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Title: Evolutionarily Conserved Interaction between the Phosphoproteins and X Proteins of Bornaviruses from Different Vertebrate Species.
Authors: Fujino, Kan
Horie, Masayuki  KAKEN_id  orcid https://orcid.org/0000-0003-4682-7698 (unconfirmed)
Honda, Tomoyuki  KAKEN_id
Nakamura, Shoko
Matsumoto, Yusuke
Francischetti, Ivo M B
Tomonaga, Keizo  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-0405-7103 (unconfirmed)
Author's alias: 朝長, 啓造
Issue Date: 7-Dec-2012
Publisher: Public Library of Science
Journal title: PloS one
Volume: 7
Issue: 12
Thesis number: e51161
Abstract: Bornavirus, a non-segmented, negative-strand RNA viruses, is currently classified into several genetically distinct genotypes, such as Borna disease virus (BDV) and avian bornaviruses (ABVs). Recent studies revealed that bornavirus genotypes show unique sequence variability in the putative 5' untranslated region (5' UTR) of X/P mRNA, a bicistronic mRNA for the X protein and phosphoprotein (P). In this study, to understand the evolutionary relationship among the bornavirus genotypes, we investigated the functional interaction between the X and P proteins of four bornavirus genotypes, BDV, ABV genotype 4 and 5 and reptile bornavirus (RBV), the putative 5' UTRs of which exhibit variation in the length. Immunofluorescence and immunoprecipitation analyses using mammalian and avian cell lines revealed that the X proteins of bornaviruses conserve the ability to facilitate the export of P from the nucleus to the cytoplasm via interaction with P. Furthermore, we showed that inter-genotypic interactions may occur between X and P among the genotypes, except for X of RBV. In addition, a BDV minireplicon assay demonstrated that the X and P proteins of ABVs, but not RBV, can affect the polymerase activity of BDV. This study demonstrates that bornaviruses may have conserved the fundamental function of a regulatory protein during their evolution, whereas RBV has evolved distinctly from the other bornavirus genotypes.
Rights: This is an open-access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.
URI: http://hdl.handle.net/2433/169354
DOI(Published Version): 10.1371/journal.pone.0051161
PubMed ID: 23236446
Appears in Collections:Journal Articles

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