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Related Experiment Videos

In vitro evolution of a self-alkylating ribozyme

C Wilson1, J W Szostak

  • 1Department of Molecular Biology, Massachusetts General Hospital, Boston 02114, USA.

Nature
|April 27, 1995
PubMed
Summary

RNA enzymes, or ribozymes, may have catalyzed early life

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Origin of Life

Background:

  • Early life is hypothesized to have relied on RNA enzymes (ribozymes) for catalyzing all biochemical reactions.
  • The catalytic repertoire of ancient RNA molecules remains an area of active research.

Purpose of the Study:

  • To investigate the potential of RNA enzymes to catalyze reactions beyond those involving the RNA backbone.
  • To search for novel RNA enzymes, specifically alkyl transferases, from random RNA sequences.

Main Methods:

  • In vitro selection was employed to screen a diverse pool of random sequence RNAs.
  • Selection pressure was applied for self-biotinylation activity.
  • Characterization of the selected RNA molecule's catalytic function.

Main Results:

  • A transfer RNA-like ribozyme was successfully selected.
  • This ribozyme demonstrated efficient catalysis of carbon-nitrogen bond formation (an alkyl transferase activity).

Conclusions:

  • Ribozymes are capable of catalyzing reactions beyond RNA backbone modifications.
  • RNA's catalytic potential may extend to a wide array of biochemical transformations.
  • This supports the RNA world hypothesis for the origin of life.

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