Signal Transduction
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May 1, 2024
3 minute read
Signal transduction is a complex and fundamental process in living organisms that enables cells to communicate with each other and respond to external stimuli. It involves the conversion of extracellular signals into intracellular responses, thereby coordinating cellular activities and maintaining homeostasis.
Components of Signal Transduction
Signal transduction pathways consist of several key components:
- Ligand: A molecule that binds to a receptor protein and initiates the signaling cascade.
- Receptor: A protein that binds to a specific ligand and triggers intracellular events.
- Signal transducer: A protein that transmits the signal from the receptor to the effector.
- Effector: A protein that produces a specific cellular response, such as gene expression or protein synthesis.
- Second messenger: A small molecule that relays the signal within the cell.
Types of Signal Transduction Pathways
There are various types of signal transduction pathways, each with its unique mechanisms and functions:
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