Process for modifying glucose repression
    13.
    发明授权
    Process for modifying glucose repression 失效
    改变葡萄糖抑制的方法

    公开(公告)号:US06326477B1

    公开(公告)日:2001-12-04

    申请号:US09029755

    申请日:1998-03-02

    IPC分类号: C07H2102

    摘要: The present invention relates to recombinant-DNA-technology, and particularly to genes involved in the control of basic metabolic processes in fungi. The invention specifically provides a mutated form of the native glucose repressor gene cre of filamentous fungi, wherein the mutation is situated in the C-terminal domain, the N-terminal first zinc finger being intact and the C-terminal region including the second zinc finger being mutated so that the viability of a strain carrying said mutated gene is maintained and the glucose repression is relieved.

    摘要翻译: 本发明涉及重组DNA技术,特别涉及参与控制真菌中基本代谢过程的基因。 本发明具体提供了突变形式的丝状真菌的天然葡萄糖阻遏物基因cre,其中突变位于C末端结构域,N末端第一锌指是完整的,C末端区包括第二锌指 突变,使得携带所述突变基因的菌株的存活力得以维持并且葡萄糖抑制得到缓解。

    Genetically modified fungi and their use in lipid production
    14.
    发明授权
    Genetically modified fungi and their use in lipid production 有权
    转基因真菌及其在脂质生产中的应用

    公开(公告)号:US09518276B2

    公开(公告)日:2016-12-13

    申请号:US13806281

    申请日:2011-06-21

    摘要: The invention refers to fungal cells, and especially to oleaginous fungal cells that have been genetically modified to produce enzymes of the pyruvate dehydrogenase bypass route to enhance their lipid production. Especially the cells are modified to over-express genes encoding pyruvate decarboxylase (PDC), acetaldehyde dehydrogenase (ALD) and/or acetyl-CoA synthetase (ACS), optionally together with a gene encoding diacylglycerol acyltransferase (DAT), or to express genes encoding PDC together with ALD and/or ACS. Methods of producing lipids, biofuels and lubricants using the modified fungi are also disclosed as well as expression cassettes useful therein. A new enzyme having phospholipid: diacylglycerol acyltransferase (PDAT) activity and a polynucleotide encoding it are also disclosed, which are useful in the lipid production. A recombinant Cryptococcus cell and its construction is described.

    摘要翻译: 本发明涉及真菌细胞,尤其涉及已被遗传修饰以产生丙酮酸脱氢酶旁路途径的酶以增强其脂质产生的油质真菌细胞。 特别地,细胞被修饰为过度表达编码丙酮酸脱羧酶(PDC),乙醛脱氢酶(ALD)和/或乙酰辅酶A合成酶(ACS)的基因,任选与编码二酰基甘油酰基转移酶(DAT)的基因一起,或表达编码 PDC与ALD和/或ACS。 还公开了使用改性真菌生产脂质,生物燃料和润滑剂的方法以及在其中有用的表达盒。 还公开了具有磷脂:二酰基甘油酰基转移酶(PDAT)活性的新酶和编码它的多核苷酸,其可用于脂质生产。 描述了重组隐球藻细胞及其构建。

    Manufacture of xylonic acid
    20.
    发明授权
    Manufacture of xylonic acid 有权
    木糖酸的制造

    公开(公告)号:US09315834B2

    公开(公告)日:2016-04-19

    申请号:US13256559

    申请日:2010-03-17

    CPC分类号: C12P7/58 C12N9/0006

    摘要: Provided is a method for producing xylonic acid from xylose with a recombinant fungal strain that is genetically modified to express a xylose dehydrogenase gene, which is able to convert xylose to xylonolactone, which is spontaneously or enzymatically hydrolyzed to xylonic acid. The xylonic acid is excreted outside the host cell. Xylonate production may be coupled with xylitol production. Alternatively, if xylitol production is not desired, its production is reduced by removing the aldose reductase (or specific xylose reductase) enzyme, which converts xylose to xylitol. Expression of a heterologous lactonase encoding gene may result in higher acid concentrations. The method is suitable for producing xylonic acid from a hemicellulose hydrolysate such as hydrolyzed lignocellulosic plant biomass.

    摘要翻译: 本发明提供了一种从木糖中生产木糖的方法,该重组真菌菌株被遗传修饰以表达木糖脱氢酶基因,其能够将木糖转化为己内酰胺,该木糖自发或酶促水解成木糖酸。 木糖酸在宿主细胞外排出。 木糖苷生产可能与木糖醇生产相结合。 或者,如果不需要木糖醇生产,则通过除去将木糖转化为木糖醇的醛糖还原酶(或特异性木糖还原酶)酶来降低其产生。 异源内含子编码基因的表达可能导致较高的酸浓度。 该方法适用于从半纤维素水解产物如水解木质纤维素植物生物质生产木糖酸。