Signals for ribosomal frameshifting in the Rous sarcoma virus gag-pol region.

Signals for ribosomal frameshifting in the Rous sarcoma virus gag-pol region.
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DOI:
10.1016/0092-8674(88)90031-1
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发表时间:
1988-11-04
期刊:
影响因子:
64.5
通讯作者:
Varmus HE
Varmus HE
中科院分区:
生物学1区
文献类型:
--
作者:
Jacks T;Madhani HD;Masiarz FR;Varmus HE

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劳斯肉瘤病毒(RSV)的gag-pol蛋白是负责逆转录和整合的酶的前体,通过核糖体移码由位于不同翻译阅读框中的两个基因表达。在这里,我们定位移码的网站,并表明移码反应是由两个相邻的tRNA的滑动由一个核苷酸在5′方向介导的。移码不需要紧跟在移码位点之后的gag终止子。当置于RSV gag末端时,其他疑似逆转录病毒移码位点介导移码。RSV pol中的突变也影响体外gag-pol蛋白的合成。这些突变的影响与在移码位点附近形成RNA茎环结构的潜力最相关。RSV RNA的短序列,长度为147个核苷酸,含有移码位点和茎环结构,足以在新的遗传背景下指导移码。
The gag-pol protein of Rous sarcoma virus (RSV), the precursor to the enzymes responsible for reverse transcription and integration, is expressed from two genes that lie in different translational reading frames by ribosomal frameshifting. Here, we localize the site of frameshifting and show that the frameshifting reaction is mediated by slippage of two adjacent tRNAs by a single nucleotide in the 5′ direction. The gag terminator, which immediately follows the frameshift site, is not required for frameshifting. Other suspected retroviral frameshift sites mediate frameshifting when placed at the end of RSV gag. Mutations in RSV pol also affect synthesis of the gag-pol protein in vitro. The effects of these mutations best correlate with the potential to form an RNA stem-loop structure adjacent to the frameshift site. A short sequence of RSV RNA, 147 nucleotides in length, containing the frameshift site and stem-loop structure, is sufficient to direct frameshifting in a novel genetic context.
DOI: 10.1073/pnas.82.11.3616
发表时间: 1985-01-01
影响因子: 11.1
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DOI: 10.1073/pnas.80.23.7065
发表时间: 1983-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
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