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Updated: Jul 28, 2026
10:13
Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding
Published on: June 9, 2017
G protein-coupled receptor signaling: implications for the digestive system
1Department of Surgery, University of California, San Francisco, USA.
Digestive Diseases (Basel, Switzerland)
|July 1, 1997
Summary
Cellular signaling relies on protein complexes that transmit external signals into cells. Aberrant signal transduction contributes to diseases like heart failure and gut disorders.
Area of Science:
- Molecular Biology
- Cellular Biology
- Biochemistry
Background:
- Extracellular signaling molecules regulate cellular functions through complex protein assemblies.
- These assemblies include receptors, G proteins, effectors, and inactivating enzymes.
- Signal transduction pathways are crucial for cellular communication and response.
Purpose of the Study:
- To examine the structure and function of signal transduction assemblies.
- To investigate the mechanisms of signal initiation, propagation, and termination.
- To analyze specific systems like beta 2-adrenergic and substance P transducers.
Main Methods:
- Analysis of receptor-ligand binding and G protein activation cycles.
- Investigation of effector enzyme activity and second messenger generation.
- Examination of signal termination mechanisms, including receptor regulation and protein modifications.
Main Results:
- Signal initiation involves receptor binding, G protein cycling, and effector activation.
- Signal transduction leads to altered second messenger levels and cellular responses.
- Multiple mechanisms exist to terminate signaling pathways, ensuring cellular homeostasis.
Conclusions:
- Signal transduction pathways are tightly regulated with multiple on and off switches.
- Dysregulation of these pathways is implicated in various diseases, including heart failure and gastrointestinal disorders.
- Understanding these systems is vital for developing therapeutic strategies for related pathologies.
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