Analysis of Template Variations on RNA Synthesis by Respiratory Syncytial Virus Polymerase.

Analysis of Template Variations on RNA Synthesis by Respiratory Syncytial Virus Polymerase.
复制标题

DOI:
10.3390/v15010047
复制
发表时间:
2022-12-23
期刊:
Viruses
影响因子:
--
通讯作者:
--
中科院分区:
其他
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

呼吸道合胞病毒(RSV)是全球婴儿和老年人的重大威胁。目前,由于对RSV病毒机制的了解不足,因此没有针对RSV感染的有效疗法或治疗。在这项研究中,我们研究了模板的变化对RNA合成的RSV聚合酶通过在体外RNA合成试验的影响。我们证实了先前报道的RSV聚合酶的反向引发活性,这可能是由于RNA模板的二级结构。我们发现RNA模板的发夹环大小的扩大消除了RSV聚合酶的反向引发活性。同时,它似乎不影响RSV聚合酶的从头RNA合成活性。有趣的是,我们的研究结果表明,RSV聚合酶也有一个新的基于引物的末端延伸活性,以非特异性的方式添加核苷酸的模板和引物。我们还绘制了RNA 5′化学基团对其在尿素变性RNA凝胶迁移试验中的迁移率的影响。总的来说,这些结果增强了我们对RSV聚合酶的RNA合成过程的了解,并可能指导未来的治疗工作,以开发有效的抗病毒药物用于RSV治疗。
Respiratory syncytial virus (RSV) is a significant threat to infants and elderly individuals globally. Currently, there are no effective therapies or treatments for RSV infection because of an insufficient understanding of the RSV viral machinery. In this study, we investigated the effects of the template variations on RNA synthesis by the RSV polymerase through in vitro RNA synthesis assays. We confirmed the previously reported back-priming activity of the RSV polymerase, which is likely due to the secondary structure of the RNA template. We found that the expansion of the hairpin loop size of the RNA template abolishes the RSV polymerase back-priming activity. At the same time, it seemingly does not affect the de novo RNA synthesis activities of the RSV polymerase. Interestingly, our results show that the RSV polymerase also has a new primer-based terminal extension activity that adds nucleotides to the template and primer in a nonspecific manner. We also mapped the impact of the RNA 5′ chemical group on its mobility in a urea-denaturing RNA gel shift assay. Overall, these results enhance our knowledge about the RNA synthesis processes of the RSV polymerase and may guide future therapeutic efforts to develop effective antiviral drugs for RSV treatment.
DOI: 10.1016/s0140-6736(22)00478-0
发表时间: 2022-05-28
期刊: Lancet (London, England)
影响因子: --
作者:
Li Y;Wang X;Blau DM;Caballero MT;Feikin DR;Gill CJ;Madhi SA;Omer SB;Simões EAF;Campbell H;Pariente AB;Bardach D;Bassat Q;Casalegno JS;Chakhunashvili G;Crawford N;Danilenko D;Do LAH;Echavarria M;Gentile A;Gordon A;Heikkinen T;Huang QS;Jullien S;Krishnan A;Lopez EL;Markić J;Mira-Iglesias A;Moore HC;Moyes J;Mwananyanda L;Nokes DJ;Noordeen F;Obodai E;Palani N;Romero C;Salimi V;Satav A;Seo E;Shchomak Z;Singleton R;Stolyarov K;Stoszek SK;von Gottberg A;Wurzel D;Yoshida LM;Yung CF;Zar HJ;Respiratory Virus Global Epidemiology Network;Nair H;RESCEU investigators
通讯作者: RESCEU investigators
DOI: 10.1016/j.bcp.2016.09.014
发表时间: 2017-03-01
影响因子: 5.8
作者:
Heylen, Elisabeth;Neyts, Johan;Jochmans, Dirk
通讯作者: Jochmans, Dirk
DOI: 10.1073/pnas.1016759108
发表时间: 2011-04-26
影响因子: 11.1
作者:
Martin, Arnold;Hoefs, Nadja;Schneider, Urs
通讯作者: Schneider, Urs
DOI: 10.1021/bi980758j
发表时间: 1998-08-25
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Jang, SB;Hung, LW;Holbrook, SR
通讯作者: Holbrook, SR
DOI: 10.1128/jvi.74.13.6006-6014.2000
发表时间: 2000-07-01
影响因子: 5.4
作者:
Fearns, R;Collins, PL;Peeples, ME
通讯作者: Peeples, ME