Genomic characterization of a US porcine kobuvirus strain

文献类型： 外文期刊

第一作者： Liu, Xinsheng

作者： Liu, Xinsheng;Oka, Tomoichiro;Wang, Qiuhong;Liu, Xinsheng;Oka, Tomoichiro

作者机构：

关键词： Kobuvirus;Porcine kobuvirus;Genome;Secondary structure of 5 '-untranslated region;Codon usage bias

期刊名称：ARCHIVES OF MICROBIOLOGY （ 影响因子：2.552； 五年影响因子：2.475 ）

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收录情况： SCI

摘要： Porcine kobuvirus has been detected from pig fecal samples in the USA, but there is still no information on the full-length genomes. In this study, we characterized the first complete genomic sequence of a US porcine kobuvirus strain OH/RV50/2011. The viral genome is 8123 nucleotides (nt) long, including a 576-nt 5'-untranslated region (UTR), a 7380-nt polyprotein encoding sequence, and a 167-nt 3'-UTR. A complete genome sequence alignment suggested that two types of porcine kobuviruses were found based on whether a 30-aa deletion existed in the 2B encoding region. Furthermore, several conserved motifs that can be used for the design of universal kobuvirus or porcine kobuvirus-specific primers were verified in non-structural protein genes. Phylogenetic analysis based on the complete genome sequence showed that RV50 was grouped with other porcine kobuviruses and more closely related to Chinese strains. Secondary structure analysis of the 5'-UTR showed that RV50 has three stem-loop domains in the first 108 nt and has a potential hepacivirus-/pestivirus-like type IV group-B-like internal ribosomal entry site, like the porcine kobuvirus prototype strain S-1. Codon usage analysis showed that the most preferred usage tends to be C or U at the end of a codon in a porcine kobuvirus genome. These results will be useful in understanding the evolution of porcine kobuviruses .

分类号： Q93

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