title: Quasispecies dynamics and fixation of a synonymous mutation in hantavirus transmission.
abstract: RNA-dependent RNA polymerases, the key enzymes in replication of RNA viruses, have a low fidelity; thus, these viruses replicate as a swarm of mutants termed viral quasispecies. Constant generation of new mutations allows RNA viruses to adapt swiftly to a novel environment through selection of both pre-existing and de novo-generated genetic variants. Here, quasispecies dynamics were studied in vivo in controlled hantavirus transmission from experimentally infected to naïve rodents through infested cage bedding. An elementary step of virus microevolution was apparent, as one synonymous mutation (A759G) repeatedly became fixed in the viral RNA quasispecies populations in the recipient animals.
authors.affiliation: Department of Virology, Haartman Institute, University of Helsinki, Finland.
authors.forename: Tarja
authors.initials: T
authors.lastname: Sironen
authors.affiliation: Department of Biological and Environmental Science, University of Jyväskylä, Finland.|Finnish Forest Research Institute, Vantaa, Finland.
authors.forename: Eva R
authors.initials: ER
authors.lastname: Kallio
authors.affiliation: Department of Virology, Haartman Institute, University of Helsinki, Finland.
authors.forename: Antti
authors.initials: A
authors.lastname: Vaheri
authors.affiliation: Swedish Institute for Infectious Disease Control and MTC, Karolinska Institutet, Stockholm, Sweden.
authors.forename: Åke
authors.initials: Å
authors.lastname: Lundkvist
authors.affiliation: Swedish Institute for Infectious Disease Control and MTC, Karolinska Institutet, Stockholm, Sweden.|Department of Virology, Haartman Institute, University of Helsinki, Finland.
authors.forename: Alexander
authors.initials: A
authors.lastname: Plyusnin
mesh_terms: D000818:Animals; D003411:Arvicolinae; D019143:Evolution, Molecular; D006476:Orthohantavirus / Q000235:genetics*; D018778:Hantavirus Infections / Q000635:transmission* / Q000821:virology*; D009154:Mutation; D012367:RNA, Viral / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D012367:RNA, Viral