Nucleic Acids Research Advance Access originally published online on June 12, 2007
Nucleic Acids Research 2007 35(12):4179-4185; doi:10.1093/nar/gkm425
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Nucleic Acids Research, 2007, Vol. 35, No. 12 4179-4185
© 2007 The Author(s)
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Tetracycline aptamer-controlled regulation of pre-mRNA splicing in yeast
Lehrstuhl für Mikrobiologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 5, 91058 Erlangen, Germany
*To whom correspondence should be addressed. Tel: +49 9131 852 88 18; Fax: +49 9131 852 80 82; Email: bsuess{at}biologie.uni-erlangen.de
Received April 15, 2007. Revised May 7, 2007. Accepted May 9, 2007.
Splicing of pre-mRNA is a critical step in mRNA maturation and disturbances cause several genetic disorders. We apply the synthetic tetracycline (tc)-binding riboswitch to establish a gene expression system for conditional tc-dependent control of pre-mRNA splicing in yeast. Efficient regulation is obtained when the aptamer is inserted close to the 5'splice site (SS) with the consensus sequence of the SS located within the aptamer stem. Structural probing indicates limited spontaneous cleavage within this stem in the absence of the ligand. Addition of tc leads to tightening of the stem and the whole aptamer structure which probably prevents recognition of the 5'SS. Combination of more then one aptamer-regulated intron increases the extent of regulation leading to highly efficient conditional gene expression systems. Our findings highlight the potential of direct RNA–ligand interaction for regulation of gene expression.
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