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Published on: April 21, 2023
Using targeted chromatin regulators to engineer combinatorial and spatial transcriptional regulation
Albert J Keung1, Caleb J Bashor1, Szilvia Kiriakov2
1Department of Biomedical Engineering and Center of Synthetic Biology, Boston University, Boston, MA 02215, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.
Researchers engineered chromatin regulators (CRs) to understand gene transcription control. This synthetic biology approach revealed complex regulatory logic, offering design principles for cellular engineering.
Area of Science:
- Molecular Biology
- Synthetic Biology
- Genetics
Background:
- Eukaryotic transcription is primarily controlled by chromatin.
- The coordination of diverse chromatin regulator (CR) proteins in regulating transcription is not fully understood.
Purpose of the Study:
- To decipher the complexity of chromatin regulation using a synthetic biology approach.
- To investigate emergent transcriptional behaviors from engineered patterns of CRs.
Main Methods:
- Fused 223 yeast CRs to programmable zinc finger proteins.
- Utilized site-specific and combinatorial recruitment of CRs to distinct intralocus locations.
Main Results:
- Observed diverse transcriptional logic and behaviors, including synergistic activation, long-range and spatial regulation, and gene expression memory.
- Established design principles for engineering transcriptional regulation by comparing observed behaviors with CR functions.
Conclusions:
- This study provides a bottom-up approach to understanding chromatin-mediated transcriptional regulation.
- Introduced novel chromatin-based components and systems for synthetic biology and cellular engineering.
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