ENGLISH ABSTRACT
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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[Sequencing and analyses on glycoprotein gene of rabies viruses isolated in Zhejiang province, China].

OBJECTIVE: Based on sequencing the genomes of glycoprotein (GP) gene of rabies viruses isolated in Zhejiang, we analyzed the properties of rabies viruses genetic variation in molecular level, and to compare with those of other representative vaccine strains and street virus strains, get the information about rabies viruses variation.

METHODS: Suckling mice against rabies virus were selected. Overlapped fragments were amplified by RT-PCR and full-length genomes were assembled to analyze the nucleotide and deduced protein similarities and phylogenetic analyses of the GP genes.

RESULTS: The fourteen full-length genomes were completely sequenced and they had the same genetic structure with 1575 nts and deduced protein with 524 aa. Genetic analysis revealed that the nucleotide and amino acid homologies of GP gene from Zhejiang strains and other vaccine strains or street virus strains were 82.3% - 99.9% and 85.1% - 99.8%. The fourteen strains were genotype 1 according to the phylogenetic analyses. The GP amino acids of Zhejiang strains rabies virus strains without any recombination occurred in GP and no larger variation appeared in the major antigenic sites.

CONCLUSION: The comprehensive analysis based on the first-level structure of GP demonstrated that it was possible that some advantageous antigenic epitopes existed in certain areas and potential antigenic determinants. It was evident that the GP gene of Zhejiang strains appear to be stable and their sequence similarity with the representative strains of street virus in China were higher than those of other vaccine strains. Some differences showed in the genetic structure and evolution relationship among Zhejiang strains, other street strains in other regions and vaccine strains.

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