title: An RNA-based transcription activator derived from an inhibitory aptamer.
abstract: According to the recruitment model of transcriptional activation, an activator helps initiate transcription by bringing the RNA polymerase to a specific location on the DNA through interaction with components of the transcriptional machinery. However, it is difficult to isolate and define the activities of specific activator-target pairs experimentally through rearranging existing protein parts. Here we designed and constructed an RNA-based transcriptional activator to study specificity from both sides of the activator-target interface. Utilizing a well-characterized site-specific RNA aptamer for TFIIB, we were able to delineate some key features of this process. By rationally converting an inhibitory aptamer into the activation domain of the activator, we also introduced a new source of submolecular building blocks to synthetic biology.
authors.affiliation: Department of Biological Sciences and Institute for RNA Science and Technology, University at Albany, State University of New York, Albany, NY 12222, USA.
authors.forename: Shengchun
authors.initials: S
authors.lastname: Wang
authors.forename: Jason R E
authors.initials: JR
authors.lastname: Shepard
authors.forename: Hua
authors.initials: H
authors.lastname: Shi
mesh_terms: D052157:Aptamers, Nucleotide / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D001483:Base Sequence; D008969:Molecular Sequence Data; D012313:RNA / Q000737:chemistry*; D012441:Saccharomyces cerevisiae / Q000235:genetics; D015534:Trans-Activators / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D035581:Transcription Factor TFIIB / Q000378:metabolism; D015533:Transcriptional Activation
chemical_list: D052157:Aptamers, Nucleotide; D015534:Trans-Activators; D035581:Transcription Factor TFIIB; D012313:RNA