食品科学 ›› 2010, Vol. 31 ›› Issue (17 ): 224-227.doi: 10.7506/spkx1002-6630-201017050

• 生物工程 • 上一篇    下一篇

云芝(Coriolus versicolor)木质素过氧化物酶(LiP)酶学性质分析

金 剑,康文丽,生吉萍,程凡升,王权帅,张焱鑫,张国鹏,申 琳*   

  1. 中国农业大学食品科学与营养工程学院
  • 收稿日期:2010-03-31 出版日期:2010-09-15 发布日期:2010-12-29
  • 通讯作者: 申 琳 E-mail:pingshen@cau.edu.cn
  • 基金资助:

    教育部大学生科学研究与创业计划建设项目;国家公益性行业(农业)科技项目(200803033)

Enzymological Characteristics of Lignin Peroxidase (LiP) from Coriolus versicolor

JIN Jian,KANG Wen-li,SHENG Ji-ping,CHENG Fan-sheng,WANG Quan-shuai,ZHANG Yan-xin,ZHANG Guo-peng,SHEN Lin   

  1. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
  • Received:2010-03-31 Online:2010-09-15 Published:2010-12-29
  • Contact: SHEN Lin E-mail:pingshen@cau.edu.cn

摘要:

研究云芝(Coriolus versicolor)产木质素过氧化物酶(Lip)酶活力随时间的变化情况,以及温度、pH 值、金属离子及化合物对云芝LiP 酶活力和稳定性的影响,对该酶底物浓度效应和Km 值进行测定。结果表明:云芝培养12d,其酶活力最高,为72U/mL。该酶的最适温度为40℃,在30~40℃范围内稳定;最适pH 值为2.5,pH 值在2.0~3.5 较稳定;Zn2+ 对LiP 有激活作用,Na+ 对酶活力没有影响,Ca2+、K+、Mg2+、Mn2+、Cu2+ 及EDTA、SDS、β- 巯基乙醇都表现出抑制作用;Km 值为2.05 × 10-4mol/L。

关键词: 云芝, 木质素过氧化物酶, 温度, pH 值, Km

Abstract:

In this paper, the enzymological characteristics of lignin peroxidase (LiP) from C. versicolor were investigated. The effects of temperature, pH, metal ions and compounds on the activity and stability of the enzyme were explored. Meanwhile, the relationship between substrate concentration and LiP activity was also studied, and the enzyme was measured for its Km. The highest enzyme activity was 72 U/mL when C. versicolor was cultured for up to 12 days. The optimal temperature and pH of the enzyme were 40 ℃ and 2.5, respectively. It exhibited a good stability in a range from 30 to 40 ℃ for temperature and from 2.0 to 3.5 for pH. Its activity could be activated by Zn2+ and inhibited by Ca2+, K+, Mg2+, Mn2+, Cu2+, EDTA, SDS and β-mercaptoethanol, while Na+ had no effect on its activity. The Km of the enzyme was 2.05 × 10-4 mol/L.

Key words: Coriolus versicolor, lignin peroxidase, temperature, pH, Km

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