G-protein
nounDefinition of G-protein
: any of a class of cell membrane proteins that are coupled to cell surface receptors and upon stimulation of the receptor by an extracellular signaling molecule (such as a hormone or neurotransmitter) bind to GTP to form an active complex which mediates an intracellular event (such as activation of adenylate cyclase)
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More Definitions for G-protein
G protein
noun
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Medical Definition of G protein
: any of a class of cell membrane proteins that are coupled to cell surface receptors and upon stimulation of the receptor by an extracellular molecule (as a hormone or neurotransmitter) bind to GTP to form an active complex which mediates an intracellular event (as activation of adenylate cyclase)