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Updated: Jun 1, 2026
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Visualizing Visual Adaptation
Published on: April 24, 2017
Adaptive response and enlargement of dynamic range
Tamar Friedlander1, Naamar Brenne
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel. tamar.friedlander@weizmann.ac.il
Mathematical Biosciences and Engineering : MBE
|June 3, 2011
Summary
Adaptive response in cellular signaling does not guarantee an enlarged dynamic range. Protein modulation, not just adaptation, drives dynamic range expansion through biochemical modifications like methylation and phosphorylation.
Area of Science:
- Cellular signaling
- Biophysics
- Systems biology
Background:
- Membrane channels and receptors show adaptive responses to sustained stimuli.
- Protein activity-dependent inactivation often underlies this desensitization.
- Adaptive responses are linked to cellular homeostasis and dynamic range enlargement.
Purpose of the Study:
- To quantitatively assess the relationship between adaptive response and background compensation.
- To determine if specific adaptive responses are necessary or sufficient for dynamic range enlargement.
- To identify mechanisms driving input dynamic range expansion in signaling systems.
Main Methods:
- Utilized a mathematical modeling framework.
- Analyzed the quantitative relationship between adaptive response and background compensation.
- Investigated the role of protein activity-dependent modulation.
Main Results:
- Adaptive response is neither sufficient nor necessary for adaptive enlargement of dynamic range.
- Precise adaptive responses do not ensure a large dynamic range in input or output.
- Activity-dependent modulation of protein responsiveness is a general mechanism for input dynamic range enlargement.
Conclusions:
- Dynamic range enlargement is driven by activity-dependent protein modulation, not solely by adaptive response type.
- Hierarchical biochemical processes like methylation and phosphorylation are key mechanisms for achieving broad dynamic range.
- Understanding these mechanisms is crucial for comprehending cellular signaling dynamics.
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