猪繁殖与呼吸综合征病毒强弱毒株全基因序列比对分析

doi:10.16431/j.cnki.1671-7236.2016.07.008

Abstract

Abstract:

To study the attenuation molecular basis of porcine reproductive and respiratory syndrome virus (PRRSV),whole genomes of PRRSV JXA1-5 (parental strain) and JXA1-86 (attenuated strain) were sequenced,compared and analyzed.And genomic sequences of JXA1/JXA1-86 were compared with the other two pairs of virulent parental/attenuated vaccine strains.The results showed that there was higher amino acid mutation rate in structural proteins among the three pairs of strains indicating that PRRSV JXA1 strain virulence changes were more related to structure proteins variations.Compared with JXA1,the amino acids encoding Nsp5,Nsp6,Nsp8,Nsp12,M and N proteins of JXA1-86 strain did not change,suggesting that virulence attenuating might not be relevant to those proteins.The genomic sequences of each generation PRRSV sequence were compared and analyzed,and the results showed that the variations among A₉₂₈V,I₁₁₅₅M,E₁₆₂₉D in ORF1a,I₁₁₈V in GP2,H₇₉N in GP3,I₁₂₄V in GP4 and K₅₉N in GP5 between 70th and 86th generations were found,which turned out that virulence attenuating might be associate with those variations.

Key words: PRRSV JXA1 strain; complete genome sequencing; virulence attenuating

CLC Number:

S858.28

WANG Ye-hua, ZHANG Xin-xin, SONG Qing-qing, LI Yu-he, GONG Li-na, GUAN Ping-yuan. Complete Genome Comparison and Analysis between Porcine Reproductive and Respiratory Syndrome Virus Parental and Its Attenuated Strains[J]. , 2016, 43(7): 1709-1716.

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Complete Genome Comparison and Analysis between Porcine Reproductive and Respiratory Syndrome Virus Parental and Its Attenuated Strains

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