Related Experiment Video
Updated: Aug 19, 2026

Mapping the Binding Site of an Aptamer on ATP Using MicroScale Thermophoresis
Published on: January 7, 2017
Inhibition of the DNA binding by the TCF-1 binding RNA aptamer
Min Woo Park1, Kang Hyun Choi, Sunjoo Jeong
1Department of Molecular Biology, Institute of Nanosensor and Biotechnology, Dankook University, Seoul 140-714, Republic of Korea.
Abstract:
The DNA binding architectural protein, TCF, and the transcriptional activator, beta-catenin, form a complex that regulates the expression of diverse target genes during early development and carcinogenesis. As an approach to modulating transcription by this complex, we selected an RNA aptamer that binds to the DNA binding domain of TCF-1. The aptamer interfered with the binding of TCF-1 to its specific DNA recognition sequences in vitro and also inhibited DNA binding of cellular TCF-1. We also developed the truncated version of the aptamer for efficient delivery to the cells. Structural analysis of the truncated aptamer revealed that a stem-loop with an internal loop was responsible for the binding to TCF-1. Similar approach may well be applicable to other proteins, especially DNA binding transcription factors, in order to modulate their DNA binding and transcriptional activity in the cells.
More Related Videos
09:00An In Vitro Enzymatic Assay to Measure Transcription Inhibition by Gallium(III) and H3 5,10,15-tris(pentafluorophenyl)corroles
Published on: March 18, 2015
06:43A Quantitative Assay to Study Protein:DNA Interactions, Discover Transcriptional Regulators of Gene Expression, and Identify Novel Anti-tumor Agents
Published on: August 31, 2013
Related Concept Videos
Eukaryotic Transcription Inhibitors
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Targeted Cancer Therapies
There are several types of targeted therapies against specific...
Transcription Attenuation in Prokaryotes
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
Cooperative Binding of Transcription Regulators
Cooperative Binding of Transcription Regulators
Inhibitors of Bacterial DNA Synthesis