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Abstract

A critical event in the origin of life is thought to have been the emergence of an RNA molecule capable of replicating a primordial RNA “genome.” Here we describe the evolution and engineering of an RNA polymerase ribozyme capable of synthesizing RNAs of up to 95 nucleotides in length. To overcome its sequence dependence, we recombined traits evolved separately in different ribozyme lineages. This yielded a more general polymerase ribozyme that was able to synthesize a wider spectrum of RNA sequences, as we demonstrate by the accurate synthesis of an enzymatically active RNA, a hammerhead endonuclease ribozyme. This recapitulates a central aspect of an RNA-based genetic system: the RNA-catalyzed synthesis of an active ribozyme from an RNA template.

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Published In

Science
Volume 332 | Issue 6026
8 April 2011

Submission history

Received: 22 November 2010
Accepted: 15 February 2011
Published in print: 8 April 2011

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Acknowledgments

We are grateful to M. Daly for assistance with FACS and to our colleagues V. B. Pinheiro, C. Cozens, A. Taylor, and J. Sutherland for helpful discussions. This work was supported by the Medical Research Council (MRC) program grant MC_US_A024_0014.

Authors

Affiliations

Aniela Wochner
Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.
James Attwater
Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.
Alan Coulson
Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.
Philipp Holliger* [email protected]
Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.

Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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