Leucyl-Cystinyl Aminopeptidase (LNPEP) ELISA Kit for Chicken

This gene encodes a zinc-dependent aminopeptidase that cleaves vasopressin, oxytocin, lys-bradykinin, met-enkephalin, dynorphin A and other peptide hormones. The protein can be secreted in maternal serum, reside in intracellular vesicles with the insulin-responsive glucose transporter GLUT4, or form a type II integral membrane glycoprotein. The protein catalyzes the final step in the conversion of angiotensinogen to angiotensin IV (AT4) and is also a receptor for AT4. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

IRAP: a leucyl/cystinyl aminopeptidase. A type II membrane protein and secreted. Resides in intracellular vesicles together with GLUT4 and can then translocate to the cell surface in response to insulin and/or oxytocin. Degrades peptide hormones such as oxytocin, vasopressin and angiotensin III, and plays a role in maintaining homeostasis during pregnancy. May be involved in the inactivation of neuronal peptides in the brain. Cleaves Met-enkephalin and dynorphin. Binds angiotensin IV and may be the angiotensin IV receptor in the brain. Three alternatively spliced isoforms have been described.

Protein type: Membrane protein, integral; EC 3.4.11.3; Protease

Chromosomal Location of Human Ortholog: 5q15

Cellular Component: cytoplasmic vesicle membrane; membrane; lysosomal membrane; perinuclear region of cytoplasm; integral to plasma membrane; plasma membrane; extracellular region; intracellular; cytosol

Molecular Function: zinc ion binding; metallopeptidase activity; aminopeptidase activity

Biological Process: antigen processing and presentation of peptide antigen via MHC class I; protein polyubiquitination; cell-cell signaling; antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-independent; antigen processing and presentation of exogenous peptide antigen via MHC class I; protein catabolic process; female pregnancy; proteolysis