-acetylglucosamine and convert the N-acetylglucosamine to N-acetylmannosamine. These microorganisms also have the ability to convert N-acetylmannosamine to N-acetyl-neuraminate. Furthermore, the present invention provides a method for the large scale in vivo synthesis of sialylated compounds, by culturing a microorganism in a culture medium, optionally comprising an exogenous precursor such as, but not limited to lactose, lactoNbiose, N-acetyllactosamine and/or an aglycon, wherein said microorganism intracellularly dephosphorylates N-acetylglucosamine-6-phosphate to N-acetylglucosamine, converts N-acetylglucosamine to N-acetylmannosamine and convert the latter further to N-acetyl-neuraminate.

    VARIANT SUCROSE PERMEASE POLYPEPTIDES
    9.
    发明公开

    公开(公告)号:US20240035004A1

    公开(公告)日:2024-02-01

    申请号:US18254345

    申请日:2021-12-17

    申请人: INBIOSE N.V.

    IPC分类号: C12N9/12 C12N1/20

    摘要: The present invention is in the technical field of synthetic biology and metabolic engineering. More particularly, the present invention is in the technical field of fermentation of metabolically engineered cells. The present invention describes new sucrose permease polypeptides, and their applications. The present invention also describes a metabolically engineered cell for the production of a glycosylated product using the novel sucrose permease polypeptides. Furthermore, the present invention provides a method for the production of a glycosylated product by a cell using the novel sucrose permease polypeptides as well as the purification of said glycosylated product from the cultivation.