GTP-binding protein

GTP-binding protein
any of a number of regulatory proteins, including the G proteins and the monomeric small GTP-binding proteins, in which the exchange of GDP for GTP induces a conformational change to produce an active state, while the hydrolysis of GTP to GDP produces an inactive state. GTP-binding proteins act as switches that couple cell-surface receptor activation with intracellular processes such as protein synthesis.

Medical dictionary. 2011.

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