Glucagon receptor

Glucagon receptor is a protein that in humans is encoded by the GCGR gene. It is a member of the G protein-coupled receptor family of proteins, which play a crucial role in cell signaling and are involved in a wide range of physiological processes.

Function

The glucagon receptor is a 62 kDa protein that is activated by glucagon, a hormone produced by the pancreas. Upon activation, the receptor stimulates adenylate cyclase to increase levels of cyclic AMP, leading to increased glucose production by the liver. This process is a key component of the body's response to low blood sugar levels.

Structure

The glucagon receptor is a seven-transmembrane domain protein, typical of G protein-coupled receptors. The extracellular domain binds glucagon, while the intracellular domain interacts with G proteins to transmit the signal into the cell.

Clinical significance

Mutations in the GCGR gene can lead to conditions such as hyperglucagonemia and glucagonoma, both of which are characterized by elevated levels of glucagon. In addition, the glucagon receptor is a potential target for the treatment of type 2 diabetes, as blocking its activity could reduce glucose production and thus lower blood sugar levels.

See also

• Glucagon
• G protein-coupled receptor
• Type 2 diabetes

References

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