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Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts
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Deciphering disordered regions controlling mRNA decay in high-throughput.

Joseph H Lobel1, Nicholas T Ingolia2,3

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA.

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Summary
This summary is machine-generated.

Intrinsically disordered protein regions control gene expression by influencing mRNA stability and translation. Aromatic residue patterns are key molecular features driving this regulation, often by interacting with mRNA decay pathways.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Intrinsically disordered regions (IDRs) in proteins perform crucial functions without a fixed structure.
  • The mechanisms by which IDRs regulate messenger RNA (mRNA) stability and translation are not well understood.

Purpose of the Study:

  • To identify the molecular features and pathways through which intrinsically disordered protein regions control gene expression.
  • To elucidate how these regions impact mRNA stability and translation.

Main Methods:

  • High-throughput functional profiling of hundreds of regulatory disordered elements.
  • Systematic mutagenesis and machine learning analysis to identify key molecular features.
  • Biochemical assays to investigate interactions with mRNA decay machinery.

Main Results:

  • A complex pattern of molecular features, particularly the presence and arrangement of aromatic residues, strongly predicts the regulatory activity of IDRs.
  • Diverse protein sequences with similar aromatic residue patterns exhibit comparable effects on mRNA stability and translation.
  • Many IDRs exert their regulatory function by interacting with core components of the mRNA decay machinery.

Conclusions:

  • The study defines specific molecular features and biochemical pathways responsible for gene expression regulation by intrinsically disordered protein regions.
  • Findings provide insights into the broader principles governing the function of unstructured proteins in cellular processes.