Optimization and immobilization of urease enzyme isolated from Proteus mirabilis on alginate beads

被引：1

作者：

Tetiker, A. T. ^{[1
]}

Ertan, F. ^{[2
]}

机构：

[1] Istanbul Rumeli Univ, Vocat Coll Hlth Serv, TR-34570 Istanbul, Turkey

[2] Trakya Univ, Dept Biol, Fac Sci, TR-22030 Edirne, Turkey

来源：

JOURNAL OF ENVIRONMENTAL BIOLOGY | 2019年 / 40卷 / 05期

关键词：

Alginate; Immobilization; Proteus mirabilis; Urease; ALPHA-AMYLASE;

D O I：

10.22438/jeb/40/5/PRN-f18

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Urease enzyme was isolated from Proteus mirabilis and immobilized in alginate beads. Various parameters such as optimum pH, optimum temperature, pH stability, thermal stability, reusability, storage stability and substrate concentration were investigated and the findings were compared with free urease enzyme. immobilization yield was calculated as 85 %. Optimum temperature was found to be 40 degrees C for free and immobilized urease. Thermal stability of the immobilized urease enzyme was significantly better than the free enzyme. Optimum pH for free and immobilized urease was be 7.0. Immobilized and free urease enzymes protected their stability at pH 7.0 and 8.0 in a similar way. Immobilized enzyme maintained 55% of their initial activity after 12 repeated use of enzyme. It was found that storage stability of immobilized enzyme was better than that of free enzyme. K-m and V-max values from the Lineweaver-Burk plots were calculated.

引用

页码：1123 / 1128

页数：6

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