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    • 12. 发明公开
    • GENE DISRUPTED YEAST
    • HEFE MIT UNTERBROCHENEM GEN
    • EP1352958A1
    • 2003-10-15
    • EP02716318.7
    • 2002-01-18
    • KANEKA CORPORATION
    • FUKUCHI, KenYOKOMIZO, SatoruOSAKADA, FumioMATSUMOTO, KeijiTAKAGI, MasamichiOTA, Akinori
    • C12N15/09C12N1/19C12P7/62
    • C12N9/93C12P7/625C12Y603/02006
    • The invention provides a yeast in which a specific gene alone has been disrupted and to which auxotrophy is impared to construct a system for producing an industrially useful substance through gene recombination by utilizing characteristics of a yeast.
      In the practice of the invention, a yeast strain in which ADE1 gene has been disrupted is constructed by homologous recombination with a chromosomal DNA by using an ADE1 gene fragment encoding phosphoribosylaminoimidazole succinocarboxamide synthase (EC6.3.2.6) of Candida maltosa. In the practice of the invention, then, this disrupted strain is transformed by a gene expression cassette containing a biodegradable polyester synthase gene and the obtained transformant is cultured to thereby produce biodegradable polyester.
    • 本发明提供了一种酵母,其中单独的特定基因已经被破坏并且通过利用酵母的特性通过基因重组构建了用于产生工业上有用物质的制剂的营养缺陷型。 在本发明的实践中,通过使用编码拟南芥假丝酵母的磷酸核糖氨基咪唑琥珀酰胺合成酶(EC6.3.2.6)的ADE1基因片段,通过与染色体DNA的同源重组构建其中ADE1基因被破坏的酵母菌株 。 在本发明的实践中,通过含有可生物降解的聚酯合酶基因的基因表达盒转化该破坏的菌株,培养得到的转化体,从而生成可生物降解的聚酯。
    • 13. 发明公开
    • PROCESS FOR PRODUCING OPTICALLY ACTIVE AMINO COMPOUNDS
    • Deoxynukleinsäure编码具有立体选择性转氨酶活性,和含有该Deoxynukleinsäure转化的多肽
    • EP0987332A1
    • 2000-03-22
    • EP98914111.4
    • 1998-04-20
    • Kaneka Corporation
    • YAMADA, YukioIWASAKI, AkiraKIZAKI, NoriyukiMATSUMOTO, KeijiIKENAKA, YasuhiroOGURA, MasahiroHASEGAWA, Junzo
    • C12P13/04C12N15/54
    • C12P13/001C12N9/1096
    • A process for efficiently producing optically active amino compounds, mainly (R)-amino compounds, at a low cost by means of a microbial enzyme; a polypeptide suitable for use in the production process and having a stereoselective transaminase activity; and a DNA coding for the polypeptide. The process is characterized by comprising causing a transaminase to act on a ketone compound as an amino acceptor in the presence of a primary amine as an amino donor to stereoselectively transfer the amino group to thus obtain an optically active amino compound. The DNA contains a base sequence coding for a polypeptide having a stereoselective transaminase activity. The polypeptide can be obtained by incubating a microorganism belonging to the genus Arthrobacter .
    • 一种用于有效地制造光学活性氨基化合物,主要(R)的氨基化合物,在通过微生物酶的手段低成本过程; 适合于在生产过程中使用,并且具有立体选择性转氨酶活性的多肽; 和DNA编码的多肽。 该过程由包括使转氨酶在伯胺的存在下在酮化合物作为氨基受体的作为氨基供体的立体选择性地转移的氨基,得到因而光学活性氨基化合物为特征的。 的DNA含有的碱基序列编码具有立体选择性转氨酶活性的多肽。 所述多肽可通过温育属于节杆菌属的微生物来获得。
    • 17. 发明公开
    • METHOD OF COLLECTING HIGHLY PURE POLYHYDROXYALKANOATE FROM MICROBIAL CELLS
    • VERFAHREN ZUR ENTNAHME VON HOCHREINEM POLYHYDROXYALKANOAT AUS MIKROBIELLEN ZELLEN
    • EP1609868A1
    • 2005-12-28
    • EP04703505.0
    • 2004-01-20
    • KANEKA CORPORATION
    • YANAGITA, Yoshifumi 1-701, SaususukueaOGAWA, NorikoUEDA, YasuyoshiOSAKADA, FumioMATSUMOTO, Keiji
    • C12P7/62
    • C12P7/625
    • The present invention has an object to provide a method for separating and purifying a PHA without causing a serious decrease of the molecular weight to obtain a highly pure PHA in a high yield, which comprises efficiently removing cell components other than PHA particles from a cultured PHA-containing microbial cell. Another object of the present invention is to provide a method for obtaining an agglomerate of PHA particles.
      The method for recovering a PHA according to the present invention is a method which comprises efficiently disrupting a cell to recover the PHA by carrying out a physical disruption treatment and an alkali addition at low temperature for an aqueous suspension of the PHA-containing microbial cell, and then treating the PHA with an enzyme and/or a surfactant. Moreover, the particle diameter of the PHA may be enlarged by suspending the PHA in a hydrophilic solvent and/or water, and stirring at a temperature equal to or below the boiling point of said suspension, to agglomerate said PHA.
    • 本发明的目的是提供一种分离纯化PHA的方法,而不会导致分子量的严重降低以获得高产率的高纯度PHA,其包括从培养的PHA有效地除去PHA颗粒以外的细胞成分 含微生物细胞。 本发明的另一个目的是提供一种获得PHA颗粒附聚物的方法。 根据本发明的用于回收PHA的方法是一种方法,其包括通过在低温下进行物理破坏处理和碱添加来有效地破坏细胞以恢复PHA,以获得PHA的水性悬浮液, 含有微生物细胞,然后用酶和/或表面活性剂处理PHA。 此外,通过将PHA悬浮在亲水溶剂和/或水中并在等于或低于所述悬浮液沸点的温度下搅拌以使所述PHA聚集,可以扩大PHA的粒径。