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Related Experiment Videos

Making (anti)sense of non-coding sequence conservation

D J Lipman1

  • 1National Center for Biotechnology Information, National Library of Medicine, NIH, Building 38A 8N803, 8600 Rockville Pike, Bethesda, MD 20894, USA. lipman@ncbi.nlm.nih.gov

Nucleic Acids Research
|September 15, 1997
PubMed
Summary
This summary is machine-generated.

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Conserved sequences in messenger RNAs (mRNAs) may function by forming duplexes with antisense transcripts, influencing mRNA stability and regulation. This interaction explains sequence conservation by preventing harmful genetic variations.

Area of Science:

  • Molecular Biology
  • Genomics
  • RNA Biology

Background:

  • Vertebrate messenger RNAs (mRNAs) possess long conserved sequence blocks in untranslated and coding regions.
  • The function of these unique genomic sequences remains largely unexplained.
  • Experimental data links these regions to messenger RNA (mRNA) stability regulation.

Purpose of the Study:

  • To propose a functional role for conserved sequences in mRNA untranslated and coding regions.
  • To integrate findings on mRNA stability with data on endogenous antisense transcripts.
  • To explain the evolutionary conservation of these unique sequence blocks.

Main Methods:

  • Literature review integrating experimental data on mRNA stability.
  • Synthesis of data on endogenous antisense transcripts.

Related Experiment Videos

  • Hypothesis generation based on existing biological knowledge.

    • Main Results:

    • Proposed hypothesis: Conserved mRNA sequences form long, perfect duplexes with antisense transcripts.
    • These duplexes are potentially recognized by post-transcriptional regulatory systems.
    • Allelic divergence may be selected against due to dominant negative effects.

    Conclusions:

    • The formation of mRNA-antisense duplexes offers a functional explanation for conserved sequences.
    • This mechanism links sequence conservation to post-transcriptional regulation and mRNA stability.
    • Selection against detrimental genetic variations likely drives the observed conservation patterns.