Schutz G, Beato M, Feigelson P
Proc Natl Acad Sci U S A. 1973 Apr;70(4):1218-21. doi: 10.1073/pnas.70.4.1218.
Messenger RNA from rat liver was partially purified by chromatography on cellulose on the basis of its poly(A) content. Microgram amounts of this RNA stimulate protein synthesis manyfold in a heterologous cell-free system, derived from Krebs ascites cells supplemented with reticulocyte initiation factors. The messenger RNA directs the initiation, synthesis, and release of a product that was identified as complete subunits of hepatic tryptophan oxygenase (EC 1.13.1.12) by immunoprecipitation with monovalent antibodies prepared against homogeneous tryptophan oxygenase and subsequent sodium dodecyl sulfate-polyacrylamide electrophoresis of the solubilized immunoprecipitate. This may represent the first complete translation in a heterologous system of a mammalian messenger RNA coding for an enzyme protein. Analysis of the messenger RNA content of the liver after glucocorticoid administration demonstrates that the hormonally enhanced rate of synthesis of tryptophan oxygenase is accompanied by an increased quantity of its corresponding messenger RNA.
大鼠肝脏的信使核糖核酸(mRNA)基于其聚腺苷酸(poly(A))含量,通过在纤维素上进行层析得以部分纯化。微克量的这种RNA能在源自克雷布斯腹水细胞并补充网织红细胞起始因子的异源无细胞体系中,将蛋白质合成刺激许多倍。该信使核糖核酸指导一种产物的起始、合成及释放,通过用针对纯一的色氨酸加氧酶制备的单价抗体进行免疫沉淀,以及随后对溶解的免疫沉淀物进行十二烷基硫酸钠-聚丙烯酰胺凝胶电泳,该产物被鉴定为肝色氨酸加氧酶(EC 1.13.1.12)的完整亚基。这可能代表了在异源体系中首次对编码一种酶蛋白的哺乳动物信使核糖核酸进行完整翻译。对给予糖皮质激素后肝脏信使核糖核酸含量的分析表明,色氨酸加氧酶合成速率的激素增强伴随着其相应信使核糖核酸数量的增加。