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Related Experiment Videos

An adenovirus agnogene.

A Virtanen, P Aleström, H Persson

    Nucleic Acids Research
    |April 24, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Adenovirus type 2's i-leader sequence was determined, revealing a 440-nucleotide segment with a translational reading frame. This finding suggests the i-leader is utilized for protein translation, unlike other adenovirus leader segments.

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    Area of Science:

    • Molecular Biology
    • Virology
    • Genomics

    Background:

    • Adenovirus type 2 genome contains various RNA segments.
    • The function of the i-leader segment in gene expression is not fully understood.

    Purpose of the Study:

    • To determine the nucleotide sequence of a specific segment of the adenovirus type 2 genome.
    • To investigate the potential translational role of the adenovirus i-leader.

    Main Methods:

    • Nucleotide sequencing of a 550 base pair genomic segment.
    • S1 nuclease mapping and cDNA sequence analysis of adenovirus mRNA.
    • In vitro translation of selected mRNA and polypeptide analysis.

    Main Results:

    • The 550 base pair sequence includes the 440-nucleotide i-leader, spliced to adenovirus mRNAs.

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  • The i-leader contains an open translational reading frame (440 nucleotides).
  • A polypeptide matching the predicted molecular weight was produced via in vitro translation of i-leader-containing mRNA.

    • Conclusions:

    • The adenovirus type 2 i-leader segment possesses a functional translational reading frame.
    • The i-leader is likely used for protein translation, a unique role among adenovirus leader segments.