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Horizontal transfer of DNA methylation patterns into bacterial chromosomes
Jung-Eun Shin1, Chris Lin1, Han N Lim2
1Department of Integrative Biology, University of California Berkeley, CA 94720-3140, USA.
Nucleic Acids Research
|April 17, 2016
Summary
Horizontal gene transfer (HGT) can now transfer DNA methylation patterns into bacterial chromosomes. This epigenetic reprogramming influences cell phenotypes and fitness, impacting bacterial evolution and synthetic biology applications.
Area of Science:
- Bacteriology
- Epigenetics
- Synthetic Biology
Background:
- Horizontal gene transfer (HGT) is crucial for bacterial adaptation, enabling rapid acquisition of traits like antibiotic resistance.
- DNA methylation patterns play a role in regulating gene expression and cellular phenotypes in bacteria.
Purpose of the Study:
- To investigate if DNA methylation patterns can be horizontally transferred into bacterial chromosomes.
- To determine if transferred methylation patterns can program cell phenotypes and affect fitness.
Main Methods:
- Utilized a synthetic system in Escherichia coli with a fluorescent reporter (CFP) linked to the agn43 gene's cis-regulatory sequence.
- Demonstrated HGT of methylation patterns via bacteriophage P1 transduction and transformation of extracellular DNA.
- Replaced CFP with SgrS small RNA to assess fitness consequences of transferred methylation patterns.
Main Results:
- DNA methylation patterns were successfully transferred into bacterial chromosomes through HGT mechanisms.
- Transferred methylation patterns altered the expression of reporter genes and small RNAs.
- Horizontally acquired methylation patterns influenced bacterial cell fitness, leading to selection for or against HGT.
Conclusions:
- DNA methylation patterns are mobile genetic elements that can be transferred via HGT.
- Epigenetic reprogramming through HGT can significantly impact bacterial phenotypes and evolution.
- This study provides a foundation for synthetic biology applications and understanding bacterial adaptation.
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