G protein

noun
\ ˈjē- How to pronounce G protein (audio) \

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)

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Cite this Entry

“G protein.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/G%20protein. Accessed 27 Nov. 2020.

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