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    • 4. 发明授权
    • L-glutamic acid oxidase (H.sub.2 O.sub.2 -generating), its production
and analytical method therefor
    • L-谷氨酸氧化酶(H2O2生成),其生产和分析方法
    • US4605615A
    • 1986-08-12
    • US472174
    • 1983-03-02
    • Hidehiko IshikawaHideo MisakiNaoki Muto
    • Hidehiko IshikawaHideo MisakiNaoki Muto
    • C12N9/52C12N9/02C12N9/06C12Q1/26C12R1/465C12Q1/52C12Q1/36
    • C12N9/0022C12Q1/26Y10S435/886
    • L-glutamic acid oxidase having the following biochemical properties:(a) substrate specificity: L-glutamic acid,(b) enzyme action: catalyzes a reaction which forms one mole of .alpha.-ketoglutaric acid, one mole of ammonia and one mole of hydrogen peroxide from one mole of L-glutamic acid, one mole of oxygen and one mole of water, as follows: ##STR1## This oxidase is produced by culturing microorganisms belonging to genus Streptomyces in a nutrient medium and isolating the thus-produced L-glutamic acid oxidase. Particular microorganisms of genus Streptomyces are sp. A7700 FERM P-6241 (NRRL No. 15267) and sp. 8063 FERM P-6242 (NRRL No. 15268). The oxidase can be used for detecting L-glutamic acid or L-glutamate, in an aqueous sample, because it catalyzes a reaction which forms one mole of .alpha.-ketoglutaric acid, one mole of ammonia and one mole of hydrogen peroxide from one mole of glutamic acid, one mole of oxygen and one mole of water. Thus, the consumed oxygen can be quantitatively determined, or the generated .alpha.-glutaric acid or ammonia or hydrogen peroxide can be quantitatively determined.
    • 具有以下生物化学性质的L-谷氨酸氧化酶:(a)底物特异性:L-谷氨酸,(b)酶作用:催化形成1摩尔α-酮戊二酸,1摩尔氨和1摩尔氢的反应 1摩尔L-谷氨酸,1摩尔氧和1摩尔水的过氧化物如下:该氧化酶是通过在营养培养基中培养属于链霉菌属的微生物而产生的,并分离由此产生的 L-谷氨酸氧化酶。 链霉菌属的特殊微生物是sp。 A7700 FERM P-6241(NRRL No. 15267)和sp。 8063 FERM P-6242(NRRL No. 15268)。 氧化酶可用于检测水样品中的L-谷氨酸或L-谷氨酸,因为它催化反应,其形成1摩尔α-酮戊二酸,1摩尔氨和1摩尔过氧化氢从1摩尔 谷氨酸,1摩尔氧和1摩尔水。 因此,可以定量测定消耗的氧气,或者可以定量测定产生的α-戊二酸或氨或过氧化氢。