G protein

noun
variants: or G-protein \ ˈjē-​ˈprō-​ˌtēn How to pronounce G protein (audio) , -​ˈprō-​tē-​ən \
plural G proteins or G-proteins

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 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)

First Known Use of G protein

1975, in the meaning defined above

History and Etymology for G protein

guanosine triphosphate-binding protein

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Time Traveler for G protein

Time Traveler

The first known use of G protein was in 1975

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Dictionary Entries Near G protein

GPO

G protein

GPS

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Statistics for G protein

Last Updated

23 Aug 2022

Cite this Entry

“G protein.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/G%20protein. Accessed 29 Sep. 2022.

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More Definitions for G protein

G protein

noun
variants: or G-protein \ 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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