Properties of phytase from Aspergillus oryzae093

摘要：

Optimal condition,stability and Km of phytase which was from Aspergillus oryzae093 were studied.The optimal temperature and pH for sodium-phytate hydrolysis by Aspergillus oryzae093 phytase is 50℃ and 5.5 respectively.Phytase has better heat stability as temperature below 45℃.The phytase activity remained 90％ when pH is 5.0 to 6.0.Low concentration Fe2+ and Mg2+ can promote phytase activity,while Cu2+,Mn2+,Fe3+,Al3+ or high concentration Fe2+ and Mg2+ can inhibite the activity of phytase.The Km is about 4.8×l0-5 mol·L-1 when sodium phytate as substrate.The enzyme properties of Aspergillus oryzae093 phytase make it could apply to food and feed to reduce the phosphorus exhausted to environment.

关键词： Aspergillus oryzae093 phytase enzyme properties

作者: Zhang Na Li Xiaomei Guo Qingqi

作者单位: College of Food Engineering,Harbin University of Commerce,Harbin,China College of Forestry,Northeast Forestry University,Harbin,China

会议类型: 国际会议

会议名称: 2010 International Conference of Environment Materials and Environment Management(2010年环境材料与环境管理国际学术会议 EMEM 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 1833-1836

在线出版日期: 2010-07-24（万方平台首次上网日期，不代表论文的发表时间）