Related Experiment Videos
Footprinting with UV irradiation and LMPCR
1Department of Biology, Beckman Research Institute of the City of Hope, Duarte, California 91010, USA. gpfeifer@smtplink.coh.orgp5
Methods (San Diego, Calif.)
|February 1, 1997
Summary
UV photofootprinting, combined with ligation-mediated polymerase chain reaction (LMPCR), offers a sensitive method for analyzing protein-DNA interactions in vivo. This technique detects a wide range of transcription factor contacts with high resolution.
Area of Science:
- Molecular Biology
- Genomics
- Biochemistry
Background:
- Analyzing protein-DNA interactions is crucial for understanding gene regulation.
- Genomic sequencing techniques offer nucleotide-level resolution for these analyses.
- Ligation-mediated polymerase chain reaction (LMPCR) is a highly sensitive method for signal amplification in genomic studies.
Purpose of the Study:
- To detail the use of UV irradiation for in vivo footprinting.
- To demonstrate the compatibility of UV photofootprinting with LMPCR.
- To establish UV light as a generally useful tool for in vivo footprinting.
Main Methods:
- UV irradiation of mammalian cells to induce DNA photoproducts.
- Analysis of UV-induced DNA photoproducts (cyclobutane pyrimidine dimers and (6-4) photoproducts) using LMPCR.
- Comparison of UV photofootprinting with other probing techniques.
Main Results:
- UV photofootprinting, analyzed by LMPCR, can detect a wide variety of protein-DNA contacts.
- The method is sensitive and provides nucleotide-level resolution.
- UV light has the potential to reveal all protein-DNA interactions at dipyrimidine sites.
Conclusions:
- UV photofootprinting is a simple, nondisruptive, and effective method for in vivo footprinting.
- The technique can detect numerous transcription factors.
- UV photofootprinting combined with LMPCR is a valuable tool for studying protein-DNA interactions.