Biosynthesis of Streptomycin. Purification and Properties of a dTDP-l-Dihydrostreptose: Streptidine-6-phosphate Dihydrostreptosyltransferase from Streptomyces griseus
作者:Bernhard KNIEP、Hans GRISEBACH
DOI:10.1111/j.1432-1033.1980.tb04483.x
日期:1980.3
transferase is dependent on Mn2+ or Mg2+ ions. Co2+ is as effective as Mg2+. From the substrates tested only streptidine 6-phosphate was an acceptor for dihydrostreptose in the synthesis of O-alpha-L-dihydrostreptose(1 leads to 4)-streptidine 6-phosphate. No activity was found with streptidine, 2-deoxystreptamine and 4-deoxy-streptamine. The activity of the transferase in the course of fermentation runs
dTDP-L-二氢链糖:链霉菌素生物合成中涉及的一种酶-链霉菌素-6-磷酸二氢链糖基转移酶已通过六步法从链霉菌中纯化出来,从链霉菌中纯化到近乎同质,该方法涉及在链霉菌素-6-磷酸酯-Sepharose上进行色谱分离。通过凝胶过滤,发现该酶的表观Mr为约63000。在十二烷基硫酸钠凝胶上发现的亚基Mr为约35000。转移酶取决于Mn 2+或Mg 2+离子。Co2 +与Mg2 +一样有效。从测试的底物来看,在合成O-α-L-二氢链糖(1导致4)-链磷酸6-磷酸酯时,只有磷酸6-磷酸链烷酯是二氢链糖的受体。链烷,2-脱氧链胺和4-脱氧链胺均未发现活性。