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Ribosomal frameshifting, jumping and readthrough.

R B Weiss1

  • 1University of Utah, Salt Lake City.

Current Opinion in Cell Biology
|December 1, 1991
PubMed
Summary
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Recent research highlights novel ribosomal frameshifting and readthrough events, including -1 frameshifting at tandem codons and +1 frameshifting at slow codons. Bizarre ribosome jumping and stop-codon readthrough phenomena continue to challenge researchers.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Ribosomes are central to protein synthesis, translating messenger RNA (mRNA) into polypeptide chains.
  • The genetic code is typically read in non-overlapping triplets (codons).
  • However, programmed ribosomal frameshifting and stop-codon readthrough allow for deviations from this standard decoding process, expanding the coding capacity of the genome.

Purpose of the Study:

  • To document and describe newly identified instances of high-level ribosomal frameshift and readthrough events.
  • To characterize the specific mechanisms and sequence contexts associated with these non-canonical translation events.
  • To highlight the complexity and diversity of translational control in gene expression.

Main Methods:

  • Literature review and analysis of recently published studies.

Related Experiment Videos

  • Identification and categorization of reported ribosomal frameshift and readthrough events.
  • Comparative analysis of sequence features and experimental evidence supporting observed events.

    • Main Results:

    • Several new examples of -1 frameshifting occurring at tandem codons have been documented.
    • Novel instances of +1 frameshifting associated with neighboring slow codons have been identified.
    • Unusual cases of ribosome jumping and multiple stop-codon readthrough events have been reported, posing significant research questions.

    Conclusions:

    • The field of translational control continues to reveal complex and unexpected mechanisms.
    • Newly discovered frameshift and readthrough events expand our understanding of how gene expression can be regulated post-transcriptionally.
    • These phenomena underscore the intricate regulatory strategies employed by biological systems and present ongoing challenges for molecular investigation.