Glucagon plays a key role in glucose metabolism and homeostasis. Regulates blood glucose by increasing gluconeogenesis and decreasing glycolysis. A counterregulatory hormone of insulin, raises plasma glucose levels in response to insulin-induced hypoglycemia. Plays an important role in initiating and maintaining hyperglycemic conditions in diabetes. Glucagon release is stimulated by hypoglycemia and inhibited by hyperglycemia, insulin, and somatostatin. GLP-1 and GLP-2 are induced in response to nutrient ingestion. Glucagon is secreted in the A cells of the islets of Langerhans. GLP-1, GLP-2, oxyntomodulin and glicentin are secreted from enteroendocrine cells throughout the gastrointestinal tract. GLP1 and GLP2 are also secreted in selected neurons in the brain. Belongs to the glucagon family. Note: This description may include information from UniProtKB.
Protein type: Hormone; Secreted; Secreted, signal peptide
Molecular Function: glucagon receptor binding; hormone activity; identical protein binding; protein binding; receptor binding
Biological Process: cell proliferation; feeding behavior; G-protein coupled receptor protein signaling pathway; G-protein signaling, coupled to cAMP nucleotide second messenger; negative regulation of apoptosis; regulation of insulin secretion; response to starvation; signal transduction