Nuclear targeting activity associated with the amino terminal region of the Borna disease virus nucleoprotein

Virology
T KobayashiM Kishi

Abstract

The Borna disease virus (BDV) replicates in the nucleus. The viral p40 protein (N), which is found abundantly in the nucleus in BDV-infected cells, may play an important role in virus replication. To analyze the amino acid residues involved in the nuclear targeting of BDV N, a series of eukaryotic expression plasmids encoding deletion mutants of N was constructed and transfected into COS-7 cells. In indirect immunofluorescence assays with a rabbit anti-BDV N antiserum, wild-type N was located in the nucleus of transfected cells in the absence of other viral constituents. In contrast, mutants lacking the 13 NH2-terminal amino acid residues 1MPPKRRLVDDADA13 in common gave a cytoplasmic localization pattern. Similarly, a mutant with substitution of 4KRR6 by 4NSG6 was retained in the cytoplasm. Furthermore, a nonapeptide, 3PKRRLVDDA11, derived from the NH2-terminal region of N conferred nuclear targeting activity to beta-galactosidase, which normally resides in the cytoplasm. Thus, we have identified the nuclear targeting signal of the BDV N and narrowed it to the NH2-terminal region where 4KRR6 basic amino acid residues are located.

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Citations

Nov 9, 2002·The Journal of Infectious Diseases·Juan Carlos de la Torre
Apr 22, 2011·Journal of Virology·Ryusei KuwataKyoko Sawabe
Feb 7, 2001·Journal of Virology·M P WalkerW I Lipkin
Jul 23, 2002·Journal of Virology·Michelle Portlance Walker, W Ian Lipkin
Mar 6, 2010·Emerging Infectious Diseases·Patricia GrayIan Tizard
Aug 24, 2013·Viruses·Tomoyuki Honda, Keizo Tomonaga
Aug 6, 2014·Proceedings of the National Academy of Sciences of the United States of America·Lijiang LiuDaohong Jiang
Aug 27, 2014·Proceedings of the National Academy of Sciences of the United States of America·Kan FujinoKeizo Tomonaga
Sep 6, 2008·APMIS. Supplementum·Liv Bode
Dec 1, 2009·Virology·Miriam HockWinfried Weissenhorn
Oct 7, 2003·Structure·Markus G RudolphRalf Ficner
Sep 12, 2006·Nature Reviews. Microbiology·Juan C de la Torre
Dec 14, 2018·Journal of Virology·Shohei KojimaKeizo Tomonaga
Oct 24, 2003·The Journal of General Virology·Mar PerezJuan Carlos de la Torre
Jun 26, 2004·The Journal of General Virology·Marion PoenischUrs Schneider
Mar 10, 2001·Reviews in Medical Virology·I Jordan, W I Lipkin

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