Ethanol production using engineered mutant E. coli
    1.
    发明授权
    Ethanol production using engineered mutant E. coli 失效
    使用工程改造的大肠杆菌生产乙醇

    公开(公告)号:US5028539A

    公开(公告)日:1991-07-02

    申请号:US274075

    申请日:1988-11-21

    IPC分类号: C12N15/52 C12P7/06 G06T1/00

    摘要: The subject invention concerns novel means and materials for producing ethanol as a fermentation product. Mutant E. coli are transformed with a gene coding for pyruvate decarboxylase activity. The resulting system is capable of producing relatively large amounts of ethanol from a variety of biomass sources.

    摘要翻译: 本发明涉及用于生产乙醇作为发酵产物的新颖手段和材料。 突变大肠杆菌用编码丙酮酸脱羧酶活性的基因转化。 所得到的系统能够从各种生物质源产生相对大量的乙醇。

    Recombinant host cells and media for ethanol production
    3.
    发明授权
    Recombinant host cells and media for ethanol production 失效
    用于乙醇生产的重组宿主细胞和培养基

    公开(公告)号:US08652817B2

    公开(公告)日:2014-02-18

    申请号:US11922631

    申请日:2006-06-30

    IPC分类号: C12P7/06

    CPC分类号: C12N1/22 C12P7/065 Y02E50/17

    摘要: Disclosed are recombinant host cells suitable for degrading an oligosaccharide that have been optimized for growth and production of high yields of ethanol, and methods of making and using these cells. The invention further provides minimal media comprising urea-like compounds for economical production of ethanol by recombinant microorganisms. Recombinant host cells in accordance with the invention are modified by gene mutation to eliminate genes responsible for the production of unwanted products other than ethanol, thereby increasing the yield of ethanol produced from the oligosaccharides, relative to unmutated parent strains. The new and improved strains of recombinant bacteria are capable of superior ethanol productivity and yield when grown under conditions suitable for fermentation in minimal growth media containing inexpensive reagents. Systems optimized for ethanol production combine a selected optimized minimal medium with a recombinant host cell optimized for use in the selected medium. Preferred systems are suitable for efficient ethanol production by simultaneous saccharification and fermentation (SSF) using lignocellulose as an oligosaccharide source. The invention also provides novel isolated polynucleotide sequences, polypeptide sequences, vectors and antibodies.

    摘要翻译: 公开了适用于降解生物和生产高产率乙醇的低聚糖的重组宿主细胞,以及制备和使用这些细胞的方法。 本发明还提供了包含尿素样化合物的基本培养基,用于通过重组微生物经济地生产乙醇。 根据本发明的重组宿主细胞通过基因突变修饰以消除负责生产除乙醇以外的不需要的产物的基因,从而相对于未突变的亲本菌株增加了由寡糖产生的乙醇的产率。 当在含有廉价试剂的最小生长培养基中适于发酵的条件下生长时,新的和改良的重组细菌菌株能够获得优异的乙醇生产力和产量。 优化用于乙醇生产的系统将选定的优化的基本培养基与优化用于所选培养基的重组宿主细胞结合。 优选的系统适用于通过使用木素纤维素作为寡糖来源的同时糖化和发酵(SSF)来有效地生产乙醇。 本发明还提供了新的分离的多核苷酸序列,多肽序列,载体和抗体。

    Recombinant Host Cells and Media for Ethanol Production
    8.
    发明申请
    Recombinant Host Cells and Media for Ethanol Production 失效
    重组宿主细胞和乙醇生产的培养基

    公开(公告)号:US20100196978A1

    公开(公告)日:2010-08-05

    申请号:US11922631

    申请日:2006-06-30

    CPC分类号: C12N1/22 C12P7/065 Y02E50/17

    摘要: Disclosed are recombinant host cells suitable for degrading an oligosaccharide that have been optimized for growth and production of high yields of ethanol, and methods of making and using these cells. The invention further provides minimal media comprising urea-like compounds for economical production of ethanol by recombinant microorganisms. Recombinant host cells in accordance with the invention are modified by gene mutation to eliminate genes responsible for the production of unwanted products other than ethanol, thereby increasing the yield of ethanol produced from the oligosaccharides, relative to unmutated parent strains. The new and improved strains of recombinant bacteria are capable of superior ethanol productivity and yield when grown under conditions suitable for fermentation in minimal growth media containing inexpensive reagents. Systems optimized for ethanol production combine a selected optimized minimal medium with a recombinant host cell optimized for use in the selected medium. Preferred systems are suitable for efficient ethanol production by simultaneous saccharification and fermentation (SSF) using lignocellulose as an oligosaccharide source. The invention also provides novel isolated polynucleotide sequences, polypeptide sequences, vectors and antibodies.

    摘要翻译: 公开了适用于降解生物和生产高产率乙醇的低聚糖的重组宿主细胞,以及制备和使用这些细胞的方法。 本发明还提供了包含尿素样化合物的基本培养基,用于通过重组微生物经济地生产乙醇。 根据本发明的重组宿主细胞通过基因突变修饰以消除负责生产除乙醇以外的不需要的产物的基因,从而相对于未突变的亲本菌株增加了由寡糖产生的乙醇的产率。 当在含有廉价试剂的最小生长培养基中适于发酵的条件下生长时,新的和改良的重组细菌菌株能够获得优异的乙醇生产力和产量。 优化用于乙醇生产的系统将选定的优化的基本培养基与优化用于所选培养基的重组宿主细胞结合。 优选的系统适用于通过使用木素纤维素作为寡糖来源的同时糖化和发酵(SSF)来有效地生产乙醇。 本发明还提供了新的分离的多核苷酸序列,多肽序列,载体和抗体。

    Ethanol production by recombinant hosts
    10.
    发明授权
    Ethanol production by recombinant hosts 失效
    重组宿主生产乙醇

    公开(公告)号:US5424202A

    公开(公告)日:1995-06-13

    申请号:US846344

    申请日:1992-03-06

    摘要: Novel plasmids comprising genes which code for the alcohol dehydrogenase and pyruvate decarboxylase are described. Also described are recombinant hosts which have been transformed with genes coding for alcohol dehydrogenase and pyruvate. By virtue of their transformation with these genes, the recombinant hosts are capable of producing significant amounts of ethanol as a fermentation product. Also disclosed are methods for increasing the growth of recombinant hosts and methods for reducing the accumulation of undesirable metabolic products in the growth medium of these hosts. Also disclosed are recombinant host capable of producing significant amounts of ethanol as a fermentation product of oligosaccharides and plasmids comprising genes encoding polysaccharases, in addition to the genes described above which code for the alcohol dehydrogenase and pyruvate decarboxylase. Further, methods are described for producing ethanol from oligomeric feedstock using the recombinant hosts described above. Also provided is a method for enhancing the production of functional proteins in a recombinant host comprising overexpressing an adhB gene in the host. Further provided are process designs for fermenting oligosaccharide-containing biomass to ethanol.

    摘要翻译: 描述了包含编码醇脱氢酶和丙酮酸脱羧酶的基因的新型质粒。 还描述了已经用编码醇脱氢酶和丙酮酸的基因转化的重组宿主。 由于它们与这些基因的转化,重组宿主能够产生显着量的乙醇作为发酵产物。 还公开了增加重组宿主生长的方法和减少这些宿主生长培养基中不需要的代谢产物积累的方法。 还公开了能够产生显着量的乙醇作为寡糖的发酵产物的重组宿主和包含编码多糖酶的基因的质粒,除了上述描述了醇脱氢酶和丙酮酸脱羧酶的基因之外。 此外,描述了使用上述重组宿主从低聚原料生产乙醇的方法。 还提供了用于增强重组宿主中功能蛋白质生产的方法,其包括在宿主中过表达adhB基因。 进一步提供了将含有寡糖的生物质发酵成乙醇的方法设计。