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Controllable Ion Channel Expression through Inducible Transient Transfection
Published on: February 17, 2017
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Development of a high efficient promoter finding method based on transient transfection.
Yao Lu1, Qilong Li1, Kexin Zheng2
1College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, PR China.
Gene
|September 17, 2021
Summary
This study introduces a novel, efficient method for identifying gene promoters in vitro. The promoter-trap library successfully detected active promoter fragments and their downstream transcripts, aiding gene expression studies.
Area of Science:
- Genomics
- Molecular Biology
- Gene Regulation
Background:
- Gene expression regulation is spatiotemporal in metazoans.
- Active promoters exhibit specific chromosomal features like DNaseI hypersensitivity and histone modifications.
Purpose of the Study:
- To propose and validate a novel, high-efficiency method for identifying gene promoters in vitro.
- To screen and confirm promoter-active DNA fragments and their downstream transcripts.
Main Methods:
- Construction of a promoter-trap library with 706 random mouse genomic DNA fragments.
- Screening of 260 promoter-active fragments via transient transfection into 4T1 cells.
- Validation using DNase-seq, ChIP-seq, and qRT-PCR on 13 selected fragments.
Main Results:
- 260 promoter-active fragments were identified from the library.
- Analysis of 13 fragments confirmed promoter activity and predicted downstream transcripts.
- Six predicted transcription units were successfully amplified in various mouse tissues and tumors.
Conclusions:
- The developed method efficiently detects promoter-active fragments in vitro.
- This approach successfully identifies downstream transcripts, aiding gene expression research.
- The findings validate the promoter-finding method's accuracy and utility.
