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A conserved sequence motif at the 5′ terminus of the Southampton virus genome is characteristic of the Caliciviridae

Abstract

We have determined the 5′ terminal cDNA sequence for the genome of Southampton virus, a recently characterized, human, small round-structured virus (SRSV). Genomic RNA was extracted directly from a stool sample and amplified by RT-PCR by homopolymer tailing of the 3′ terminus of the cDNA. The additional sequence increases the overall length of the Southampton virus genome by 12 nucleotides, resulting in a significant change to the genome organization by extending the first large open reading frame (ORF) by 51 amino acids. The 5′ terminal bases pGpT and the presence of conserved genome and putative subgenomic RNA terminal motifs are now prominent features shared between the human SRSV Southampton virus and the animal caliciviruses rabbit hemorrhagic disease virus and feline calicivirus.

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Lambden, P.R., Liu, B. & Clarke, I.N. A conserved sequence motif at the 5′ terminus of the Southampton virus genome is characteristic of the Caliciviridae. Virus Genes 10, 149–152 (1995). https://doi.org/10.1007/BF01702595

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  • DOI: https://doi.org/10.1007/BF01702595

Key words

  • calicivirus
  • Southampton virus
  • genome organization
  • 5′ terminal motif