Huez G, Marbaix G, Hubert E, Leclercq M, Nudel U, Soreq H, Salomon R, Lebleu B, Revel M, Littauer U Z
Proc Natl Acad Sci U S A. 1974 Aug;71(8):3143-6. doi: 10.1073/pnas.71.8.3143.
The translations of native messenger RNA for rabbit globin and that of poly(A)-free globin messenger RNA have been compared after injection into Xenopus oocytes. The initial rate of translation of poly(A)-free mRNA is close to that found with intact mRNA. However, at longer incubation periods, the rate of globin synthesis with poly(A)-free mRNA is considerably lower than with native mRNA. Similar differences in the template activity of the two mRNA preparations were found with a cell-free extract of Krebs II ascites tumor. It is concluded that the presence of the 3' poly(A)-rich sequence in mRNA is required to ensure high functional stability.
将兔珠蛋白的天然信使核糖核酸(mRNA)和无聚腺苷酸(poly(A))的珠蛋白信使核糖核酸注射到非洲爪蟾卵母细胞后,对二者的翻译情况进行了比较。无聚腺苷酸mRNA的初始翻译速率与完整mRNA的翻译速率相近。然而,在较长的孵育期,无聚腺苷酸mRNA的珠蛋白合成速率明显低于天然mRNA。在克雷布斯II腹水瘤细胞的无细胞提取物中,也发现了这两种mRNA制剂在模板活性上的类似差异。由此得出结论,mRNA中3'富含聚腺苷酸序列的存在是确保高功能稳定性所必需的。