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    • 5. 发明申请
    • Mesophilic and Thermophilic Organisms Modified to Produce Acrylate, and Methods of Use Thereof
    • 修饰生产丙烯酸酯的嗜温嗜热生物及其使用方法
    • US20120149077A1
    • 2012-06-14
    • US13256297
    • 2010-03-12
    • Arthur J. Shaw, IVVineet Rajgarhia
    • Arthur J. Shaw, IVVineet Rajgarhia
    • C12P7/40C12N15/74C12N1/21
    • C12P7/40C12N9/0006C12N9/1029C12N9/1217C12N15/63C12P1/04C12R1/01
    • The present invention provides for novel metabolic pathways leading to acrylate formation in a consolidated bio-processing system (CBP) where lignocellulosic biomass is efficiently converted to acrylate. In one such metabolic pathway, pyruvate is converted to lactate, which is converted to lactoyol-CoA, which is converted to acryloyl-CoA, and which is finally converted to acrylate. In another such metabolic pathway, pyruvate is converted to L-α-alanine, which is converted to L-aspartate, which is converted to β-alanine, which is converted to β-alanyl-CoA, which is converted to acryloyl-CoA, and which is finally converted to acrylate. In yet another metabolic pathway, pyruvate is converted to lactate, and then lactate is converted directly to acrylate. In certain aspects, the invention provides for heterologous expression of one or more enzymes in a mesophilic or thermophilic organism, such as Thermoanaerobacterium saccharolyticum or Clostridium thermocellutn, where the one or more enzymes functions within a novel metabolic pathway as described above to convert pyruvate to acrylate via lactate, or via β alanine and acryloyl-CoA.
    • 本发明提供了导致在固体生物处理系统(CBP)中形成丙烯酸酯的新型代谢途径,其中木质纤维素生物质被有效地转化成丙烯酸酯。 在一种这样的代谢途径中,将丙酮酸转化为乳酸盐,将其转化为乳糖醇CoA,将其转化为丙烯酰辅酶A,最后转化为丙烯酸酯。 在另一个这样的代谢途径中,丙酮酸转化成L-谷氨酸,转化为L-天冬氨酸,转化为β-丙氨酸,转化为β-丙氨酰辅酶A,将其转化为丙烯酰 - CoA,最终转化为丙烯酸酯。 在另一种代谢途径中,将丙酮酸转化成乳酸,然后将乳酸酯直接转化成丙烯酸酯。 在某些方面,本发明提供了一种或多种酶在嗜温或嗜热生物体中的异源表达,所述生物体如热解酵母分解酶或热梭菌(Clostridium thermocellutn),其中一种或多种酶在如上所述的新型代谢途径中起作用以将丙酮酸转化为丙烯酸酯 通过乳酸盐,或通过&bgr; 丙氨酸和丙烯酰辅酶A。
    • 8. 发明授权
    • Isolation and characterization of Schizochytrium aggregatum cellobiohydrolase I (Cbh 1)
    • 裂殖壶菌纤维二糖水解酶I(Cbh 1)的分离和表征
    • US08470592B2
    • 2013-06-25
    • US13003199
    • 2009-07-07
    • Elena E. BrevnovaJim FlattChhayal GandhiVineet RajgarhiaJohn McBrideAnne Warner
    • Elena E. BrevnovaJim FlattChhayal GandhiVineet RajgarhiaJohn McBrideAnne Warner
    • C12N15/00C12N9/00C07H21/04C07K14/00
    • C12N9/2437C12Y302/01091Y02E50/16
    • The present invention provides for the isolation and characterization of the cbh1 gene from Schizochytrium aggregatum. In particular, the present invention provides for the nucleic acid and amino acid sequences of Schizochytrium aggregatum cbh1, and domains, variants and derivatives thereof. The present invention further provides for the heterologous expression of Schizochytrium aggregatum Cbh1 in host cells, including yeast, e.g., Saccharomyces cerevisiae. Expression of Schizochytrium aggregatum Cbh1 in host cells will augment cellulose digestion and facilitate ethanol production by those host cells on cellulosic substrates. In certain embodiments, heterologous expression in Saccharomyces cerevisiae is in coordination with heterologous expression of other known, or newly identified saccharolytic enzymes. Therefore, the present invention also provides that the novel Schizochytrium aggregatum Cbh1 gene can utilized in a consolidated bioprocessing system.
    • 本发明提供了来自裂殖壶菌的cbh1基因的分离和表征。 特别地,本发明提供了裂殖壶菌综合征cbh1及其结构域,变体和衍生物的核酸和氨基酸序列。 本发明还提供了在宿主细胞,包括酵母,例如酿酒酵母(Saccharomyces cerevisiae)的异源表达裂殖酵母凝集素Cbh1。 裂殖酵母聚集体Cbh1在宿主细胞中的表达将增加纤维素消化并促进那些宿主细胞在纤维素基质上的乙醇生成。 在某些实施方案中,酿酒酵母中的异源表达与其他已知或新鉴定的蔗糖分解酶的异源表达配合。 因此,本发明还提供了新颖的裂殖壶菌聚集体Cbh1基因可以用于固结的生物处理系统中。