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Science 5 July 1985:
Vol. 229. no. 4708, pp. 79 - 81
DOI: 10.1126/science.4012313
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Articles

Science, Vol 229, Issue 4708, 79-81
Copyright © 1985 by American Association for the Advancement of Science

articles

Ribonuclease P catalysis differs from ribosomal RNA self-splicing

TL Marsh and NR Pace

Two RNA-catalyzed reactions have been described, the Tetrahymena self-splicing ribosomal RNA and ribonuclease P. The Tetrahymena self-splicing reaction proceeds through a transesterification cascade that is dependent upon nucleophilic attacks by ribose 3'-OH groups. Periodate oxidation of the catalytic (or substrate) RNA, which destroys the nucleophilicity of RNA 3' termini, did not inhibit ribonuclease P activity. Thus, catalysis by ribonuclease P differs from the self-splicing reaction.


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The intervening sequence RNA of Tetrahymena is an enzyme.
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