Definitions for "G protein"
An important class of intracellular signaling molecules that provide the link between activated receptor molecules (such as hormone or neurotransmitter receptors that are not ligand-gated ion channels) and subsequent biochemical events inside target cells. G-proteins are activated when they bind GTP in response to receptor activation.
a protein which has a role in controlling mechanisms within a cell. G proteins interact with adenylate cyclase in controlling the level of adenosine 3', 5' cyclic monophosphate (cAMP) within cells.
One of a group of switch proteins involved in a signaling system that passes incoming messages across cell membranes and within cells.