NDLI: The lactate dehydrogenase-elevating virus capsid protein is a nuclear

Content Provider	Springer Nature Link
Author	Mohammadi, Hakimeh Sharif, Shayan Rowland, Raymond R. Yoo, Dongwan
Copyright Year	2009
Abstract	Arteriviruses replicate in the cytoplasm and do not require the nucleus function for virus multiplication in vitro. However, nucleocapsid (N) protein of two arteriviruses, porcine reproductive respiratory syndrome virus and equine arteritis virus, has been observed to localize in the nucleus and nucleolus of virus-infected and N-gene-transfected cells in addition to their normal cytoplasmic distribution. In the present study, the N protein of lactate dehydrogenase-elevating virus (LDV) of mice was examined for nuclear localization. The subcellular localization of LDV-N was determined by tagging N with enhanced green fluorescence protein (EGFP) at the N- and C-terminus. Both N-EGFP and EGFP-N fusion proteins localized to the nucleus and nucleolus of gene-transfected cells. Labeled N also accumulated in the perinuclear region, the site of virus replication. The LDV-N sequence contains a putative ‘pat4’-type nuclear localization signal (NLS) consisting of 38-KKKK. To determine its functional significance, a series of deletion constructs of N were generated and individually expressed in cells. The results showed that the ‘pat4’ NLS was essential for nuclear translocation. In addition, the LDV-N interacted with the importin-α and -β proteins, suggesting that the LDV-N nuclear localization may occur via the importin-mediated nuclear transport pathway. These results provide further evidence for the nuclear localization of N as a common feature within the arteriviruses.
Starting Page	1071
Ending Page	1080
Page Count	10
File Format	PDF
ISSN	03048608
Journal	Archives of Virology
Volume Number	154
Issue Number	7
e-ISSN	14328798
Language	English
Publisher	Springer Vienna
Publisher Date	2009-06-11
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Infectious Diseases Medical Microbiology Virology
Content Type	Text
Resource Type	Article
Subject	Virology Medicine

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