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J Gen Virol 89 (2008), 1300-1308; DOI 10.1099/vir.0.83582-0

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The C, V and W proteins of Nipah virus inhibit minigenome replication

Katrina Sleeman1,{dagger}, Bettina Bankamp1, Kimberly B. Hummel1, Michael K. Lo1,2,3, William J. Bellini1 and Paul A. Rota1

1 Measles, Mumps, Rubella, and Herpesvirus Laboratory Branch, Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
2 The Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
3 Emory University, Atlanta, GA, USA

Correspondence
Paul A. Rota
prota{at}cdc.gov

Nipah virus (NiV) is a recently emergent, highly pathogenic, zoonotic paramyxovirus of the genus Henipavirus. Like the phosphoprotein (P) gene of other paramyxoviruses, the P gene of NiV is predicted to encode three additional proteins, C, V and W. When the C, V and W proteins of NiV were tested for their ability to inhibit expression of the chloramphenicol acetyltransferase (CAT) reporter gene in plasmid-based, minigenome replication assays, each protein inhibited CAT expression in a dose-dependent manner. The C, V and W proteins of NiV also inhibited expression of CAT from a measles virus (MV) minigenome, but not from a human parainfluenzavirus 3 (hPIV3) minigenome. Interestingly, the C and V proteins of MV, which have previously been shown to inhibit MV minigenome replication, also inhibited NiV minigenome replication; however, they were not able to inhibit hPIV3 minigenome replication. In contrast, the C protein of hPIV3 inhibited minigenome replication of hPIV3, NiV and MV. Although there is very limited amino acid sequence similarity between the C, V and W proteins within the paramyxoviruses, the heterotypic inhibition of replication suggests that these proteins may share functional properties.

{dagger}Present address: Loyola University Medical Center, Department of Microbiology and Immunology, Maywood, IL, USA.







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