Recombinant Human Leucyl-cystinyl aminopeptidase (LNPEP), Truncated

Uniprot Id

Q9UIQ6

Target Species

Human

Target Name

LNPEP

Target Full Name

Leucyl-cystinyl aminopeptidase

Target Function

Release of an N-terminal amino acid, cleaves before cysteine, leucine as well as other amino acids. 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.

Target Subcellular Location

Cell membrane; Single-pass type II membrane protein. Note=In brain only the membrane-bound form is found. The protein resides in intracellular vesicles together with GLUT4 and can then translocate to the cell surface in response to insulin and/or oxytocin. Localization may be determined by dileucine internalization motifs, and/or by interaction with tankyrases.; [Leucyl-cystinyl aminopeptidase, pregnancy serum form]: Secreted. Note=During pregnancy serum levels are low in the first trimester, rise progressively during the second and third trimester and decrease rapidly after parturition.

Target Protein Families

Peptidase M1 family

Target Tissue Specificity

Highly expressed in placenta, heart, kidney and small intestine. Detected at lower levels in neuronal cells in the brain, in skeletal muscle, spleen, liver, testes and colon.

Target Synonyms

angiotensin IV receptor; AT (4) receptor; CAP; Cystinyl aminopeptidase; insulin regulated aminopeptidase; insulin regulated membrane aminopeptidase; insulin responsive aminopeptidase; Insulin-regulated membrane aminopeptidase; Insulin-responsive aminopeptidase; IRAP; LCAP_HUMAN; Leucyl-cystinyl aminopeptidase; LNPEP; OTase; Oxytocinase; P-LAP; Placental leucine aminopeptidase; PLAP; pregnancy serum form; vasopressinase

Target Background

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.