title: Generation of Recombinant Polioviruses Harboring RNA Affinity Tags in the 5' and 3' Noncoding Regions of Genomic RNAs.
abstract: Despite being intensely studied for more than 50 years, a complete understanding of the enterovirus replication cycle remains elusive. Specifically, only a handful of cellular proteins have been shown to be involved in the RNA replication cycle of these viruses. In an effort to isolate and identify additional cellular proteins that function in enteroviral RNA replication, we have generated multiple recombinant polioviruses containing RNA affinity tags within the 3' or 5' noncoding region of the genome. These recombinant viruses retained RNA affinity sequences within the genome while remaining viable and infectious over multiple passages in cell culture. Further characterization of these viruses demonstrated that viral protein production and growth kinetics were unchanged or only slightly altered relative to wild type poliovirus. However, attempts to isolate these genetically-tagged viral genomes from infected cells have been hindered by high levels of co-purification of nonspecific proteins and the limited matrix-binding efficiency of RNA affinity sequences. Regardless, these recombinant viruses represent a step toward more thorough characterization of enterovirus ribonucleoprotein complexes involved in RNA replication.
authors: Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, CA 92697, USA. dflather@uci.edu.
authors: Dylan
authors: D
authors: Flather
authors: Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, CA 92697, USA. andrea.cathcart@gilead.com.|Present address: Gilead Sciences, Inc., Foster City, CA 94404, USA. andrea.cathcart@gilead.com.
authors: Andrea L
authors: AL
authors: Cathcart
authors: Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, CA 92697, USA. cruzc3@uci.edu.
authors: Casey
authors: C
authors: Cruz
authors: Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, CA 92697, USA. ebaggs@uci.edu.
authors: Eric
authors: E
authors: Baggs
authors: Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA. tngo5@uci.edu.
authors: Tuan
authors: T
authors: Ngo
authors: Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, USA. pgershon@uci.edu.
authors: Paul D
authors: PD
authors: Gershon
authors: Department of Microbiology and Molecular Genetics, School of Medicine, University of California, Irvine, CA 92697, USA. blsemler@uci.edu.
authors: Bert L
authors: BL
authors: Semler
mesh_terms: D016679:Genome, Viral; D006801:Humans; D009690:Nucleic Acid Conformation; D011051:Poliomyelitis / Q000821:virology*; D017955:Poliovirus / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D012367:RNA, Viral / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism; D011995:Recombination, Genetic; D014764:Viral Proteins / Q000235:genetics / Q000378:metabolism; D014779:Virus Replication
chemical_list: D012367:RNA, Viral; D014764:Viral Proteins
keywords: MS2 hairpin; RNA affinity; RNA replication complexes; RNP isolation; aptamer; enterovirus RNA replication; ribonucleoprotein complexes