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Updated: Jan 18, 2026
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Spatiotemporal Control of Protein Activity through Optogenetic Allosteric Regulation
Published on: October 4, 2024
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Allostery Beyond Amplification: Temporal Regulation of Signaling Information
Pedro Pessoa1,2, Steve Pressé1,2,3, S Banu Ozkan1,2
1Center for Biological Physics, Arizona State University, Tempe, AZ, USA.
Arxiv
|January 16, 2026
Summary
Allostery regulates more than just protein activity; it controls the timing and duration of information flow in signaling pathways. This mechanism allows for distinct biological outcomes using identical components, enhancing signaling specificity and coordination.
Area of Science:
- Biochemistry
- Systems Biology
- Molecular Biology
Background:
- Allostery is a key protein regulation mechanism, typically viewed as controlling enzyme activity or product levels.
- This traditional understanding may not fully capture the scope of allosteric functions.
Purpose of the Study:
- To investigate the role of allostery beyond steady-state modulation.
- To quantify the information transmission regulated by allosteric mechanisms in signaling pathways.
Main Methods:
- Development of a stochastic model for allosteric regulation.
- Application of information-theoretic analysis to quantify mutual information.
- Analysis of the temporal dynamics of signaling components.
Main Results:
- Allosteric regulation influences not only steady-state production but also the timing and duration of information transmission.
- Mutual information between enzyme regulatory states and downstream components was quantified.
- Allosteric control over temporal dynamics enables distinct pathway behaviors.
Conclusions:
- Allostery provides a physical basis for temporal information flow, enhancing signaling specificity and coordination.
- The temporal operating regime of signaling pathways can be tuned by allosteric regulation.
- This reveals a broader role for allostery in biological systems beyond metabolic control.
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