G-protein coupled receptor signaling

G-protein coupled receptor (GPCR) signaling is a process where a cell detects signals, like hormones or neurotransmitters, through specialized proteins called GPCRs on its surface. When a signal binds to the GPCR, it activates an internal protein called a G protein, which then triggers a cascade of events inside the cell. This can lead to changes in cell activity, such as producing certain chemicals or altering behavior. GPCRs are crucial for many bodily functions, including vision, taste, and immune responses. They serve as essential communication gateways between the outside environment and the cell's interior.