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Related Experiment Videos

Recombination in RNA.

A M King, D McCahon, W R Slade

    Cell
    |July 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Aphthoviruses recombine RNA to create genetic diversity. Analysis of recombinant viruses revealed RNA crossovers, confirming recombination as a key mechanism for picornavirus evolution.

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    Area of Science:

    • Virology
    • Molecular Biology
    • Genetics

    Background:

    • Aphthoviruses possess a single-stranded RNA genome encoding all viral proteins.
    • Genetic recombination is a known mechanism for generating diversity in RNA viruses.

    Purpose of the Study:

    • To investigate RNA recombination in aphthoviruses.
    • To identify the mechanisms and sites of recombination within the aphthovirus genome.

    Main Methods:

    • Generating recombinant aphthoviruses from cells co-infected with temperature-sensitive mutants.
    • Analyzing induced viral proteins to determine genetic inheritance patterns.
    • Utilizing RNAase T1 fingerprinting to confirm RNA crossover sites.

    Main Results:

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  • Two distinct patterns of protein inheritance were observed in recombinant viruses, indicating single genetic crossovers.
  • Crossovers occurred on the 5' and 3' sides of the central P34-coding region.
  • RNAase T1 fingerprinting confirmed the deduced crossover sites, providing molecular evidence of RNA recombination.

    • Conclusions:

    • RNA recombination is a significant mechanism for generating genetic diversity in aphthoviruses.
    • Recombination events in aphthoviruses occur at specific sites within the RNA genome.
    • This study provides molecular evidence for RNA recombination in picornaviruses, highlighting its evolutionary importance.