Nucleotide sequence analysis of the nucleoprotein gene of an avian and a human influenza virus strain identifies two classes of nucleoproteins.
Identifieur interne : 001086 ( Ncbi/Merge ); précédent : 001085; suivant : 001087Nucleotide sequence analysis of the nucleoprotein gene of an avian and a human influenza virus strain identifies two classes of nucleoproteins.
Auteurs : A J Buckler-White ; B R MurphySource :
- Virology [ 0042-6822 ] ; 1986.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical , classification : Nucleoproteins, Viral Proteins.
- genetics : Influenza A virus, Nucleoproteins, RNA, Viral, Viral Proteins.
- Amino Acid Sequence, Base Sequence, Biological Evolution, Genes, Viral, Sequence Homology, Nucleic Acid.
Abstract
The nucleotide sequences of RNA segment 5 of an avian influenza A virus, A/Mallard/NY/6750/78 (H2N2), and a human influenza A virus, A/Udorn/307/72 (H3N2), were determined and the deduced amino acid sequences of the nucleoprotein (NP) of these viruses were compared to two other avian and two other human influenza A NP sequences. The results indicated that there are separate classes of avian and human influenza A NP genes that can be distinguished on the basis of sites containing amino acids specific for avian and human influenza viruses and also by amino acid composition. The human influenza A virus NP genes appear to follow a linear pathway of evolution with the greatest homology (96.9%) between A/NT/60/68 (H3N2) and A/Udorn/72, isolated only 4 years apart, and the least homology (91.1%) between A/PR/8/34 (H1N1) and A/Udorn/72, isolated 38 years apart. Furthermore, 84% of the nucleotide substitutions between A/PR/8/34 and A/NT/60/68 are preserved in the NP gene of the A/Udorn/72 strain. In contrast, a distinct linear pathway is not present in the avian influenza NP genes since the homology (90.3%) between the two avian influenza viruses A/Parrot/Ulster/73 (H7N1) and A/Mallard/78 isolated only 5 years apart is not significantly greater than the homology (90.1%) between strains A/FPV/Rostock/34 and A/Mallard/78 isolated 44 years apart and only 49% of the nucleotide substitutions between A/FPV/34 and A/Parrot/73 are found in A/Mallard/78. A determination of the rate of evolution of the human influenza A virus NP genes suggested that there were a greater number of nucleotide substitutions per year during the first several years immediately following the emergence of a new subtype in 1968.
DOI: 10.1016/0042-6822(86)90198-4
PubMed: 3788059
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pubmed:3788059Le document en format XML
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<term>Similitude de séquences d'acides nucléiques</term>
<term>Séquence d'acides aminés</term>
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<term>Évolution biologique</term>
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<term>Base Sequence</term>
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<term>Nucléoprotéines</term>
<term>Protéines virales</term>
<term>Similitude de séquences d'acides nucléiques</term>
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<front><div type="abstract" xml:lang="en">The nucleotide sequences of RNA segment 5 of an avian influenza A virus, A/Mallard/NY/6750/78 (H2N2), and a human influenza A virus, A/Udorn/307/72 (H3N2), were determined and the deduced amino acid sequences of the nucleoprotein (NP) of these viruses were compared to two other avian and two other human influenza A NP sequences. The results indicated that there are separate classes of avian and human influenza A NP genes that can be distinguished on the basis of sites containing amino acids specific for avian and human influenza viruses and also by amino acid composition. The human influenza A virus NP genes appear to follow a linear pathway of evolution with the greatest homology (96.9%) between A/NT/60/68 (H3N2) and A/Udorn/72, isolated only 4 years apart, and the least homology (91.1%) between A/PR/8/34 (H1N1) and A/Udorn/72, isolated 38 years apart. Furthermore, 84% of the nucleotide substitutions between A/PR/8/34 and A/NT/60/68 are preserved in the NP gene of the A/Udorn/72 strain. In contrast, a distinct linear pathway is not present in the avian influenza NP genes since the homology (90.3%) between the two avian influenza viruses A/Parrot/Ulster/73 (H7N1) and A/Mallard/78 isolated only 5 years apart is not significantly greater than the homology (90.1%) between strains A/FPV/Rostock/34 and A/Mallard/78 isolated 44 years apart and only 49% of the nucleotide substitutions between A/FPV/34 and A/Parrot/73 are found in A/Mallard/78. A determination of the rate of evolution of the human influenza A virus NP genes suggested that there were a greater number of nucleotide substitutions per year during the first several years immediately following the emergence of a new subtype in 1968.</div>
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<ArticleTitle>Nucleotide sequence analysis of the nucleoprotein gene of an avian and a human influenza virus strain identifies two classes of nucleoproteins.</ArticleTitle>
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<Abstract><AbstractText>The nucleotide sequences of RNA segment 5 of an avian influenza A virus, A/Mallard/NY/6750/78 (H2N2), and a human influenza A virus, A/Udorn/307/72 (H3N2), were determined and the deduced amino acid sequences of the nucleoprotein (NP) of these viruses were compared to two other avian and two other human influenza A NP sequences. The results indicated that there are separate classes of avian and human influenza A NP genes that can be distinguished on the basis of sites containing amino acids specific for avian and human influenza viruses and also by amino acid composition. The human influenza A virus NP genes appear to follow a linear pathway of evolution with the greatest homology (96.9%) between A/NT/60/68 (H3N2) and A/Udorn/72, isolated only 4 years apart, and the least homology (91.1%) between A/PR/8/34 (H1N1) and A/Udorn/72, isolated 38 years apart. Furthermore, 84% of the nucleotide substitutions between A/PR/8/34 and A/NT/60/68 are preserved in the NP gene of the A/Udorn/72 strain. In contrast, a distinct linear pathway is not present in the avian influenza NP genes since the homology (90.3%) between the two avian influenza viruses A/Parrot/Ulster/73 (H7N1) and A/Mallard/78 isolated only 5 years apart is not significantly greater than the homology (90.1%) between strains A/FPV/Rostock/34 and A/Mallard/78 isolated 44 years apart and only 49% of the nucleotide substitutions between A/FPV/34 and A/Parrot/73 are found in A/Mallard/78. A determination of the rate of evolution of the human influenza A virus NP genes suggested that there were a greater number of nucleotide substitutions per year during the first several years immediately following the emergence of a new subtype in 1968.</AbstractText>
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