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JC virus Type 1 has multiple subtypes: three new complete genomes

H T Agostini1, C F Ryschkewitsch, G L Stoner

  • 1Neurotoxicology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-4126, USA.

The Journal of General Virology
|May 6, 1998
PubMed
Summary
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Researchers analyzed three new JC virus (JCV) Type 1 strains from urine. Findings define JCV Type 1 subtypes and support VP1 gene genotyping for JC virus classification.

Area of Science:

  • Virology
  • Molecular Biology
  • Genomics

Background:

  • JC virus (JCV) is a human polyomavirus with diverse genotypes.
  • Understanding JCV genetic diversity is crucial for studying its epidemiology and pathogenesis.
  • Previous typing methods relied on limited genetic regions, necessitating comprehensive genomic analysis.

Purpose of the Study:

  • To analyze the complete genomes of three novel JC virus Type 1 strains obtained from urine samples.
  • To determine the subtypes of these new JCV Type 1 strains and compare them to existing reference strains.
  • To evaluate the utility of the VP1 gene fragment for JC virus genotyping.

Main Methods:

  • Whole-genome sequencing of three urine-derived JC virus strains.
  • Bioinformatic analysis comparing novel sequences to known JCV genotypes (e.g., Mad1, GS/B).

Related Experiment Videos

  • Phylogenetic analysis and identification of sequence variations within the VP1 gene and coding regions.

    • Main Results:

    • Three new JC virus strains were identified as subtype 1A, subtype 1B, and Type 4.
    • The Type 4 strain, based on its complete genome, belongs to the Type 1 subgroup and shows potential recombinant characteristics.
    • Significant sequence differences, including amino acid changes, were observed between Type 1, Type 2, and Type 3 JCV strains.

    Conclusions:

    • The study successfully defines subtypes within JC virus Type 1 based on complete genome analysis.
    • The VP1 gene fragment is validated as a reliable tool for JC virus genotyping.
    • The findings contribute to a better understanding of JC virus genetic diversity and evolution.