Binary Gene Induction and Protein Expression in Individual Cells
Author Information
Author(s): Zhang Qiang, Andersen Melvin E, Conolly Rory B
Primary Institution: CIIT Centers for Health Research
Hypothesis
Does the choice of reporter genes affect the observed protein expression patterns in individual cells during gene induction?
Conclusion
The choice of reporter genes may determine whether protein expression is binary, graded or hybrid, even though gene induction itself operates in an all-or-none fashion.
Supporting Evidence
- The study confirmed that the lifetimes of active/inactive promoters and half-lives of downstream mRNA/protein products are important determinants of protein expression patterns.
- Graded gene expression is more likely to be observed with GFP, a longer-lived protein with low detection sensitivity.
- The interplay between mRNA and protein half-lives, the lifetime of transcriptionally active promoters, and detection sensitivity shapes the dynamics of protein expression.
Takeaway
This study shows that how genes turn on and off can look different depending on the tools we use to measure them, like different types of reporter proteins.
Methodology
A computational model of stochastic gene expression was used to analyze the effects of various parameters on protein expression patterns.
Limitations
The study primarily relies on computational simulations, which may not fully capture the complexity of biological systems.
Digital Object Identifier (DOI)
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