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Updated: May 14, 2025

High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy
Published on: February 7, 2019
Analysis of TF/DNA Binding in T Cells Applying Alpha Technology
Nikolaus Thuille1, Gottfried Baier2
1Department for Genetics, Medical University of Innsbruck, Institute for Cell Genetics, Innsbruck, Austria.
This study introduces bead-based luminescent Alpha technology for analyzing transcription factor DNA-binding. This fast, sensitive method is ideal for studying cellular responses in basic research.
Area of Science:
- Cellular biology
- Molecular biology
- Immunology
Background:
- Transcription factors like NF-kappaB and AP-1 regulate gene expression in T cells.
- Classical methods for studying DNA-binding activities can be time-consuming and less sensitive.
- Accurate measurement of transcription factor activity is crucial for understanding cellular responses.
Purpose of the Study:
- To present bead-based luminescent Alpha technology as a novel method for studying transcription factor DNA-binding.
- To evaluate the sensitivity, speed, and robustness of Alpha technology for NF-kappaB and AP-1.
- To compare Alpha technology with the established Electrophoretic Mobility Shift Assay (EMSA) method.
Main Methods:
- Utilized bead-based luminescent Alpha technology.
- Applied the technology to analyze DNA-binding activities of NF-kappaB and AP-1.
- Tested the method in human and murine T cell models.
- Compared results with classical EMSA.
Main Results:
- Alpha technology demonstrated high sensitivity and speed in detecting DNA-binding activities.
- The method proved robust and reproducible for analyzing NF-kappaB and AP-1.
- Alpha technology offers a time-efficient alternative to EMSA.
Conclusions:
- Bead-based luminescent Alpha technology is a superior tool for studying transcription factor DNA-binding in T cells.
- This technology is suitable for basic research and the study of cellular transcriptional regulatory responses.
- Alpha technology provides a reproducible and efficient alternative to classical EMSA.
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