Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 17, Issue 11, Pages 3156-3160Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2007.03.033
Keywords
biosensor; aptazyme; riboswitch
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We constructed a label-free and detector-free aptazyme-based riboswitch sensor for detecting the cofactor of the aptazyme. This riboswitch, which usually suppresses the gene expression with its anti-RBS sequence bound to the RBS of its own mRNA (OFF), activates the translation only when a cofactor is added to release the anti-RBS sequence from itself as a result of cofactor-induced self-cleavage by the aptazyme (ON). The rationally optimized one with beta-galactosidase as a reporter gene enabled us to detect the cofactor of the aptazyme visibly with high ON/OFF efficiency. (C) 2007 Elsevier Ltd. All rights reserved.
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