Abstract
Noroviruses (NoVs) are one of the major causal agents of acute gastroenteritis in both industrial and developing countries including China. Recent studies have revealed that NoV genome is highly prone to mutation and recombination which may lead to emergence of new strains. In the present study, three full-length genomes of human NoV from China were determined and the genomic organization and recombination were analyzed. They had similar genome organization and contained three predicted ORFs, though the 5′UTR of those three strains were 2, 4 and 8 nucleotides, respectively. Phylogenetic analysis showed that the HU/GII/SHANGHAI/SH312/2008/CHN strain may be a recombinant of GII-3 capsid and GII-4 polymerase. To confirm the finding and detect the breakpoints where the recombination event occurred, we performed recombination analysis based on the genomic sequences of HU/GII/SHANGHAI/SH312/2008/CHN as the query sequence, and AB220921/NOV/JP/GII-4 and AB365435/NOV/US/GII-3 as the background sequences, using RPD software. Results indicated that the two parental strains were AB220921/NOV/JP/GII-4 and AB365435/NOV/US/GII-3. The breakpoint for this recombination event located at position 5,107 nt of the genome (in the ORF1 and ORF2 overlap).
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Acknowledgments
We thank Kelly Scheuer for assistance in linguistic revision of the manuscript. This work was supported by Key Project of Shanghai Science and Technology Committee of China under Grant No.10JC1406500.
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Quan Shen and Wen Zhang contributed equally to this study.
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Shen, Q., Zhang, W., Yang, S. et al. Genomic organization and recombination analysis of human norovirus identified from China. Mol Biol Rep 39, 1275–1281 (2012). https://doi.org/10.1007/s11033-011-0845-8
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DOI: https://doi.org/10.1007/s11033-011-0845-8