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The endoplasmic reticulum (ER) aminopeptidase 1 (ERAP1) is a 120 kDa protein localized to the lumen of the ER, which removes NH2-terminal residues from many antigenic precursors for MHC class I peptide presentation. Peptides that are presented by MHC class I on the surface of a cell must be 8-11 residues long, and ERAP1 specifically trims peptides of 9 amino acids or more. ERAP1 is also induced by interferon- gamma. The gene encoding human ERAP1 maps to chromosome 5q15. ERAP1 has previously been characterized as adipocyte-derived leucine aminopeptidase (A-LAP), puromycin-insensitive leucine-specific aminopeptidase (PILS-AP) and aminopeptidase regulator of TNFR1 shedding (ARTS-1). A-LAP is thought to inactivate several bioactive peptides, including angiotensin II and, subsequently, may be involved in the regulation of blood pressure. PILS-AP is described as playing a role in angiogenesis by regulating the proliferation and migration of endothelial cells, and ARTS-1 is characterized as a TNFR1 binding protein that promotes TNFR1 shedding. Further research will be necessary to fully elucidate the functions of this protein.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: A-LAP; Adipocyte-derived leucine aminopeptidase; Aminopeptidase PILS; aminopeptidase regulator of TNFR1 shedding; ARTS-1; CTD-2260A17.2; Endoplasmic reticulum aminopeptidase 1; endoplasmic reticulum aminopeptidase 1 delta-Exon-11 isoform; endoplasmic reticulum aminopeptidase 1 delta-Exon-13 isoform; endoplasmic reticulum aminopeptidase 1 delta-Exon-14 isoform; endoplasmic reticulum aminopeptidase 1 delta-Exon-15 isoform; endoplasmic reticulum aminopeptidase associated with antigen processing; ER-aminopeptidase 1; leucyl-specific aminopeptidase PILS; PILS-AP; Puromycin-insensitive leucyl-specific aminopeptidase; Type 1 tumor necrosis factor receptor shedding aminopeptidase regulator; VEGF-induced aminopeptidase
Gene Aliases: A-LAP; ALAP; APPILS; ARTS-1; ARTS1; ERAAP; ERAAP1; ERAP1; KIAA0525; PILS-AP; PILSA; PILSAP; UNQ584/PRO1154
UniProt ID: (Human) Q9NZ08, (Mouse) Q9EQH2
Entrez Gene ID: (Human) 51752, (Rat) 80897, (Mouse) 80898
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