Whole-genome analysis of porcine epidemic diarrhea virus (PEDV) from eastern China

Arch Virol. 2014 Oct;159(10):2777-85. doi: 10.1007/s00705-014-2102-7. Epub 2014 May 13.

Abstract

The complete genome sequence of a porcine epidemic diarrhea virus variant, strain SHQP/YM/2013, from China was determined and compared with those of other porcine epidemic diarrhea viruses. The full-length genome was 28,038 nucleotides (nt) in length without the poly (A) tail, and it was similar to that of other reported PEDV strains, with the characteristic gene order 5'-replicase (1a/1b) -S-ORF3-E-M-N-3'. Nucleotide sequence analysis based on individual virus genes indicated a close relationship between the S gene of SHQP/YM/2013 and those of the four Korean field strains from 2008-2009. Its ORF3 gene, however, fell into three groups. Recent prevalent Chinese PEDV field isolates were divided between group 1 and group 3, which suggests that the recent prevalent Chinese PEDV field isolates represent a new genotype that differs from the genotype that includes the vaccine strains. Based on phylogenetic analysis of the M gene, ORF3 gene and S gene, our study demonstrated that prevalent PEDV isolates in China may have originated from Korean strains. This report describes the complete genome sequence of SHQP/YM/2013, and the data will promote a better understanding of the molecular epidemiology and genetic diversity of PEDV field isolates in eastern China.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • China
  • Coronavirus Infections / virology
  • Feces / virology
  • Genetic Variation
  • Genome, Viral / genetics*
  • Molecular Sequence Data
  • Open Reading Frames / genetics*
  • Porcine epidemic diarrhea virus / genetics*
  • RNA, Viral / genetics
  • Sequence Alignment
  • Sequence Analysis, RNA
  • Sequence Homology, Amino Acid
  • Sequence Homology, Nucleic Acid
  • Swine / virology
  • Swine Diseases / virology
  • Viral Structural Proteins / genetics*

Substances

  • RNA, Viral
  • Viral Structural Proteins