DPP7 Inhibitors

Dipeptidyl peptidase 7, abbreviated as DPP7, belongs to a class of enzymes known as dipeptidyl peptidases (DPPs) that play crucial roles in the regulation of peptide metabolism and homeostasis within the human body. DPP7 is an exopeptidase, which means it cleaves dipeptides from the N-terminus of various peptide substrates. Structurally, DPP7 is a member of the S46 family of serine proteases and is characterized by the presence of a catalytic triad consisting of serine, aspartate, and histidine residues, which is essential for its enzymatic activity. DPP7 is primarily found in the cytoplasm of cells, with particularly high expression in immune cells such as lymphocytes and monocytes, as well as in the gastrointestinal tract and various other tissues. This enzyme is involved in the degradation and regulation of peptides, playing a critical role in the modulation of peptide signaling and immune responses. DPP7 specifically targets dipeptides with proline or alanine at the N-terminus, cleaving them to release free amino acids. By doing so, DPP7 helps maintain peptide homeostasis by inhibiting the accumulation of bioactive peptides that could influence cellular processes. Additionally, DPP7's activity can influence the bioavailability and activity of peptides involved in immune regulation, cell signaling, and other physiological processes. Its role in peptide metabolism highlights the importance of DPP7 in maintaining cellular and systemic balance, although further research is needed to fully elucidate its functions and regulatory mechanisms.