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首页> 外文期刊>Journal of King Saud University >Biochemical and molecular characterization of lactase producing bacterium isolated from dairy effluent
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Biochemical and molecular characterization of lactase producing bacterium isolated from dairy effluent

机译:乳制品水流分离的乳糖酶产生细菌的生化和分子特征

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In the present study, the microbial source for potent lactase producers was explored to supplement the lactase intolerant individuals. Dairy effluent was screened for lactase producing bacteria by conventional microbiological methods. Among the positive isolates, one isolate VUVD001 was found to be a strong producer of lactase enzyme and this strain identified by 16S rDNA analysis. The lactase producing bacterium is identified asBacillus subtilisby biochemical and 16S rDNA analysis. The VUVD001 strain found to survive in a temperature range of 20–55?°C, pH range of 5–8 and a salt concentration up to 8%. Further, the partially purified enzyme preparation was tested by zymogram analysis for activity testing using x-gal and the enzyme activity of cell free supernatant was estimated to be 15.10?U/ml at 37?°C, 4% NaCl and pH of 7.0. Our finding reports a new isolateBacillus subtilisVUVD001 strain which can be used as potential strain for commercial production of lactase.
机译:在本研究中,探讨了有效的乳糖酶生产商的微生物来源,以补充乳糖酶的不宽容性的个体。通过常规微生物方法筛选乳制品筛选乳糖酶产生细菌。在阳性分离物中,发现一种分离物Vuvd001是乳糖酶酶的强生产者,并通过16S rDNA分析鉴定该菌株。产生的乳糖酶产生的细菌被鉴定为枯草芽孢杆菌和16S rDNA分析。发现VUVD001菌株在20-55℃,pH范围为5-8的温度范围内存活,盐浓度高达8%。此外,通过Zymogrep分析测试部分纯化的酶制剂,用于使用X-GAL进行活性测试,并且估计细胞上清液的酶活性为15.10℃,37℃,4%NaCl和pH为7.0。我们的发现报道了一种新的嗜胞菌枯草芽孢杆菌菌株,可作为乳糖酶商业生产的潜在应变。

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