The complete genomic sequence analysis of genotype 4 human astrovirus HASTVgz01 strain in Guangzhou-中国期刊网

摘要 ToanalyzethegenomicmolecularstructureandgenotypeofhumanastrovirusisolatedfrominfantinGuangzhouofChina,theprimersweredesignedbasedonthegenomicsequenceofastrovirusfromtheGenBankandthetargetsequencewereamplifiedbyRT-PCR.ThenthePCR-productswereclonedtoTvectorandsequenced.ThegenomicnucleotidesequenceswereanalyzedbytheprogramsCLUSTALWandDNASTAR.ItwasfoundthatthefullgenomiclengthofHASTVgz01strainwas6721bpandtheORFswere6558bp.The5'and3'UTRwere82and81nucleotides.Thegenomeincluded3openreadingframes(ORFs):ORF1a,ORF1bandORF2.The5'-terminalORF1astartedatnucleotide83andextendedtonucleotide2845.ORFlb(nt2785tont4332)overlapedORFlaby61nucleotides.The3'-terminalORF2beganatnucleotide4325andterminatedatnucleotide6640.ORF2had2316nucleotides.ComparedwithotherastrovirussequencesinGenBank,thehomologyoftheaminoacidsequenceofORF2ofHASTVgz01strainwiththatofserotype4was93%.Homologywithotherserotypesrangedfrom61%to70%.ThecompletenucleotidesequenceofastrovirusHASTVgz01strainisolatedfromGuangzhouinChinawas6721bpinlength,GenBankaccessionNO.DQ344027.ComparingtheORF2ofastrovirusHASTVgz01withtheknownsequencesoftypes1-8thehighesthomologywasserotype4(93%).ComparativesequenceanalysisoftheHASTVgz01ORF2withthereportedhumanastrovirussequencesrevealedthattheisolatedastrovirusbelongstogenotype(serotype)4.

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The complete genomic sequence analysis of genotype 4 human astrovirus HASTVgz01 strain in Guangzhou

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The complete genomic sequence analysis of genotype 4 human astrovirus HASTVgz01 strain in Guangzhou

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