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β-呋喃果糖苷酶在离子液体中的酶学特性研究

作  者:
马歌丽;韩甜甜;李全喜;魏涛;毛多斌
单  位:
郑州轻工业学院食品与生物工程学院
关键词:
β-呋喃果糖苷酶;离子液体;酶学特性
摘  要:
对β-呋喃果糖苷酶在离子液体中的酶学特性进行了探索。结果表明:与水相对比,β-呋喃果糖苷酶在疏水性离子液体[BMIM][PF6]中的酶催化活性提高了89.3%,而在亲水性离子液体[BMIM][BF4]中的酶催化活性降低了46.2%。在50%(V/V)[BMIM][PF6]中,β-呋喃果糖苷酶的最适作用条件是:蔗糖的浓度为60%,温度为40℃,pH值为5.2,酶在30~50℃及pH值4.5~6.5范围内稳定性较好。酶促反应动力学研究表明,疏水性离子液体[BMIM][PF6]的存在增强了β-呋喃果糖苷酶和底物的亲和能力,有利于提高β-呋喃果糖苷酶的转移活性。
译  名:
Enzymatic properties of β-fructofuranosidase in ionic liquid
作  者:
Ma Geli;Han Tiantian;Li Quanxi;Wei Tao;Mao Duobin;
关键词:
β-fructofuranosidase;;ionic liquid;;enzymatic properties
摘  要:
The enzymatic properties of β-fructofuranosidase in ionic liquid were explored. The main re-seach results were as follows: Compared with the aqueous phase, enzyme catalytic activity of β-fructo-furanosidase increased by 89.3% in hydrophobic ionic liquid [BMIM][PF6] and decreased by 46.2% inthe hydrophilic ionic liquid [BMIM][BF4]. In 50% [BMIM][PF6], the optimum concentration of sucrosewas 60%, the optimum temperature of β-fructofuranosidaseis was 40 ℃, the optimum pH was 5.2, theenzyme was stable at 30~50 ℃ and pH 4.5~6.5. Enzymatic reaction kinetics studies showed that ionicliquid [BMIM][PF6] enhanced affinity of β-fructofuranosidase and substrate, which was conducive toimprove the transglycosylation activity of β-fructofuranosidase.

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