One binding site determines sequence specificity of Tetrahymena pre-rRNA self-splicing, trans-splicing, and RNA enzyme activity.

Journal Article (Journal Article)

The specificity of reactions catalyzed by the Tetrahymena pre-rRNA intervening sequence (IVS) was studied using site-specific mutagenesis. Two sequences required for 5' splice-site selection during self-splicing were defined. Single-base changes in either a 5' exon sequence or a 5' exon-binding site within the IVS disrupt their ability to pair and result in inefficient or inaccurate splicing. Combinations that restore complementarity suppress the effect of the single-base changes. Sequence alterations in the 5' exon-binding site also change the specificity of two other reactions: intermolecular exon ligation (trans-splicing) and the enzymatic nucleotidyltransferase activity of the IVS RNA. Thus the substrate specificity of an RNA enzyme can be changed in a manner predictable by the rules of Watson-Crick base-pairing.

Full Text

Duke Authors

Cited Authors

  • Been, MD; Cech, TR

Published Date

  • October 24, 1986

Published In

Volume / Issue

  • 47 / 2

Start / End Page

  • 207 - 216

PubMed ID

  • 3021333

International Standard Serial Number (ISSN)

  • 0092-8674

Digital Object Identifier (DOI)

  • 10.1016/0092-8674(86)90443-5


  • eng

Conference Location

  • United States