CD13: Broad specificity aminopeptidase. Plays a role in the final digestion of peptides generated from hydrolysis of proteins by gastric and pancreatic proteases. May play a critical role in the pathogenesis of cholesterol gallstone disease. May be involved in the metabolism of regulatory peptides of diverse cell types including small intestinal and tubular epithelial cells, macrophages, granulocytes and synaptic membranes from the CNS. Found to cleave antigen peptides bound to major histocompatibility complex class II molecules of presenting cells and to degrade neurotransmitters at synaptic junctions. Is also implicated as a regulator of IL-8 bioavailability in the endometrium, and therefore may contribute to the regulation of angiogenesis. Is used as a marker for acute myeloid leukemia and plays a role in tumor invasion. In case of human coronavirus 229E (HCoV-229E) infection, serves as receptor for HCoV-229E spike glycoprotein. Mediates as well human cytomegalovirus (HCMV) infection. Belongs to the peptidase M1 family.
Protein type: EC 3.4.11.2; Membrane protein, integral; Other Amino Acids Metabolism - glutathione; Protease; Receptor, misc.
Chromosomal Location of Human Ortholog: 7|7 D2
Cellular Component: cytoplasm; endoplasmic reticulum-Golgi intermediate compartment; external side of plasma membrane; extracellular space; integral component of membrane; lysosomal membrane; membrane; nucleus; plasma membrane; vesicle membrane
Molecular Function: aminopeptidase activity; hydrolase activity; metal ion binding; metallopeptidase activity; peptidase activity; peptide binding; zinc ion binding
Biological Process: angiogenesis; cell differentiation; cell-cell signaling; cellular aromatic compound metabolic process; multicellular organism development; peptide catabolic process; proteolysis; regulation of blood pressure; signal transduction
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