PMID- 11907230 OWN - NLM STAT- MEDLINE DCOM- 20020419 LR - 20190508 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 76 IP - 8 DP - 2002 Apr TI - Long-distance base pairing in flock house virus RNA1 regulates subgenomic RNA3 synthesis and RNA2 replication. PG - 3905-19 AB - Replication of flock house virus (FHV) RNA1 and production of subgenomic RNA3 in the yeast Saccharomyces cerevisiae provide a useful tool for the dissection of FHV molecular biology and host-encoded functions involved in RNA replication. The replication template activity of RNA1 can be separated from its coding potential by supplying the RNA1-encoded replication factor protein A in trans. We constructed a trans-replication system in yeast to examine cis-acting elements in RNA1 that control RNA3 production, as well as RNA1 and RNA2 replication. Two cis elements controlling RNA3 production were found. A proximal subgenomic control element was located just upstream of the RNA3 start site (nucleotides [nt] 2282 to 2777). A short distal element also controlling RNA3 production (distal subgenomic control element) was identified 1.5 kb upstream, at nt 1229 to 1239. Base pairing between these distal and proximal elements was shown to be essential for RNA3 production by covariation analysis and in vivo selection of RNA3-expressing replicons from plasmid libraries containing random sequences in the distal element. Two distinct RNA1 replication elements (RE) were mapped within the 3' quarter of RNA1: the intRE (nt 2322 to 2501) and the 3'RE (nt 2735 to 3011). The 3'RE significantly overlaps the RNA3 region in RNA1, and this information was applied to produce improved RNA3-based vectors for foreign-gene expression. In addition, replication of an RNA2 derivative was dependent on RNA1 templates capable of forming the long-distance interaction that controls RNA3 production. FAU - Lindenbach, Brett D AU - Lindenbach BD AD - Howard Hughes Medical Institute, University of Wisconsin-Madison, Madison, Wisconsin 53706-1596, USA. FAU - Sgro, Jean-Yves AU - Sgro JY FAU - Ahlquist, Paul AU - Ahlquist P LA - eng GR - R01 GM035072/GM/NIGMS NIH HHS/United States GR - R37 GM035072/GM/NIGMS NIH HHS/United States GR - GM35072/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (RNA, Viral) SB - IM MH - *Base Pairing MH - Base Sequence MH - *Gene Expression Regulation, Viral MH - Genetic Complementation Test MH - Genetic Vectors MH - Molecular Sequence Data MH - Nodaviridae/*genetics/metabolism MH - Plasmids/genetics MH - RNA Virus Infections/virology MH - RNA, Viral/*biosynthesis MH - Saccharomyces cerevisiae/genetics MH - *Virus Replication PMC - PMC136111 EDAT- 2002/03/22 10:00 MHDA- 2002/04/20 10:01 PMCR- 2002/04/01 CRDT- 2002/03/22 10:00 PHST- 2002/03/22 10:00 [pubmed] PHST- 2002/04/20 10:01 [medline] PHST- 2002/03/22 10:00 [entrez] PHST- 2002/04/01 00:00 [pmc-release] AID - 2141 [pii] AID - 10.1128/jvi.76.8.3905-3919.2002 [doi] PST - ppublish SO - J Virol. 2002 Apr;76(8):3905-19. doi: 10.1128/jvi.76.8.3905-3919.2002.