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Defining the sequence-recognition profile of DNA-binding molecules.
Christopher L Warren1, Natasha C S Kratochvil, Karl E Hauschild
1Department of Biochemistry, University of Wisconsin, Madison, WI 53706, USA.
Summary
This study introduces a high-throughput DNA-binding analysis method to profile DNA-binding molecules. The platform rapidly determines sequence preferences for engineered small molecules and transcription factors.
Area of Science:
- Molecular Biology
- Biochemistry
- Genomics
Background:
- Characterizing DNA-binding proteins and small molecules is crucial but challenging.
- Understanding sequence-recognition properties is key for molecular biology and drug discovery.
- Current methods often lack high-throughput capabilities for comprehensive profiling.
Purpose of the Study:
- To develop a high-throughput approach for comprehensive DNA-binding profiling.
- To determine the full molecular recognition profile of DNA-binding molecules.
- To investigate sequence-recognition landscapes influenced by molecular interactions.
Main Methods:
- A microfabricated array displaying all DNA sequence permutations (up to 10 variants).
- Simultaneous interrogation of the entire DNA sequence space.
- Rapid, unbiased, and unsupervised affinity determination for DNA-binding molecules.
Main Results:
- Full molecular recognition profiles for an engineered small molecule and a eukaryotic transcription factor.
- Identification of altered sequence-recognition landscapes due to cooperative assembly in ternary complexes.
- Array analysis findings were strongly corroborated by solution studies.
Conclusions:
- The developed high-throughput platform enables comprehensive DNA-binding profiling.
- This method provides insights into molecular recognition and cooperative binding.
- The approach accelerates the understanding of DNA-protein and DNA-small molecule interactions.