期刊
BIOTECHNOLOGY LETTERS
卷 33, 期 10, 页码 2057-2063出版社
SPRINGER
DOI: 10.1007/s10529-011-0670-0
关键词
Cu/Zn superoxide dismutase; Superoxide dismutase; Thermostable enzyme; Winter cherry; Withania somnifera L.
资金
- Department of Science and Technology
- CSIR
A gene from Withania somnifera (winter cherry), encoding a highly stable chloroplastic Cu/Zn superoxide dismutase (SOD), was cloned and expressed in Escherichia coli. The recombinant enzyme (specific activity of similar to 4,200 U mg(-1)) was purified and characterized. It retained similar to 90 and similar to 70% residual activities after 1 h at 80 and 95 degrees C, respectively. At 95 degrees C, thermal inactivation rate constant (K-d) of the enzyme was 2.46 9 10(-3) min(-1) and half-life of heat inactivation was 4.68 h. The enzyme was stable against a broad pH range (2.5-11.0). It also showed a high degree of resistance to detergent, ethanol and protease digestion. This recombinant Cu/Zn SOD could therefore have useful applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据