壳聚糖固定化真菌漆酶及其用于处理酚类污染物的研究

被引:28
作者
肖亚中
张书祥
胡乔彦
江维
蒲春雷
施蕴渝
机构
[1] 中国科学技术大学中国科学院结构生物学开放实验室
[2] 安徽大学生命科学学院
[3] 中国科学技术大学中国科学院结构生物学开放实验室 合肥安徽大学生命科学学院合肥
[4] 合肥
关键词
壳聚糖; 固定化; 真菌漆酶; 酚类污染物;
D O I
10.13343/j.cnki.wsxb.2003.02.016
中图分类号
Q939.9 [应用微生物学];
学科分类号
071005 ; 100705 ;
摘要
Trametessp.AH2 8 2在液体培养条件下经邻甲苯胺诱导能有效合成漆酶同工酶A。以壳聚糖为载体 ,戊二醛为交联剂进行了漆酶A的固定化研究 ,确定酶固定化适宜条件为 :0 1g壳聚糖与 1 5mL 5 %戊二醛交联 8h后 ,加入 30 0U酶固定 1 2h。在此条件下获得的固定化漆酶催化能力为 1 76 4U g载体 ,酶活回收率 5 8 5 %。与游离酶相比 ,固定化漆酶与作用底物愈创木酚的亲和力降低 ,但固定化酶的稳定性有明显改善。固定化漆酶的最适温度为5 5℃ ,比游离酶提高 5℃ ;70℃条件下保温 8h ,固定化酶保留酶活 5 6 5 % ,而在相同条件下游离酶酶活明显下降。使用固定化漆酶反应装置进行酚类化合物转化实验 ,连续进行 1 2批次操作 ,固定化酶酶活仍保持 60 %以上 ,漆酶使用效率明显提高
引用
收藏
页码:245 / 250
页数:6
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