Glucose dehydrogenase and its production
    6.
    发明授权
    Glucose dehydrogenase and its production 失效
    葡萄糖脱氢酶及其生产

    公开(公告)号:US4877733A

    公开(公告)日:1989-10-31

    申请号:US42655

    申请日:1987-04-28

    IPC分类号: C12N9/04

    CPC分类号: C12N9/0006 Y10S435/911

    摘要: Glucose dehydrogenase having the following biochemial properties:(a) enzymatic action: catalyzes a reaction which generates glucono-.delta.-lactone and reduced NADP from glucose and NADP;(b) substrate specificity: has substrate specificity on glucose and no substrate specificity on 2-deoxyglucose;(c) optimum pH: pH 6-8,(d) optimum temperature: approximately 55.degree. C.,(e) pH-stability: stable at pH 6.0-7.5,(f) molecular weight: 11.times.10.sup.4 .+-.11000,(g) Km-value: 2.6.times.10.sup.-3 .+-.2.6.times.10.sup.-4 M(glucose) 4.2.times.10.sup.-6 35 4.2.times.10.sup.-7 M(NADP) and(h) isoelectric point: 4.9.+-.0.5,comprises culturing a glucose dehydrogenase-producing microorganism Cryptococcus uniguttulatus Y 0033 FERM P-8709, now FERM BP-1352 in a nutrient medium and isolating glucose dehydrogenase thus produced from the cultured medium.

    摘要翻译: 具有以下生物化学性质的葡萄糖脱氢酶:(a)酶促作用:催化从葡萄糖和NADP产生葡萄糖酸-δ-内酯和还原的NADP的反应; (b)底物特异性:对葡萄糖具有底物特异性,对2-脱氧葡萄糖没有底物特异性; (c)最适pH:pH 6-8,(d)最适温度:约55℃,(e)pH稳定性:pH 6.0-7.5稳定,(f)分子量:11×10 4 +/- 11000,(g )Km值:2.6×10 -3 +/- 2.6×10 -4 M(葡萄糖)4.2×10-635 4.2×10-7M(NADP)和(h)等电点:4.9 +/- 0.5,包括培养产生葡萄糖脱氢酶 微生物隐球酵母Y 0033 FERM P-8709,现在是营养培养基中的FERM BP-1352,并从培养基中分离出葡萄糖脱氢酶。

    Novel bilirubin oxidase which has a substrate specifity to bilirubin,
but not to biliverdin, catechol and hemin
    10.
    发明授权
    Novel bilirubin oxidase which has a substrate specifity to bilirubin, but not to biliverdin, catechol and hemin 失效
    新型胆红素氧化酶,其具有对胆红素的底物特异性,但不对胆红素,儿茶酚和血红素

    公开(公告)号:US4985360A

    公开(公告)日:1991-01-15

    申请号:US204868

    申请日:1988-06-10

    摘要: A novel bilirubin oxidase is provided having a substrate specificity for bilirubin but not to, at least, biliverdin, catechol and hemin and which catalyzes the enzyme reaction between two moles of bilirubin and one mole of oxygen to yield two moles of biliverdin and two moles of water. A process is also provided for the production of said novel bilirubin oxidase, which comprises cultivating a bilirubin oxidase-producing fungus of the genus Penicillium in a culture medium and collecting the bilirubin oxidase from the culture mixture. A method of determining the content of bilirubin in a sample to be analyzed is further provided which comprises contacting the sample with the bilirubin oxidase to convert bilirubin in the sample into biliverdin and determining the amount of biliverdin formed or the amount of oxygen consumed therefor, as well as a method for removing bilirubin contained in a sample to be analyzed, which comprises contacting the sample with said novel bilirubin oxidase.