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Distinction between AP1 and NF-E2 factor-binding at specific chromatin regions in mammalian cells
P Daftari1, N R Gavva, C K Shen
1Section of Molecular and Cellular Biology, University of California, Davis, California, CA 95616, USA.
Oncogene
|September 28, 1999
Summary
Identifying specific transcription factors bound to DNA is challenging. This study refined a chromatin immunoprecipitation assay to precisely link AP1/NF-E2 family members to distinct DNA regions in living cells.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Nuclear factor-DNA complexes at promoters and enhancers regulate gene transcription.
- Identifying specific DNA-binding factors within families like AP1/NF-E2 in vivo is difficult due to shared motifs.
Purpose of the Study:
- To refine a chromatin immunoprecipitation (ChIP) assay for precise identification of specific transcription factors bound to DNA in vivo.
- To demonstrate the ability to link regulatory functions of specific transcription factors to their binding sites within chromatin.
Main Methods:
- Refinement of a chromatin immunoprecipitation (ChIP) assay.
- Application of the refined ChIP assay to study AP1/NF-E2 transcription factor family members.
Main Results:
- The refined ChIP assay successfully linked regulatory functions of two AP1/NF-E2 family members to specific in vivo chromatin regions.
- Demonstrated the stable binding of these factors within distinct chromatin regions.
Conclusions:
- The study established a feasible general scheme for identifying specific transcription factors among related family members bound to unique DNA sequences in living mammalian cells.
- This method allows direct correlation of factor identity with regulatory function at specific genomic locations.