Nucleotide sequences of the neuraminidase genes of influenza A/Leningrad/134/57 (H2N2) virus and two of its live, attenuated, cold-adapted variants
Identifieur interne : 001E21 ( Main/Merge ); précédent : 001E20; suivant : 001E22Nucleotide sequences of the neuraminidase genes of influenza A/Leningrad/134/57 (H2N2) virus and two of its live, attenuated, cold-adapted variants
Auteurs : Alexander I. Klimov [États-Unis, Russie] ; Julia R. Romanova [Russie] ; Andrei Y. Egorov [Russie] ; Irina V. Lukashok [Russie] ; Irina V. Kiseleva [Russie] ; Galina I. Alexandrova [Russie] ; Nancy J. Cox [États-Unis]Source :
- Virus Genes [ 0920-8569 ] ; 1995-02-01.
English descriptors
- KwdEn :
- Teeft :
- Alexandrova, Attenuated, Bgli, Bgli restriction site, Coding mutation, Disease control, Gene, Genome, Influenza, Influenza branch, Kendal, Klimov, Master strains, Medical sciences, National center, Nucleotide, Nucleotide change, Nucleotide differences, Nucleotide sequence, Nucleotide sequences, Reassortant, Reassortants, Restriction analysis, Rickettsial diseases, Russian academy, Sequence data, Vaccine.
Abstract
Abstract: The nucleotide sequences of the neuraminidase (NA) genes of the A/Leningrad/134/57 (H2N2) wild-type (Len/wt) virus as well as two of its live attenuated, cold-adapted (ca) variants, A/Leningrad/134/17/57 (Len/17) and A/Leningrad/134/47/57 (Len/47), were determined. In comparison with Len/wt, one nucleotide change (C-225 to A) was found in the NA gene of Len/17. This change codes for a Thr-to-Asn substitution at position 69 of NA. The NA gene of the more attenuated Len/47 ca virus has one silent (T-814 to C) and two coding nucleotide substitutions, C-78 to T (Ala-20 to Val) and C-225 to A (Thr-69 to Asn). These sequence data were used to design a PCR-restriction technique to determine the origin of the NA gene in candidate live, attenuated vaccine reassortants made by reassorting these ca strains with current field viruses.
Url:
DOI: 10.1007/BF01724302
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<term>Influenza</term>
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<term>Nucleotide sequence</term>
<term>Nucleotide sequences</term>
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<front><div type="abstract" xml:lang="en">Abstract: The nucleotide sequences of the neuraminidase (NA) genes of the A/Leningrad/134/57 (H2N2) wild-type (Len/wt) virus as well as two of its live attenuated, cold-adapted (ca) variants, A/Leningrad/134/17/57 (Len/17) and A/Leningrad/134/47/57 (Len/47), were determined. In comparison with Len/wt, one nucleotide change (C-225 to A) was found in the NA gene of Len/17. This change codes for a Thr-to-Asn substitution at position 69 of NA. The NA gene of the more attenuated Len/47 ca virus has one silent (T-814 to C) and two coding nucleotide substitutions, C-78 to T (Ala-20 to Val) and C-225 to A (Thr-69 to Asn). These sequence data were used to design a PCR-restriction technique to determine the origin of the NA gene in candidate live, attenuated vaccine reassortants made by reassorting these ca strains with current field viruses.</div>
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