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Characterization of nonstructural protein 3 of a neurovirulent Japanese encephalitis virus strain isolated from a pig.
- Source :
-
Virology journal [Virol J] 2011 May 09; Vol. 8, pp. 209. Date of Electronic Publication: 2011 May 09. - Publication Year :
- 2011
-
Abstract
- Background: Japanese encephalitis virus (JEV), as a re-emerging virus that causes 10,000-15,000 human deaths from encephalitis in the world each year, has had a significant impact on public health. Pigs are the natural reservoirs of JEV and play an important role in the amplification, dispersal and epidemiology of JEV. The nonstructural protein 3 (NS3) of JEV possesses enzymatic activities of serine protease, helicase and nucleoside 5'-triphosphatase, and plays important roles in viral replication and pathogenesis.<br />Results: We characterized the NS3 protein of a neurovirulent strain of JEV (SH-JEV01) isolated from a field-infected pig. The NS3 gene of the JEV SH-JEV01 strain is 1857 bp in length and encodes protein of approximately 72 kDa with 99% amino acid sequence identity to that of the representative immunotype strain JaGAr 01. The NS3 protein was detectable 12 h post-infection in a mouse neuroblastoma cell line, Neuro-2a, and was distributed in the cytoplasm of cells infected with the SH-JEV01 strain of JEV. In the brain of mice infected with the SH-JEV01 strain of JEV, NS3 was detected in the cytoplasm of neuronal cells, including pyramidal neurons of the cerebrum, granule cells, small cells and Purkinje cells of the cerebellum.<br />Conclusions: The NS3 protein of a neurovirulent strain of JEV isolated from a pig was characterized. It is an approximately 72 kDa protein and distributed in the cytoplasm of infected cells. The Purkinje cell of the cerebellum is one of the target cells of JEV infection. Our data should provide some basic information for the study of the role of NS3 in the pathogenesis of JEV and the immune response.
- Subjects :
- Animals
Brain virology
Cell Line
Cricetinae
Cytoplasm virology
Disease Reservoirs virology
Encephalitis Virus, Japanese genetics
Encephalitis Virus, Japanese isolation & purification
Encephalitis, Japanese virology
Gene Expression Regulation, Viral
Mice
Mice, Inbred BALB C
Protein Transport
RNA Helicases genetics
RNA Helicases metabolism
Serine Endopeptidases genetics
Serine Endopeptidases metabolism
Swine
Viral Nonstructural Proteins genetics
Encephalitis Virus, Japanese metabolism
Encephalitis, Japanese veterinary
Swine Diseases virology
Viral Nonstructural Proteins metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1743-422X
- Volume :
- 8
- Database :
- MEDLINE
- Journal :
- Virology journal
- Publication Type :
- Academic Journal
- Accession number :
- 21549011
- Full Text :
- https://doi.org/10.1186/1743-422X-8-209