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Related Experiment Videos

Ribosome-catalyzed polyester formation.

S Fahnestock, A Rich

    Science (New York, N.Y.)
    |July 23, 1971
    PubMed
    Summary
    This summary is machine-generated.

    Deamination of phenylalanyl-transfer RNA creates a phenyllactyl-transfer RNA analog. This analog, when used in protein synthesis, forms a phenyllactic acid polyester chain.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • RNA Chemistry

    Background:

    • Transfer RNA (tRNA) plays a crucial role in protein synthesis by carrying amino acids to the ribosome.
    • Chemical modification of tRNA can alter its properties and interactions within the protein synthesis machinery.

    Purpose of the Study:

    • To investigate the consequences of deaminating phenylalanyl-tRNA.
    • To determine if the resulting analog can be incorporated into a polypeptide chain.

    Main Methods:

    • Phenylalanyl-tRNA was deaminated using nitrous acid to form phenyllactyl-tRNA.
    • The modified tRNA was incubated in a cell-free protein synthesis system directed by polyuridylic acid.

    Main Results:

    • Deamination successfully produced the phenyllactyl-tRNA analog.

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  • The phenyllactyl-tRNA analog was incorporated into an acid-precipitable, alkali-labile polyester chain, indicating polymerization of phenyllactic acid.

    • Conclusions:

    • The alpha-hydroxyacyl analog of phenylalanyl-tRNA can be recognized and utilized by the protein synthesis machinery.
    • This demonstrates the potential for incorporating non-natural amino acid analogs into polypeptide chains via tRNA-mediated synthesis.