Human NAALADase‑like 1/NAALADL1 Antibody

NAALADase-like1, also known as NAALADL1, (N-acetylated alpha -linked acidic dipeptidase like 1; also Ileal dipeptidylpeptidase) is a 100-115 kDa member of the peptidase M28 family of enzymes. It is found in the brush border of Ileal epithelium and demonstrates serine protease activity. Human NAALADL1 is a type II transmembrane glycoprotein that is 740 amino acids (aa) in length. It contains an extended extracellular domain (aa 29‑740) that shows a protease-associated region (aa 109‑335) with key catalytic residues at Ser617, Asp657 and His687. Multiple splice variants exist. Two show deletions of aa 161‑201 and 296‑330, respectively, while a third shows a 51 aa insertion after Pro359. Three show 18 to 42 aa substitutions after Pro502, with premature truncations after Ile522, Thr543 and Leu579. A final isoform shows a 17 aa substitution for aa 619‑740. Over aa 32‑740, human NAALADL1 shares 81% aa identity with mouse NAALADL1.