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大豆磷酸烯醇式丙酮酸磷酸酯酶研究 Ⅲ、非专一性酸性磷酸酯酶的纯化与特性
董登峰;杨杰;江立庚;陈念平
1.广西大学农学院;2.广西大学农学院 广西南宁530005;3.广西南宁530005
摘要:
从大豆叶片中分离能水解磷酸烯醇式丙酮酸(PEP)的酸性磷酸酯酶,通过硫酸胺分部(20%~50%饱和度)沉淀、DEAE纤维素层析、刀豆球蛋白琼脂糖凝胶亲和层析将酶纯化了422.47倍,活性达78.16U/mg蛋白。该酶对PEP专一性不强,Km为1.09mmol/L(PEP),最适pH5.8,在pH4.8~7.0范围内及60℃以下较稳定,水解PEP的活性被Mg2+、Mn2+激活,F、Cu2+、Zn2+、PO43、MoO42及3磷酸甘油酸(3PGA)、三磷酸腺苷ATP等代谢物抑制,受异柠檬酸等有机酸影响较小。
关键词:  大豆    非专一性酸性磷酸酯酶    纯化    特性
DOI:
分类号:
Fund project:国家自然科学基金(30070453);; 广西大学博士启动基金(DD160008)~~
Abstract:
Key words:  
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