Complete genome sequence analysis of Japanese encephalitis virus newly isolated in China / 中华实验和临床病毒学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To study the complete genome sequence of Japanese encephalitis virus (JEV) strain XJ69 isolated in ZheJiang province and explore its evolution.</p><p><b>METHODS</b>Overlapping primers were designed according to the full-length genomes from GenBank. RT-PCR was used to amplify the fragments and RT-PCR products were cloned T vector, sequenced and analyzed.</p><p><b>RESULTS</b>The genome of strain XJ69 and XJP613 were 10 964 nucleotides in length with a single open reading frame encoding 3432 amino acids. Comparison of the complete genome sequences of different JEV isolates showed XJ69 and XJP613 were 83.5%-99.2% and 83.4%-99.4% nucleotide sequence homology among them respectively, which resulted in 94.8%-99.7% amino acid sequence homology. Phylogenetic analysis through PrM/C,E and full-length genome showed that the XJ69 and XJP613 strain belonged to genotype I.</p><p><b>CONCLUSION</b>The nucleotitede sequence and deduced amino acid sequence of XJ69 and XJP613 strain were similar to that of those of genotype I of Japanese encephalitis virus. It belonged to genotype I and were close to the isolates SH17M-07.</p>