Replacement of the heterologous 5 ' untranslated region allows preservation of the fully functional activities of type 2 porcine reproductive and respiratory syndrome virus
文献类型: 外文期刊
第一作者: Gao, Fei
作者: Gao, Fei;Lu, Jiaqi;Wei, Zuzhang;Zheng, Haihong;Zhuang, Jinshan;Tong, Guangzhi;Yuan, Shishan;Yao, Huochun
作者机构:
关键词: PRRSV;5 ' UTR;Chimeric clone;Stem-loop structure
期刊名称:VIROLOGY ( 影响因子:3.616; 五年影响因子:3.967 )
ISSN: 0042-6822
年卷期: 2013 年 439 卷 1 期
页码:
收录情况: SCI
摘要: The 5' untranslated region (UTR) is believed to be vital for the replication of porcine reproductive and respiratory syndrome virus (PRRSV), yet its functional mechanism remains largely unknown. In this study, to define the cis-acting elements for viral replication and infectivity, The 5' UTR swapping chimeric clones pTLV8 and pSHSP5 were constructed based on two different genotypes full-length infectious cDNA clone pAPRRS and pSHE backbones. Between them, vTLV8 could be rescued from pTLV8 and had similar virological properties to vAPRRS, including phenotypic characteristic and RNA synthesis level. However, pSHSP5 exhibited no evidence of infectivity. Taken together, the results presented here demonstrate that only the 5' UTR of type 1 PRRSV did not affect the infectivity and replication of type 2 PRRSV in vitro. The 5' UTR of type 2 PRRSV could be functionally replaced by its counterpart from type 1. (C) 2013 Elsevier Inc. All rights reserved.
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