PMID- 23453581 OWN - NLM STAT- MEDLINE DCOM- 20130507 LR - 20211021 IS - 1096-0341 (Electronic) IS - 0042-6822 (Print) IS - 0042-6822 (Linking) VI - 439 IP - 1 DP - 2013 Apr 25 TI - Replacement of the heterologous 5' untranslated region allows preservation of the fully functional activities of type 2 porcine reproductive and respiratory syndrome virus. PG - 1-12 LID - S0042-6822(12)00641-1 [pii] LID - 10.1016/j.virol.2012.12.013 [doi] AB - 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. CI - Copyright (c) 2013 Elsevier Inc. All rights reserved. FAU - Gao, Fei AU - Gao F AD - Department of Swine Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China. FAU - Yao, Huochun AU - Yao H FAU - Lu, Jiaqi AU - Lu J FAU - Wei, Zuzhang AU - Wei Z FAU - Zheng, Haihong AU - Zheng H FAU - Zhuang, Jinshan AU - Zhuang J FAU - Tong, Guangzhi AU - Tong G FAU - Yuan, Shishan AU - Yuan S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130301 PL - United States TA - Virology JT - Virology JID - 0110674 RN - 0 (5' Untranslated Regions) RN - 0 (RNA, Viral) SB - IM MH - *5' Untranslated Regions MH - Animals MH - Base Sequence MH - Blotting, Northern MH - Cell Line MH - Models, Molecular MH - Molecular Sequence Data MH - Nucleic Acid Conformation MH - Porcine respiratory and reproductive syndrome virus/genetics/growth & development/*physiology MH - RNA, Viral/*genetics MH - Recombination, Genetic MH - Sequence Alignment MH - Swine MH - Viral Load MH - Viral Plaque Assay MH - *Virus Replication PMC - PMC7111940 EDAT- 2013/03/05 06:00 MHDA- 2013/05/08 06:00 PMCR- 2013/03/01 CRDT- 2013/03/05 06:00 PHST- 2012/09/30 00:00 [received] PHST- 2012/12/20 00:00 [revised] PHST- 2012/12/25 00:00 [accepted] PHST- 2013/03/05 06:00 [entrez] PHST- 2013/03/05 06:00 [pubmed] PHST- 2013/05/08 06:00 [medline] PHST- 2013/03/01 00:00 [pmc-release] AID - S0042-6822(12)00641-1 [pii] AID - 10.1016/j.virol.2012.12.013 [doi] PST - ppublish SO - Virology. 2013 Apr 25;439(1):1-12. doi: 10.1016/j.virol.2012.12.013. Epub 2013 Mar 1.