Methods of optimizing substrate pools and biosynthesis of
poly-.beta.-hydroxybutyrate-co-poly-.beta.-hydroxyvalerate in bacteria
and plants
    6.
    发明授权
    Methods of optimizing substrate pools and biosynthesis of poly-.beta.-hydroxybutyrate-co-poly-.beta.-hydroxyvalerate in bacteria and plants 失效
    在细菌和植物中优化底物池和聚-β-羟基丁酸酯 - 共 - 聚-β-羟基戊酸酯的生物合成的方法

    公开(公告)号:US5942660A

    公开(公告)日:1999-08-24

    申请号:US628039

    申请日:1996-04-04

    摘要: Genes and methods for optimizing levels of substrates employed in the biosynthesis of copolymers of 3-hydroxybutyrate (3HB) and 3-hydroxyvalerate (3HV) in plants and bacteria via manipulation of normal metabolic pathways using recombinant DNA techniques are provided. This is achieved through the use of a variety of wild-type and/or deregulated enzymes involved in the biosynthesis of aspartate family amino acids, and wild-type or deregulated forms of enzymes, such as threonine deaminase, involved in the conversion of threonine to P(3HB-co-3HV) copolymer end product. By these methods, enhanced levels of threonine, .alpha.-ketobutyrate, propionate, propionyl-CoA, .beta.-ketovaleryl-CoA, and .beta.-hydroxyvaleryl-CoA are produced. Also provided are methods for the biological production of P(3HB-co-3HV) copolymers in plants and bacteria utilizing propionyl-CoA produced through a variety of engineered metabolic pathways. Introduction into plants and bacteria of an appropriate .beta.-ketothiolase, .beta.-ketoacyl-CoA reductase, and PHA synthase, alone or in combination with various enzymes involved in asparate family amino acid biosynthesis and the conversion of threonine to PHA copolymer precursors, will permit these organisms to produce P(3HB-co-3HV) copolymers.

    摘要翻译: 提供了通过使用重组DNA技术操作正常代谢途径来优化在植物和细菌中3-羟基丁酸酯(3HB)和3-羟基戊酸酯(3HV)的共聚物的生物合成中使用的底物水平的基因和方法。 这通过使用参与天冬氨酸家族氨基酸的生物合成的各种野生型和/或失调的酶以及涉及苏氨酸转化的野生型或去调节形式的酶,例如苏氨酸脱氨酶来实现 P(3HB-co-3HV)共聚物最终产物。 通过这些方法,产生了苏氨酸,α-酮丁酸酯,丙酸酯,丙酰基-CoA,β-酮戊酰-CoA和β-羟基戊酰-CoA的增强水平。 还提供了在植物和细菌中利用通过各种工程化代谢途径产生的丙酰辅酶A生物生产P(3HB-co-3HV)共聚物的方法。 单独或与参与天冬氨酸家族氨基酸生物合成的各种酶以及将苏氨酸转化为PHA共聚物前体的合适的β-酮硫解酶,β-酮酰基-CoA还原酶和PHA合酶的植物和细菌的引入将允许这些 生物体产生P(3HB-co-3HV)共聚物。

    Methods of optimizing substrate pools and biosynthesis of
poly-.beta.-hydroxybutyrate-co-poly-.beta.-hydroxyvalerate in bacteria
and plants
    7.
    发明授权
    Methods of optimizing substrate pools and biosynthesis of poly-.beta.-hydroxybutyrate-co-poly-.beta.-hydroxyvalerate in bacteria and plants 失效
    在细菌和植物中优化底物池和聚-β-羟基丁酸酯 - 共 - 聚-β-羟基戊酸酯的生物合成的方法

    公开(公告)号:US5958745A

    公开(公告)日:1999-09-28

    申请号:US673388

    申请日:1996-06-28

    摘要: Genes and methods for optimizing levels of substrates employed in the biosynthesis of copolymers of 3-hydroxybutyrate (3HB) and 3-hydroxyvalerate (3HV) in plants and bacteria via manipulation of normal metabolic pathways using recombinant DNA techniques are provided. This is achieved through the use of a variety of wild-type and/or deregulated enzymes involved in the biosynthesis of aspartate family amino acids, and wild-type or deregulated forms of enzymes, such as threonine deaminase, involved in the conversion of threonine to P(3HB-co-3HV) copolymer endproduct. By these methods, enhanced levels of threonine, .alpha.-ketobutyrate, propionate, propionyl-CoA, .beta.-ketovaleryl-CoA, and .beta.-hydroxyvaleryl-CoA are produced. Also provided are methods for the biological production of P(3HB-co-3HV) copolymers in plants and bacteria utilizing propionyl-CoA produced through a variety of engineered metabolic pathways. Introduction into plants and bacteria of an appropriate .beta.-ketothiolase, .beta.-ketoacyl-CoA reductase, and PHA synthase, alone or in combination with various enzymes involved in asparate family amino acid biosynthesis and the conversion of threonine to PHA copolymer precursors, will permit these organisms to produce P(3HB-co-3HV) copolymers.

    摘要翻译: 提供了通过使用重组DNA技术操作正常代谢途径来优化在植物和细菌中3-羟基丁酸酯(3HB)和3-羟基戊酸酯(3HV)的共聚物的生物合成中使用的底物水平的基因和方法。 这通过使用参与天冬氨酸家族氨基酸的生物合成的各种野生型和/或失调的酶以及涉及苏氨酸转化的野生型或去调节形式的酶,例如苏氨酸脱氨酶来实现 P(3HB-co-3HV)共聚物末端产物。 通过这些方法,产生了苏氨酸,α-酮丁酸酯,丙酸酯,丙酰基-CoA,β-酮戊酰-CoA和β-羟基戊酰-CoA的增强水平。 还提供了在植物和细菌中利用通过各种工程化代谢途径产生的丙酰辅酶A生物生产P(3HB-co-3HV)共聚物的方法。 单独或与参与天冬氨酸家族氨基酸生物合成的各种酶以及将苏氨酸转化为PHA共聚物前体的合适的β-酮硫解酶,β-酮酰基-CoA还原酶和PHA合成酶的植物和细菌的引入将允许这些 生物体产生P(3HB-co-3HV)共聚物。

    Expression of sucrose phosphorylase in plants
    10.
    再颁专利
    Expression of sucrose phosphorylase in plants 有权
    蔗糖磷酸化酶在植物中的表达

    公开(公告)号:USRE39114E1

    公开(公告)日:2006-05-30

    申请号:US10443787

    申请日:2003-05-22

    摘要: Introducing sucrose phosphorylase activity into plants by transformation with a gene for the enzyme increases the rate of sucrose hydrolysis, leading to increased starch, oil, and/protein levels. Sucrose phosphorylase genes from Streptococcus mutans and Leuconostoc mesenteroides have been found particularly advantageous for use in the present invention. Surprisingly, in potatoes transformed to express these genes in tubers, reduced bruise discoloration susceptibility and increased uniformity of starch deposition throughout the tuber are achieved.

    摘要翻译: 通过用酶的基因转化将蔗糖磷酸化酶活性引入植物中增加蔗糖水解速率,导致淀粉,油和/和蛋白质水平升高。 发现来自变形链球菌和肠系膜梭菌的蔗糖磷酸化酶基因已经被发现特别有利于用于本发明。 令人惊讶的是,在转化成在块茎中表达这些基因的马铃薯中,实现了整个块茎中降低的瘀伤变色敏感性和淀粉沉积的均匀性。