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Secretin is a hormone that regulates water homeostasis throughout the body and influences the environment of the duodenum by regulating secretions in the stomach, pancreas, and liver. It is a peptide hormone produced in the S cells of the duodenum, which are located in the intestinal glands. [5] In humans, the secretin peptide is encoded by the ...
The structure of glucagon itself is fully conserved in all mammalian species in which it has been studied. [3] Other members of the structurally similar group include secretin , gastric inhibitory peptide , vasoactive intestinal peptide , prealbumin , peptide HI-27, and growth hormone releasing factor .
In addition to the secretin protein, 10–15 other inner and outer membrane proteins compose the full secretion apparatus, many with as yet unknown function. Gram-negative type IV pili use a modified version of the type II system for their biogenesis, and in some cases certain proteins are shared between a pilus complex and type II system ...
The gastrointestinal hormones [3] can be divided into three main groups based upon their chemical structure. Gastrin–cholecystokinin family: gastrin and cholecystokinin; Secretin family: secretin, glucagon, vasoactive intestinal peptide and gastric inhibitory peptide; Somatostatin family; Motilin family; Substance P.
The Secretin family are peptides that act as local hormones which regulate activity of G-protein coupled receptors. Most often found in the pancreas and the intestines. Secretin was discovered in 1902 by E. H. Starling. It was later linked to chemical regulation and was the first substance to be deemed a hormone. [8] Secretin; Glucagon ...
The secretin-receptor family GPCRs exist in many animal species. Data mining with the Pfam signature has identified members in fungi, although due to their presumed non-hormonal function they are more commonly referred to as Adhesion G protein-coupled receptors , making the Adhesion subfamily the more basal group. [ 6 ]
Vasoactive intestinal peptide, also known as vasoactive intestinal polypeptide or VIP, is a peptide hormone that is vasoactive in the intestine. VIP is a peptide of 28 amino acid residues that belongs to a glucagon/secretin superfamily, the ligand of class II G protein–coupled receptors. [5]
The secretin receptor is a protein that in humans is encoded by the SCTR gene. This protein is a G protein-coupled receptor which binds secretin and is the leading member ( i.e. , first cloned) of the secretin receptor family , also called class B GPCR subfamily.