机构地区: 广西大学生命科学与技术学院广西亚热带生物资源保护利用重点实验室
出 处: 《化工学报》 2006年第12期2938-2942,共5页
摘 要: 1,3-丙二醇(1,3-propanediol,1,3-PD)是一种重要的化工和医药中间体原料,是良好的溶剂、抗冻剂或保护剂,是聚酯——聚对苯二甲酸丙二醇酯(PTT)和聚氨酯的单体,可在地毯、纺织、工程塑料等领域中广泛应用,也可用于食品、化妆品和制药等行业食品.当前化工合成是生产1,3-丙二醇的主要方法, Diol dehydratase of Lactobacillus diolivorans was purified by ammonium sulfate precipitation and gel filtration chromatography. The molecular mass of the native complex was estimated to be 200× 10^3 by nondenaturing polyacrylamide gel electrophoresis. Three main bands were present after SDS-PAGE with molecular masses of 62 × 10^3 , 35 × 10^3 and 22×10^3 , respectively. Km for the three main substrates were 1.3 mmol· L^-1 for 1,2-propanediol, 5.8 mmol ·L^-1 for glycerol and 10.3 mmol·L^-1 for 1, 2- ethanediol. Km for adenosylcobalamin coenzyme was 1.5 μmol·L^-1, which was required for the enzyme catalysis. The optimal reaction conditions of the enzyme were pH 8. 6 and 37℃.
领 域: [生物学]