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- ***************************************
- * Pancreatic hormone family signature *
- ***************************************
-
- Pancreatic hormone (PP) [1] is a peptide synthesized in pancreatic islets of
- Langherhans, which acts as a regulator of pancreatic and gastrointestinal
- functions. A number of other active peptides are homologous to pancreatic
- hormone:
-
- - Neuropeptide Y (NPY) [2], one of the most abundant peptides in the
- mammalian nervous system. NPY is implicated in the control of feeding and
- the secretion of the gonadotrophin-releasing hormone.
- - Peptide YY (PYY) [3]. PPY is a gut peptide that inhibits exocrine
- pancreatic secretion, has a vasoconstrictory action and inhibits jejunal
- and colonic mobility.
- - Various NPY and PYY-like polypeptides from fish and amphibians [4,5].
-
- All these peptides are thirty six amino acids long. Like most active
- peptides, their C-terminal is amidated and they are synthesized as larger
- protein precursors. The signature for these peptides is based on the last
- twelve C-terminal residues, where five positions are completely conserved.
-
- -Consensus pattern: [RQ]-x-Y-x-N-x-[LIVM]-T-R-x-R-[YF]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for pancreatic hormone from goose and from frogs.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: December 1992 / Pattern and text revised.
-
- [ 1] Blundell T.L., Humber R.E.
- Nature 287:781-787(1980).
- [ 2] Allen J., Novotny J., Martin J., Heinrich G.
- Proc. Natl. Acad. Sci. U.S.A. 84:2532-2536(1987).
- [ 3] Tatemoto K.
- Proc. Natl. Acad. Sci. U.S.A. 79:2514-2518(1982).
- [ 4] Jensen J., Conlon J.M.
- Eur. J. Biochem. 210:405-410(1992).
- [ 5] Conlon J.M., Chartrel N., Vaudry H.
- Peptides 13:145-149(1992).
-