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Toeprinting Analysis of Translation Initiation Complex Formation on Mammalian mRNAs
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Mechanisms suppressing noncoding translation.

Jordan S Kesner1, Xuebing Wu1

  • 1Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA.

Trends in Cell Biology
|October 23, 2024
PubMed
Summary
This summary is machine-generated.

Cells can translate noncoding DNA into proteins, potentially causing harm. This review highlights how the BAG6 pathway suppresses this noncoding translation, protecting cells from toxic protein production.

Keywords:
BAG6noncoding sequencenoncoding translationprotein quality controlribosome

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Most genomic DNA is noncoding, yet translation occurs in these regions, including long noncoding RNAs (lncRNAs), UTRs, and introns.
  • The cellular mechanisms for suppressing translation from noncoding sequences are not well understood.
  • Uncontrolled translation of noncoding sequences can lead to the production of potentially toxic proteins.

Purpose of the Study:

  • To review and summarize the known mechanisms for mitigating noncoding translation.
  • To highlight the role of the BCL2-associated athanogene 6 (BAG6) pathway as a key suppressor of noncoding translation.

Main Methods:

  • Review of existing literature on noncoding translation and its regulation.
  • Analysis of genome-wide ribosome footprinting data.
  • Focus on proteasomal degradation pathways involved in protein suppression.

Main Results:

  • Widespread translation is observed in annotated noncoding genomic sequences.
  • The BCL2-associated athanogene 6 (BAG6) pathway is identified as a crucial mechanism.
  • BAG6-mediated proteasomal degradation effectively suppresses translation from diverse noncoding sequences.

Conclusions:

  • Noncoding translation poses a potential risk due to toxic protein synthesis.
  • The BAG6 pathway represents a conserved, unifying mechanism in metazoan cells to suppress noncoding translation.
  • Understanding these suppression mechanisms is vital for comprehending cellular homeostasis and preventing disease.