Recombinant Human PGPEP1 protein (His tag N-Terminus)

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PGPEP1 also known as pyroglutamyl-peptidase I is an enzyme responsible for the removal of pyroglutamyl (pGlu) groups from the N-terminus of peptides and proteins an important step for protein regulation and maturation. The enzyme typically shows broad substrate specificity. PGPEP1 has an approximate mass of 23 kDa and is expressed in various tissues although its expression levels differ depending on the tissue type. Researchers often examine its expression in the liver and kidney where it is significantly active.

Biological function summary

The removal of the pGlu group by PGPEP1 modifies peptide stability and activity impacting processes like metabolism and signal transduction. PGPEP1 operates as a monomer and does not form part of larger protein complexes. By regulating the degradation of pyroglutamylated proteins it plays an important role in maintaining protein homeostasis within cells.

Pathways

PGPEP1 influences pathways such as protein catabolism and peptide hormone processing where the removal of pGlu groups aids in maintaining proteolytic activity and modulating bioactive peptides. Its activity intersects with hormones like thyrotropin-releasing hormone (TRH) which it processes. PGPEP1 also interacts with other enzymes like aminopeptidases involved in sequential processing of peptides after the initial pyroglutamyl removal.

Research indicates a connection between abnormal PGPEP1 activity and metabolic syndromes such as obesity due to its role in hormonal regulation and peptide processing. Studies also link PGPEP1 to cognitive disorders where it affects neuropeptide processing in neural tissues. Its interaction with hormones like TRH highlights a potential relationship with proteins such as thyroxine-binding globulin in managing these conditions.