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Role of nucleocapsid protein of hantaviruses in intracellular traffic of viral glycoproteins

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Title: Role of nucleocapsid protein of hantaviruses in intracellular traffic of viral glycoproteins
Authors: Shimizu, Kenta Browse this author
Yoshimatsu, Kumiko Browse this author
Koma, Takaaki Browse this author
Yasuda, Shumpei P. Browse this author
Arikawa, Jiro Browse this author →KAKEN DB
Keywords: HFRS
HPS
Bunyaviridae
Assembly
Transport
Golgi
Issue Date: 26-Dec-2013
Publisher: Elsevier science bv
Journal Title: Virus research
Volume: 178
Issue: 2
Start Page: 349
End Page: 356
Publisher DOI: 10.1016/j.virusres.2013.09.022
PMID: 24070985
Abstract: To understand the role of nucleocapsid protein (NP) of hantaviruses in viral assembly, the effect of NP on intracellular traffic of viral glycoproteins Gn and Gc was investigated. Double staining of viral and host proteins in Hantaan virus (HTNV)-infected Vero E6 cells showed that Gn and Gc were localized to cis-Golgi, in which virus particles are thought to be formed. When HTNV Gn and Gc were expressed by a plasmid encoding glycoprotein precursor (GPC), which is posttranslationaly cleaved into Gn and Gc, Gn was localized to cis-Golgi, whereas Gc showed diffuse distribution in the cytoplasm in 32.9% of Gc-positive cells. The ratio of the diffused Gc-positive cells was significantly decreased to 15.0% by co-expression of HTNV NP. Co-expression of HTNV GPC with NPs of other hantaviruses, such as Seoul virus, Puumala virus and Sin Nombre virus, also reduced the ratios of diffused Gc-positive cells to 13.5%, 25.2%, and 11.6%, respectively. Among amino- and carboxyl-terminally truncated HTNV NPs, NP75-429, NP116-429, NP1-333, NP1-233, and NP1-155 possessed activity to reduce the ratio of diffused Gc-positive cells, while NP155-429 and NP1-116 did not. NP30-429 has partial activity. These results indicate that amino acid region 116-155 of NP is important for the activity, although amino acid region 1-30 is partially related. Truncation of the HTNV Gc cytoplasmic tail caused an increase in diffused Gc-positive cells. In addition, the effect of coexpression of HTNV NP was weakened. These results suggest that HTNV NP has a role to promote Golgi localization of Gc through a mechanism possibly mediated by the Gc cytoplasmic tail.
Type: article (author version)
URI: http://hdl.handle.net/2115/54732
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 清水 健太

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