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cell surface receptor that transmits external signals inside cells

A G-protein coupled receptor (GPCR) is a type of cell surface receptor that plays a crucial role in transmitting signals from outside the cell to the inside. When a molecule, such as a hormone or neurotransmitter, binds to a GPCR, it activates an associated G-protein, which then triggers various cellular responses. This mechanism is essential for many physiological processes, including sensory perception, immune response, and cell communication.

Related Terms

• cell surface receptor
• signal transduction
• seven-transmembrane receptor
• Leucine-rich repeat-containing G-protein coupled receptor