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| Trimeric G-proteins are transducers which convert a signal from the G-protein linked receptor onto other proteins on the plasma membrane. The trimeric G-protein consists of 3 heterologous subunits named ''alpha, beta'' and ''gamma''. The ''alpha'' subunit is a GTP-ase which binds GDP in its resting state. When the G-protein is activated by an external signal it splits into the activated ''alpha ''subunit (which is now bound to GTP) and the activated ''beta-gamma'' complex. Depending on the signalling pathway, either one of these molecules can be the one to interact with the enzyme in the next step of the cell signalling process.
| | See [[Heterotrimeric G-proteins|Heterotrimeric G-proteins]]<br> |
Latest revision as of 05:12, 30 November 2014