Evolutionary Potential of a Duplicated Repressor-Operator Pair
Author Information
Author(s): Frank J. Poelwijk, Daniel J. Kiviet, Sander J. Tans
Primary Institution: FOM Institute for Atomic and Molecular Physics (AMOLF), Amsterdam, Netherlands
Hypothesis
What are the evolutionary pathways and selective conditions that allow divergence after gene duplication?
Conclusion
The study shows that duplicated repressors can evolve to achieve independent regulatory interactions with early increases in fitness.
Supporting Evidence
- The study provides a mechanistic rationale for rapid divergence under minimal selective conditions.
- Intermediate phenotypes can be predicted using published measurements of Escherichia coli mutants.
- The findings underscore the importance of coevolutionary mechanisms in regulatory networks.
Takeaway
When genes duplicate, they can change over time to do different jobs, and this study shows how that can happen step by step.
Methodology
The study used computational simulations to explore the divergence of duplicated repressors and their binding sites based on measured repression strengths.
Limitations
The simulations are limited by the number of base pairs that can be mutated and linked to experimental data.
Digital Object Identifier (DOI)
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