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Virus Genes. 2013 Dec;47(3):478-82. doi: 10.1007/s11262-013-0966-3. Epub 2013 Aug 15.

Molecular characterization of a duck Tembusu virus from China.

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State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Harbin, 150001, People's Republic of China.


A new emerging flavivirus caused severe egg-drop in poultry and spread quickly across most duck-producing regions of China in 2010. Complete genome sequencing indicated that the virus genome is 10,989 nucleotides in length and possesses typical flavivirus genome organization, 5' untranslated region (UTR)-Cv-Ci-prM-M-E-NS1-NS2A-NS2B-NS3-NS4A-2K-NS4B-NS5-3'-UTR. The long open reading frame (ORF) encodes 3,425 amino acids (95-10,372 nt). The 94-nucleotide 5'-UTR is of intermediate size and the 617-nucleotide 3'-UTR is quite long relative to those of other flaviviruses. The polyprotein cleavage sites, potential glycosylation sites, distribution of cysteine residues, and 3'-UTR secondary structure were characterized. Phylogenetic analysis of the polyprotein sequences indicates that the HN isolate is closely related to Tembusu viruses of the Ntaya virus group.

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