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Folding of RNA involves parallel pathways

J Pan1, D Thirumalai, S A Woodson

  • 1Department of Chemistry and Biochemistry, University of Maryland, College Park 20742-2021, USA.

Journal of Molecular Biology
|November 21, 1997
PubMed
Summary
This summary is machine-generated.

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Large RNA folding is complex. This study reveals Tetrahymena RNA folds via parallel paths, with some molecules rapidly reaching their native state while others require partial unfolding from misfolded structures.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Structural Biology

Background:

  • Investigating the folding kinetics of large RNAs is a nascent field.
  • Understanding RNA folding pathways is crucial for predicting structure and function.

Purpose of the Study:

  • To investigate the folding kinetics of the Tetrahymena self-splicing RNA.
  • To determine if large RNAs can fold via multiple pathways.

Main Methods:

  • Kinetic analysis of RNA folding.
  • Characterization of misfolded RNA structures.
  • Assessment of folding yield under varying conditions (annealing, denaturing).

Main Results:

  • Tetrahymena RNA partitions into rapidly folding and slowly folding populations.

Related Experiment Videos

  • Slowly folding RNA is trapped in metastable misfolded states.
  • Partial unfolding facilitates transitions from misfolded to native states.
  • Iterative annealing and mild denaturing conditions enhance native RNA yield and folding rates.

    • Conclusions:

    • The Tetrahymena self-splicing RNA demonstrates folding via multiple parallel pathways.
    • RNA folding can involve transitions through misfolded intermediates requiring partial unfolding.
    • Optimizing conditions can improve the efficiency and rate of large RNA folding.