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Related Experiment Videos

A tandem repeat gene in a picornavirus.

S Forss, H Schaller

    Nucleic Acids Research
    |October 25, 1982
    PubMed
    Summary

    Three related viral protein genes (VPg) were found in a tandem repeat within the Foot and Mouth Disease Virus (FMDV) genome. These genes function equally well in vivo, marking the first discovery of a tandem repeat gene in a viral genome.

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    Area of Science:

    • Virology
    • Molecular Biology
    • Genomics

    Background:

    • Picornaviruses, including Foot and Mouth Disease Virus (FMDV), possess a small genome-linked protein (VPg).
    • The genetic organization and duplication of viral genes can impact viral replication and evolution.

    Purpose of the Study:

    • To investigate the genomic structure of VPg genes in FMDV.
    • To determine if multiple VPg genes within a tandem repeat exhibit functional equivalence.

    Main Methods:

    • Sequence analysis of FMDV strains O1K and C1O genomes.
    • Bioinformatic prediction of biochemical properties for VPg gene products.
    • Comparison with existing protein analysis data from FMDV strain A10.

    Main Results:

    • Identification of three closely related VPg genes arranged in a tandem repeat within the FMDV O1K genome.
    • Confirmation of this tandem repeat structure in a different FMDV serotype (C1O).
    • Predicted biochemical properties of the tandemly repeated VPg products align with experimental data, suggesting functional similarity.

    Conclusions:

    • The FMDV genome can accommodate and express multiple functional VPg genes from a tandem repeat.
    • This finding represents the first report of a tandem repeat gene structure in a viral genome.
    • The functional equivalence of these VPg genes suggests potential implications for viral adaptation and evolution.

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