Activation of a cryptic TACTAAC box in the Saccharomyces cerevisiae actin intron.

Activation of a cryptic TACTAAC box in the Saccharomyces cerevisiae actin intron.
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酿酒酵母肌动蛋白内含子中神秘 TACTAAC 盒的激活。

DOI:
10.1128/mcb.6.5.1571-1578.1986
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发表时间:
1986
影响因子:
5.3
通讯作者:
Rossi,J
Rossi,J
中科院分区:
生物学2区
文献类型:
--
作者:
Cellini,A;Parker,R;McMahon,J;Guthrie,C;Rossi,J

文献摘要

相似文献

我们构建了酿酒酵母肌动蛋白基因和大肠杆菌β-半乳糖苷酶结构基因之间的翻译融合,使得β-半乳糖苷酶活性的表达需要肌动蛋白内含子的精确剪接。使用这个嵌合基因,我们产生了一系列内部缺失,去除了 TACTAAC 盒,或者此外,还去除了内含子内的 TACTAAC 样序列。对这些缺失中产生的融合转录本的分析使我们得出结论,TACTAAC 样序列 TACTAAG 可以在剪接过程中替代真正的 TACTAAC 盒,尽管效率较低。这些结果表明酵母剪接机制可以利用神秘的 TACTAAC 盒,但对一级序列和正确位置有要求。
We constructed a translational fusion between theSaccharomyces cerevisiaeactin gene and theEscherichia coliβ-galactosidase structural gene such that expression of beta-galactosidase activity required accurate splicing of the actin intron. Using this chimeric gene, we generated a series of internal deletions which removed the TACTAAC box or, in addition, TACTAAC-like sequences within the intron. Analysis of the fusion transcripts produced in these deletions allowed us to conclude that the TACTAAC-like sequence TACTAAG can substitute, albeit inefficiently, for the authentic TACTAAC box in the splicing process. These results indicate that the yeast splicing machinery can utilize a cryptic TACTAAC box, but there are requirements for primary sequence and proper position.