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    • 2. 发明授权
    • Polyhydroxybutyrate polymerase
    • 聚羟基丁酸聚合酶
    • US06528706B1
    • 2003-03-04
    • US09935244
    • 2001-08-21
    • Oliver P. PeoplesAnthony J. Sinskey
    • Oliver P. PeoplesAnthony J. Sinskey
    • A01H500
    • C12N9/0006C12N9/00C12N9/1029C12N15/52C12P7/625
    • A method for controlling and modifying biopolymer synthesis by manipulation of the genetics and enzymology of synthesis of polyhydroxybutyrate (PHB) and polyhydroxyalkanoate (PHA) polyesters at the molecular level in procaryotic and eukaryotic cells, especially plants. Examples demonstrate the isolation, characterization, and expression of the genes involved in the production of PHB and PHA polymers. Genes encoding the enzymes in the PHB and PHA synthetic pathway (beta-ketothiolase, acetoacetyl-CoA reductase and PHB polymerase or PHA polymerase) from Zoogloea ramigera strain I-16-M, Alcaligenes eutrophus, Nocardia salmonicolur, and Psuedomonas olevarans were identified or isolated and expressed in a non-PHB producing organism, E. coli. Specific modifications to the polymers include variation in the chain length of the polymers and incorporation of different monomers into the polymers to produce co-polymers with different physical properties.
    • 通过在原核和真核细胞,特别是植物中的分子水平处理聚羟基丁酸酯(PHB)和聚羟基链烷酸酯(PHA)聚酯的遗传学和酶学方法来控制和改变生物聚合物合成的方法。 实施例证明参与PHB和PHA聚合物生产的基因的分离,表征和表达。 鉴定或分离来自Zoogloea苎麻菌株I-16-M,产碱假单胞菌,痢疾杆菌(Nocardia salmonicolur)和橄榄油(Psuedomonas olevarans)的PHB和PHA合成途径(β-酮硫解酶,乙酰乙酰辅酶A还原酶和PHB聚合酶或PHA聚合酶)中的酶编码基因 并在非PHB生物体大肠杆菌中表达。 对聚合物的具体修饰包括聚合物链长度的变化以及将不同单体引入到聚合物中以产生具有不同物理性质的共聚物。
    • 3. 发明授权
    • Gene encoding bacterial beta-ketothiolase
    • 基因编码细菌β-酮硫解酶
    • US5661026A
    • 1997-08-26
    • US435083
    • 1995-05-04
    • Oliver P. PeoplesAnthony J. Sinskey
    • Oliver P. PeoplesAnthony J. Sinskey
    • C12N9/00C12N9/04C12N9/10C12N15/52C12P7/62C12N15/54C12N15/74C12N15/75
    • C12N9/0006C12N15/52C12N9/00C12N9/1029C12P7/625
    • The present invention is a method for controlling biopolymer synthesis by determining the genetics and enzymology of polyhydroxybutyrate (PHB) biosynthesis at the molecular level. The purified enzymes and genes provide the means for developing new PHB-like biopolymers having polyester backbones. Specific aims are to 1) control the chain length of the polymers produced in fermentation processes through genetic manipulation, 2) incorporate different monomers into the polymers to produce co-polymers with different physical properties, and 3) examine the physical/rheological properties of these new biopolymers in order to develop further design criteria at the molecular level.The method for engineering biopolymer synthesis includes: isolation and characterization of the genes for the enzymes in the synthetic pathway (beta-ketothiolase, acetoacetyl-CoA reductase and PHB synthetase); cloning of the genes in a vector(s); placement of the vector(s) under the control of regulated promoters; expression of the genes; determination of the function and use of other factors such as substrate specificity in polymer production and composition; and isolation and physical and chemical analysis of the resulting polymers.
    • 本发明是通过在分子水平上测定聚羟基丁酸(PHB)生物合成的遗传学和酶学方法来控制生物聚合物合成的方法。 纯化的酶和基因为开发具有聚酯主链的新型PHB样生物聚合物提供了手段。 具体目的是1)通过遗传操作来控制在发酵过程中产生的聚合物的链长; 2)将不同的单体引入到聚合物中以产生具有不同物理性质的共聚物,以及3)检查这些物质/流变性质 新的生物聚合物,以便在分子水平上制定进一步的设计标准。 工程生物聚合物合成的方法包括:合成途径中酶的分离和表征(β-酮硫解酶,乙酰乙酰辅酶A还原酶和PHB合成酶); 在载体中克隆基因; 将载体置于受调节启动子的控制下; 基因表达; 确定聚合物生产和组成中其他因素如底物特异性的功能和用途; 以及所得聚合物的分离和物理和化学分析。
    • 4. 发明授权
    • Gene encoding bacterial acetoacetyl-COA reductase
    • 基因编码细菌乙酰乙酰辅酶A还原酶
    • US5512669A
    • 1996-04-30
    • US297667
    • 1994-08-29
    • Oliver P. PeoplesAnthony J. Sinskey
    • Oliver P. PeoplesAnthony J. Sinskey
    • C12N9/00C12N9/04C12N9/10C12N15/52C12P7/62C12N15/53
    • C12N9/0006C12N15/52C12N9/00C12N9/1029C12P7/625
    • The present invention is a method for controlling biopolymer synthesis by determining the genetics and enzymology of polyhydroxybutyrate (PHB) biosynthesis at the molecular level. The purified enzymes and genes provide the means for developing new PHB-like bicpolymers having polyester backbones. Specific aims are to 1) control the chain length of the polymers produced in fermentation processes through genetic manipulation, 2) incorporate different monomers into the polymers to produce co-polymers with different physical properties, and 3) examine the physical/rheological properties of these new biopolymers in order to develop further design criteria at the molecular level.The method for engineering biopolymer synthesis includes: isolation and characterization of the genes for the enzymes in the synthetic pathway (beta-ketothiolase, acetoacetyl-CoA reductase and PHB synthetase); cloning of the genes in a vector(s); placement of the vector(s) under the control of regulated promoters; expression of the genes; determination of the function and use of other factors such as substrate specificity in polymer production and composition; and isolation and physical and chemical analysis of the resulting polymers.
    • 本发明是通过在分子水平上测定聚羟基丁酸(PHB)生物合成的遗传学和酶学方法来控制生物聚合物合成的方法。 纯化的酶和基因提供了开发具有聚酯主链的新型PHB-类双聚物的手段。 具体目的是1)通过遗传操作来控制在发酵过程中产生的聚合物的链长; 2)将不同的单体引入到聚合物中以产生具有不同物理性质的共聚物,以及3)检查这些物质/流变性质 新的生物聚合物,以便在分子水平上制定进一步的设计标准。 工程生物聚合物合成的方法包括:合成途径中酶的分离和表征(β-酮硫解酶,乙酰乙酰辅酶A还原酶和PHB合成酶); 在载体中克隆基因; 将载体置于受调节启动子的控制下; 基因表达; 确定聚合物生产和组成中其他因素如底物特异性的功能和用途; 以及所得聚合物的分离和物理和化学分析。
    • 7. 发明授权
    • Zoogloea transformation using exopoly saccharide non-capsule producing
strains
    • Zoogloea转化使用外源糖非胶囊生产菌株
    • US4948733A
    • 1990-08-14
    • US35604
    • 1987-04-07
    • Donald D. Easson, Jr.Oliver P. PeoplesAnthony J. Sinskey
    • Donald D. Easson, Jr.Oliver P. PeoplesAnthony J. Sinskey
    • C09K8/90C12N1/21C12N15/52C12P19/04
    • C09K8/905C12N15/52C12P19/04
    • Two new bacterial strains designated Zoogloea ramigera 115SL and Zoogloea ramigera 115SLR, a rifampicin resistant derivative of 115SL, have been developed. These strains are derived from the wild type Zoogloea ramigera 115, ATCC 25935. The two new strains produce a novel exopolysaccharide (EPS) and have several desirable characteristics that are absent from the parent strain, including improved culture properties, since they do not produce an EPS capsule layer like that of the parent 115 strain. The 115SL EPS is instead excreted as a slime layer which is not confined to the immediate area surrounding the cells. Since cells are not trapped within a floc where they grow at a reduced rate or die because of nutrient starvation, the new strains have more consistent and reproducible growth cycles and increased growth rates. As a consequence, exopolysaccharide production is more consistent and titers are higher. The separation of the EPS from the cells is also much easier and more economical. The other very important characteristic of strains 115SL and 115SLR is that they are able to receive foreign DNA using conventional techniques due to the absence of the capsule layer. This facilitates the application of recombinant DNA technology to control and produce novel expolysaccharides.
    • 已经开发了两种新的细菌菌株,称为Zoogloea ramigera 115SL和Zoogloea ramigera 115SLR,115SL的利福平抗性衍生物。 这些菌株衍生自野生型Zoogloea ramigera 115,ATCC 25935.两种新菌株产生新颖的外多糖(EPS),并具有几种所需的特征,其不存在于亲本菌株中,包括改良的培养性质,因为它们不产生 EPS胶囊层像母体115株。 相反,115SL EPS排泄成为不限于细胞周围的紧邻区域的粘液层。 由于细胞不被捕获在絮状物中,它们以降低的速率生长或由于营养物质饥饿而死亡,所以新菌株具有更一致和可重现的生长周期和增加的生长速率。 结果,外多糖生产更一致,滴度更高。 EPS与细胞的分离也更容易和更经济。 菌株115SL和115SLR的另一个非常重要的特征是,由于不存在胶囊层,它们能够使用常规技术接收外源DNA。 这有利于重组DNA技术的应用来控制和生产新的多糖。