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Nucleotide sequence of the genome segment encoding nonstructural protein NS1 of bluetongue virus serotype 20 from Australia



Nucleotide sequence of the genome segment encoding nonstructural protein NS1 of bluetongue virus serotype 20 from Australia



Virus Genes 6(4): 387-392



The nucleotide sequence of the genome segment (S6) encoding the nonstructural protein NS1 of an Australian isolate of bluetongue virus serotype 20 (BTV 20) has been determined from a series of overlapping cDNA clones synthesized using two terminal 15-mer oligonucleotides as primers. The gene consists of 1769 nucleotides with an open reading frame between nucleotides 35 and 1690 encoding a protein of 552 amino acids (molecular weight 64,506 Da; net charge -2 at pH 7). Comparison of the nucleotide and deduced amino acid sequence of this genome segment with cognate segments of isolates of BTV 1 from Australia and South Africa, and BTV 10 and BTV 17 from the United States, revealed homologies of 98%, 80%, 79%, and 79%, respectively, at the nucleotide level and 98%, 90%, 89%, and 90% identity, respectively, at the amino acid level. The data indicate that the evolutionary divergence between NS1 genes of two different Australian BTV serotypes (BTV 20 and BTV 1) is less than that between isolates of the same (BTV 1) or different serotypes from different geographical locations.

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Accession: 040828687

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PMID: 1335630

DOI: 10.1007/bf01703087


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