A 5'UTR-spliced mRNA isoform is specialized for enhanced HIV-2 gag translation.
A 5'UTR-spliced mRNA isoform is specialized for enhanced HIV-2 gag translation.
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5UTR 剪接的 mRNA 亚型专门用于增强 HIV-2 gag 翻译。
DOI:
10.1016/j.jmb.2009.06.046
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发表时间:
2009
影响因子:
5.6
通讯作者:
Lodmell,JStephen
中科院分区:
文献类型:
--
作者:
Strong,ChristyL;Lanchy,Jean-Marc;Dieng-Sarr,Abdoulaye;Kanki,PhyllisJ;Lodmell,JStephen
Full-length unspliced genomic RNA plays critical roles in HIV replication, serving both as mRNA for the synthesis of the key viral polyproteins Gag and Gag-Pol and as genomic RNA for encapsidation into assembling viral particles. We show that a second gag mRNA species that differs from the genomic RNA molecule by the absence of an intron in the 5′ untranslated region (5′UTR) is produced during HIV-2 replication in cell culture and in infected patients. We developed a cotransfection system in which epitopically tagged Gag proteins can be traced back to their mRNA origins in the translation pool. We show that a disproportionate amount of Gag is translated from 5′UTR intron-spliced mRNAs, demonstrating a role for the 5′UTR intron in the regulation of gag translation. To further characterize the effects of the HIV-2 5′UTR on translation, we fused wild-type, spliced, or mutant leader RNA constructs to a luciferase reporter gene and assayed their translation in reticulocyte lysates. These assays confirmed that leaders lacking the 5′UTR intron increased translational efficiency compared to that of the unspliced leader. In addition, we found that removal or mutagenesis of the C-box, a pyrimidine-rich sequence located in the 5′UTR intron and previously shown to affect RNA dimerization, also strongly influenced translational efficiency. These results suggest that the splicing of both the 5′UTR intron and the C-box element have key roles in regulation of HIV-2 gag translation in vitro and in vivo.
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DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Nilsen,TW;Wood,DL;Baglioni,C
通讯作者:
Baglioni,C
DOI:
10.1016/0006-291x(82)90647-7
发表时间:
1982
影响因子:
3.1
作者:
P. J. Cayley;M. Knight;I. Kerr
通讯作者:
I. Kerr
DOI:
--
发表时间:
1977
期刊:
European Journal of Biochemistry
影响因子:
--
作者:
E. Adamson;M. Evans;G. Magrane
通讯作者:
G. Magrane
影响因子:
3.7
作者:
M. Aguet;I. Gresser;A. Hovanessian;M. Bandu;B. Blanchard;D. Blangy
通讯作者:
D. Blangy
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Floyd-Smith,G;Yoshie,O;Lengyel,P
通讯作者:
Lengyel,P