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Constitutive cycling: a general mechanism to regulate cell surface proteins
Stephen J Royle1, Ruth D Murrell-Lagnado
1Division of Neurobiology, MRC Laboratory of Molecular Biology, Cambridge, UK. sjr52@mrc-lmb.cam.ac.uk
Summary
Cells rapidly adjust protein levels at the plasma membrane using constitutive cycling. This process is crucial for cell function, impacting processes from memory to homeostasis and disease.
Area of Science:
- Cell biology
- Molecular biology
- Physiology
Background:
- Cells dynamically regulate transmembrane protein levels at the plasma membrane.
- This regulation is essential for diverse physiological functions.
- Constitutive cycling is a key mechanism for rapid protein modulation.
Purpose of the Study:
- To review the molecular mechanisms of constitutive cycling.
- To discuss the regulation of constitutive cycling by extracellular factors.
- To explore the role of misregulated constitutive cycling in disease.
Main Methods:
- Literature review of studies on constitutive cycling.
- Analysis of molecular pathways involved in protein trafficking.
- Examination of evidence linking constitutive cycling to physiological and pathological processes.
Main Results:
- Constitutive cycling involves the continuous internalization and recycling of transmembrane proteins.
- Extracellular agents like hormones can modulate this cycling process.
- Dysregulation of constitutive cycling is implicated in various disease states.
Conclusions:
- Constitutive cycling is a fundamental cellular process for rapid functional adaptation.
- Understanding its regulation offers insights into physiological control and disease pathogenesis.
- Targeting constitutive cycling may present therapeutic opportunities.