Polyester synthase gene and process for producing polyester
    24.
    发明授权
    Polyester synthase gene and process for producing polyester 失效
    聚酯合酶基因及生产聚酯的方法

    公开(公告)号:US5981257A

    公开(公告)日:1999-11-09

    申请号:US910856

    申请日:1997-08-13

    CPC classification number: C12N9/93 C12N9/88 C12P7/625

    Abstract: The present invention relates to a polyester synthase gene coding for a polypeptide containing the amino acid sequence of SEQ ID NO:2 or a sequence where in the amino acid sequence of SEQ ID NO:2, one or more amino acids are deleted, replaced or added, the polypeptide bringing about polyester synthase activity; a gene expression cassette comprising the polyester synthase gene and either of open reading frames located upstream and downstream of the gene; a recombinant vector comprising the gene expression cassette; a transformant transformed with the recombinant vector; and a process for producing polyester by culturing the transformant in a medium and recovering polyester from the resulting culture.

    Abstract translation: 本发明涉及编码含有SEQ ID NO:2的氨基酸序列的多肽的聚酯合成酶基因,或其中在SEQ ID NO:2的氨基酸序列中缺失一个或多个氨基酸,替换或 多肽引起聚酯合酶活性; 一种基因表达盒,其包含聚合酶合酶基因和位于该基因上游和下游的开放阅读框; 包含该基因表达盒的重组载体; 用重组载体转化的转化体; 以及通过在培养基中培养转化体并从所得培养物中回收聚酯来生产聚酯的方法。

    Process for the microbiological production of pha-polymers
    26.
    发明授权
    Process for the microbiological production of pha-polymers 失效
    聚合物微生物生产工艺

    公开(公告)号:US5871980A

    公开(公告)日:1999-02-16

    申请号:US894347

    申请日:1997-12-01

    CPC classification number: C12P7/625 Y10S435/829

    Abstract: A process for producing poly-3-hydroxyalkanoate (PHA) by culturing Alcaligenes on a low water-solubility aliphatic carboxylic acid and, or hydrolysable derivative of low solubility in pure water, by fermenting the organism in a growth step on a nutrient medium containing inter alia phosphorus in a quantity corresponding to the intended quantity of bacterial cells to be grown until cell growth stops or slows substantially, then in a PHA accumulation stage fermenting the grown cells by feeding said low-solubility carbon source while monitoring pH and adjusting it by addition of ammonia and/or alkaline alkali metal compound until a design quantity of PHA has been produced, and recovering PHA from the product. Further phosphorus may be fed to the accumulation stage at a rate sufficient to permit some bacterial growth but insufficient to permit growth to the exclusion of PHA accumulation. The over-all carbon (as C) to phosphorus (as P) weight ratio is typically in the range 40-100 in the growth stage and 300 to 600 in the accumulation stage.

    Abstract translation: PCT No.PCT / GB96 / 00293 Sec。 371 1997年12月1日第 102(e)1997年12月1日PCT PCT 1996年2月9日PCT公布。 公开号WO96 / 25509 日期1996年8月22日通过在低水溶性脂肪族羧酸和/或纯水中溶解度低的可水解衍生物,通过在生长步骤中发酵生物体来培养产生嗜碱性杆菌的方法,生产聚-3-羟基链烷酸酯(PHA) 一种营养培养基,其特别是磷,其量相当于要生长直到细胞生长的细菌细胞的预期量的数量,直到细胞生长停止或显着减慢,然后在PHA积累阶段,通过在监测pH值的同时喂养所述低溶解度碳源来发酵生长的细胞 并通过加入氨和/或碱性碱金属化合物进行调整,直到产生PHA的设计量,并从产品中回收PHA。 进一步的磷可以以足以允许一些细菌生长但不足以允许生长排除PHA积累的速率进料到积聚阶段。 所有碳(如C)至磷(P)重量比通常在生长阶段的40-100范围内,在积累阶段通常为300至600。

    Enzyme and its use in preparing (S)-pipecolic acid
    27.
    发明授权
    Enzyme and its use in preparing (S)-pipecolic acid 失效
    酶及其在制备(S) - 十二酸中的用途

    公开(公告)号:US5733754A

    公开(公告)日:1998-03-31

    申请号:US615193

    申请日:1996-04-08

    CPC classification number: C12R1/05 C12N9/80 C12P17/12 C12P41/007

    Abstract: An enzyme is provided which has acylase activity capable of hydrolyzing N-acetyl-(R,S)-pipecolic acid stereoselectively to give (S)-pipecolic acid, wherein this activity is greater than that on N-acetyl-S-proline, at pH 7.5, 25.degree. C., and substrate concentration 20 g/l, in 75 mM Tris buffer. The enzyme is obtainable from the species of Alcaligenes denitrificans deposited as NCIMB 40587. A microorganism having therein the enzyme also is provided, as is a process for preparing (S)-pipecolic acid comprising contacting a mixture of enantiomers of an N-acyl-pipe colic acid with the enzyme or microorganism.

    Abstract translation: PCT No.PCT / GB94 / 02259 Sec。 371日期:1996年4月8日 102(e)日期1996年4月8日PCT 1994年10月14日PCT PCT。 公开号WO95 / 10604 日期1995年4月20日提供具有能够立体选择性水解N-乙酰基 - (R,S) - 十二酸的酰基转移酶活性的酶,得到(S) - 十二酸,其中该活性大于N-乙酰基 - S-脯氨酸,pH 7.5,25℃,底物浓度20g / l,在75mM Tris缓冲液中。 该酶可从作为NCIMB 40587沉积的嗜碱性杆菌属物种获得。还提供了其中还含有该酶的微生物,制备(S) - 癸二酸的方法包括使N-酰基管的对映异构体的混合物 肠酸与酶或微生物。

    Transesterification method using lipase powder with a particle diameter
of 20-50 microns
    28.
    发明授权
    Transesterification method using lipase powder with a particle diameter of 20-50 microns 失效
    使用粒径为20-50微米的脂肪酶粉末的酯交换方法

    公开(公告)号:US5480787A

    公开(公告)日:1996-01-02

    申请号:US296921

    申请日:1994-08-31

    CPC classification number: C12P7/6454 C12N11/14

    Abstract: The transesterification method is conducted with a powdery lipase wherein the powdery lipase is dispersed in ester-containing starting materials in the presence or absence of an inert organic solvent, and the diameter of at least 90% of the dispersed lipase particles is kept in the range of 1 to 100 .mu.m in the course of the trans-esterification reaction. A reactivity higher than that realized by the conventional transesterification method with a powdery lipase is obtained and the lipase can be easily recovered and reused, without causing a loss of the lipase activity, lowering of the conversion due to the residence of the substrate on the immobilizing carrier and side reactions caused by water introduced into the reaction system by the immobilizing carrier.

    Abstract translation: 酯交换方法用粉状脂肪酶进行,其中在存在或不存在惰性有机溶剂的情况下将粉状脂肪酶分散在含酯原料中,并且至少90%的分散的脂肪酶颗粒的直径保持在 在反式酯化反应过程中为1〜100微米。 获得比通过常规酯交换法用粉末脂肪酶实现的更高的反应性,并且可以容易地回收和再利用脂肪酶,而不会引起脂肪酶活性的丧失,由于底物停留在固定化上的转化率降低 由固定载体引入反应体系的水引起的载体和副反应。

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