Trypsin-like serine protease

Trypsin-like serine proteases are a large family of enzymes characterized by a catalytic triad and a specific preference for cleaving peptide bonds following positively charged amino acids, such as Arginine (Arg) or Lysine (Lys), at the P1 position (Source: Hedstrom, 2002). This specificity is governed by a conserved Aspartate residue at the base of the S1 binding pocket, which forms an electrostatic interaction with the basic side chain of the substrate (Source: PubMed, PMID: 12452704). These enzymes play critical roles in diverse physiological processes, including blood coagulation, fibrinolysis, digestion, and the complement system (Source: StatPearls, Serine Proteases). Because of their central roles in these pathways, they are major therapeutic targets for anticoagulants, anti-inflammatory agents, and antiviral drugs (Source: Nature Reviews Drug Discovery, 2021). Dysregulation of these proteases is linked to conditions such as thrombosis, pancreatitis, and various cancers where they facilitate tissue remodeling and metastasis (Source: UniProt).

Other names

Serine endopeptidaseS1 family proteaseArginine-specific proteaseLysine-specific protease

Inhibition of the enzyme's catalytic activity by binding to the active site, specifically the S1 pocket, preventing the cleavage of peptide substrates with basic residues at the P1 position.