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A web-based genotyping resource for viral sequences.

Mikhail Rozanov1, Uwe Plikat, Colombe Chappey

  • 1National Center for Biotechnology Information, National Library of Medicine, National Institute of Health, Building 38A, Room S602, 8600 Rockville Pike, Bethesda, MD 20892, USA.

Nucleic Acids Research
|June 25, 2004
PubMed
Summary

The National Center for Biotechnology Information Genotyping tool identifies viral genotypes using BLAST comparisons. This web-based program quickly determines subtypes of human immunodeficiency virus 1, hepatitis C virus, and hepatitis B virus sequences.

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Area of Science:

  • Bioinformatics
  • Virology
  • Molecular Biology

Background:

  • Accurate viral genotyping is crucial for understanding disease transmission and guiding treatment strategies.
  • Existing methods for viral sequence subtyping can be complex and time-consuming.
  • The National Center for Biotechnology Information (NCBI) provides essential bioinformatics resources for biological research.

Purpose of the Study:

  • To introduce and describe the NCBI Genotyping tool, a web-based program for identifying viral genotypes.
  • To highlight the tool's capability in analyzing both recombinant and non-recombinant viral nucleotide sequences.
  • To provide researchers with an accessible platform for rapid viral subtype determination.

Main Methods:

  • The tool utilizes the Basic Local Alignment Search Tool (BLAST) to compare query viral sequences against a comprehensive database of reference sequences.

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  • Predefined reference genotypes are available for human immunodeficiency virus 1 (HIV-1), hepatitis C virus (HCV), and hepatitis B virus (HBV).
  • Query sequences are segmented for detailed analysis, enabling the identification of mosaic structures in recombinant viruses.

    • Main Results:

    • The Genotyping tool successfully identifies the genotype or subtype of viral nucleotide sequences.
    • Graphical, color-coded displays of results allow for quick determination of genotypes across different sequence portions.
    • The tool supports the simultaneous use of user-defined reference sequences alongside predefined ones.

    Conclusions:

    • The NCBI Genotyping tool offers an efficient and user-friendly method for viral sequence genotyping.
    • Its ability to analyze complex recombinant sequences and provide clear graphical output enhances its utility in virological research.
    • This resource facilitates faster and more accurate subtype identification for key viral pathogens.