Sequence analysis of VP4 genes of wild type and culture adapted human rotavirus G1P[8]strains

作     者：Ritu Arora Ganesh S Dhale Pooja R Patil Shobha D Chitambar 

作者机构：Enteric Viruses GroupNational Institute of VirologyPune India 

出 版 物：《Asian Pacific Journal of Tropical Medicine》 (亚太热带医药杂志（英文版）)

年 卷 期：2011年第4卷第7期

页      面：541-546页

核心收录：

学科分类：1002[医学-临床医学] 1001[医学-基础医学(可授医学、理学学位)] 10[医学] 

基　　金：supported by National Institute of Virology(NIV Indian Council of Medical Research  Govt.of India) Pune 

主　　题：Rotavirus Cell culture G1P VP4 gene 

摘      要：Objective:To conduct a comparative analysis of the VP4 gene sequences of Indian wild type (06361,0613158,061060 and 0715880) and cell culture adapted(06361-CA,0613158-CA.061060- CA and 0715880-CA) G1P[8]rotavirus ***:Full-length VP4 genes of each of the four wild type G1P[8]rotavirus strains and their cell culture adapted counterparts displaying consistent cytopathic effect were subjected to RT-PCR amplification and nucleotide sequencing. Results:All four cell culture adapted G1P[8]rotavirus strains showed nucleotide and amino acid substitutions in the VP4 gene as compared to their wild type *** number of substitutions however,varied from 1-64 and 1-13 *** substitutions were distributed in both VP5* and VP8* subunits of VP4 gene respectively of permeabilizalion and hemagglutinaling activity. The presence of unique amino acid substitutions was identified in two of the four wild type(V377G. S387N in 061060 and 1644L in 0715880) and all four cell culture adapted(A46V in 0613158-CA. T60R in 06361-CA,L237V.G389V and Q480H in 061060-CA and S615G and T625P in 0715880-CA) strains for the first time in the VP4 gene of P[8]*** acid substitutions generated increase in the hydrophilicity in the cell culture adapted rotavirus strains as compared to their corresponding wild type ***:Amino acid substitutions detected in the VP4 genes of G1P[8]rotavirus strains from this study together with those from other studies highlight occurrence of only strain and/or host specific substitutions during cell culture adaptation. Further evaluation of such substitutions for their role in attenuation,immunogenicity and conformation is needed for the development of newer rolavirus vaccines.