Position of the kissing-loop interaction associated with PTE-type 3'CITEs can affect enhancement of cap-independent translation.

Position of the kissing-loop interaction associated with PTE-type 3'CITEs can affect enhancement of cap-independent translation.
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DOI:
10.1016/j.virol.2014.03.027
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发表时间:
2014-06
期刊:
影响因子:
3.7
通讯作者:
Simon, Anne E.
Simon, Anne E.
中科院分区:
医学3区
文献类型:
--
作者:
Chattopadhyay, Maitreyi;Kuhlmann, Micki M.;Kumar, Kalyani;Simon, Anne E.

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黍花叶病毒样翻译增强子(PTE)作为帽非依赖性翻译增强子(3 'CITE)在几个番茄丛矮病毒科属的成员中发挥功能,包括7/19卡莫病毒。对于几乎所有PTE,吻环将元件与在基因组RNA(5'末端发夹或距离5'末端约100 nt)和小亚基因组RNA(距离5 '末端约63 nt)中的几个保守位置中发现的发夹连接。使用Saguaro仙人掌病毒(SCV)序列将相互作用移近报告基因mRNA的5 '端对翻译具有最小或实质性的负面影响。对接环从位置104移动到SCV 5'末端发夹也使翻译减少4倍。这些结果表明,与大麦黄矮BTE和番茄丛矮病毒Y形3 'CITE的结果相反,将PTE吻环重新定位为更靠近5'端降低了PTE效率,这表明不同的3 'CITE具有不同的桥接要求。
The Panicum mosaic virus-like translation enhancer (PTE) functions as a cap-independent translation enhancer (3’CITE) in members of several Tombusviridae genera including 7/19 carmoviruses. For nearly all PTE, a kissing-loop connects the element with a hairpin found in several conserved locations in the genomic RNA (5’ terminal hairpin or ~100 nt from the 5’end) and small subgenomic RNA (~63 nt from the 5’end). Moving the interaction closer to the 5’end in reporter mRNAs using Saguaro cactus virus (SCV) sequences had either a minimal or substantial negative effect on translation. Movement of the kissing loop from position 104 to the SCV 5’ terminal hairpin also reduced translation by 4-fold. These results suggest that relocating the PTE kissing loop closer to the 5’end reduces PTE efficiency, in contrast to results for the Barley yellow dwarf BTE and Tomato bushy stunt virus Y-shaped 3’CITEs , suggesting that different 3’CITEs have different bridging requirements.
DOI: 10.1128/jvi.69.9.5754-5762.1995
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