Molecular Characterization and Phylogenetic Analysis of the Complete Genome of a Porcine Sapovirus from Chinese Swine

Overview

Journal Virol J

Publisher Biomed Central

Specialty Microbiology

Date 2009 Dec 8

PMID 19961620

Citations 7

Authors

Shixing Yang

Wen Zhang

Quan Shen

Fen Huang

Yan Wang

Jianguo Zhu

Li Cui

Zhibiao Yang

Xiuguo Hua

Affiliations

Soon will be listed here.

Abstract

Background: Porcine sapovirus was first identified in the United States in 1980, hitherto, several Asian countries have detected this virus. In 2008, the first outbreak of gastroenteritis in piglets caused by porcine sapovirus in China was reported. The complete genome of the identified SaV strain Ch-sw-sav1 was sequenced and analyzed to provide gene profile for this outbreak.

Methods: The whole genome of Ch-sw-sav1 was amplified by RT-PCR and was sequenced. Sequence alignment of the complete genome or RNA dependent RNA polymerase (RdRp) gene was done. 3' end of ORF2 with 21-nt nucleotide insertion was further analyzed using software.

Results: Sequence analysis indicated that the genome of Ch-sw-sav1 was 7541 nucleotide long with two ORFs, excluding the 17 nucleotides ploy (A) at the 3' end. Phylogenetic analysis based on part of RdRp gene of this strain showed that it was classified into subgroup GIII. Sequence alignment indicated that there was an inserted 21-nt long nucleotide sequence at the 3' end of ORF2. The insertion showed high antigenicity index comparing to other regions in ORF2.

Conclusion: Ch-sw-sav1 shared similar genetic profile with an American PEC strain except the 21-nt nucleotide at the 3' end of ORF2. The insert sequence shared high identity with part gene of Sus scrofa clone RP44-484M10.

Citing Articles

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Serological and molecular investigation of porcine sapovirus infection in piglets in Xinjiang, China.

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