47.
    发明专利
    未知

    公开(公告)号:BRPI0612900A2

    公开(公告)日:2014-10-14

    申请号:BRPI0612900

    申请日:2006-07-18

    Applicant: BASF AG

    Abstract: The present invention features improved processes and organisms for the production of methionine. The invention demonstrates that a &Dgr;metF organism or a &Dgr;metE AmetH organism, for example, mutants of C. glutamicum or E. coli, can use a methyl capped sulfide source, e.g., dimethyl disulfide (DMDS), as a source of both sulfur and a methyl group, bypassing the need for MetH/MetE and MetF activity and the need to reduce sulfate, for the synthesis of methionine. Also described in this patent are data implicating MetY (also called MetZ) as an enzyme that incorporates a methyl capped sulfide source, e.g., DMDS, into methionine. A &Dgr;metF &Dgr;metB strain of C. glutamicum can use a methyl capped sulfide source, e.g., DMDS, as a source of both sulfide and a methyl group. Furthermore, methionine production by engineered prototrophic organisms that overproduce O-acetyl-homoserine was improved by the addition of a methyl capped sulfide source, e.g., DMDS.

    48.
    发明专利
    未知

    公开(公告)号:BRPI0520842A2

    公开(公告)日:2012-07-03

    申请号:BRPI0520842

    申请日:2005-12-21

    Applicant: BASF AG

    Abstract: An expression unit (A) that contains several promoters is new. A new expression unit (A) comprises several promoters and includes, in the 5' to 3' direction the sequence module (I). 5'-P 1-(A x-P x) n-A y-P y-3' (I) n = integer 0-10; A x and A y = same or different chemical bonds or nucleic acid linker sequences; P 1, P x and P y = same or different promoter sequences, containing at least one RNA-polymerase binding region, and at least P y also includes a ribosome-binding, 3'-terminal segment. Independent claims are also included for: (1) an expression cassette (EC) that contains, in the 5' to 3' direction, the sequence module (II); (2) vector that contains at least one EC; (3) a genetically modified microorganism (GMO) transfected with the vector of (2) or containing EC; and (4) method for preparing biosynthetic products (X) by culturing GMO. 5'-P 1-(A x-P x) n-A y-P y-G-3' (II) G : at least one nucleic acid coding sequence functionally linked to the 5'-upstream regulatory sequence.

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