Description
General description
Gamma-Glutamyltranspeptidase is a heterodimeric enzyme and belongs to the superfamily of N-terminal nucleophile hydrolases.
Application
Gamma-glutamyltranspeptidase from equine kidney has been used:
to identify the formation of 4-S-Cysteinyltetrodotoxin in the liver of Fugu pardalis
as a standard to determine the activity of gamma-glutamyltransferase from human B-cell lymphoma cell lysates
to hydrolyze isopeptides to study its effects on tubulin aggregation
Biochem/physiol Actions
Gamma-Glutamyltranspeptidase participates in glutathione metabolism and it catalyzes the cleavage of gamma-glutamyl compounds, such as glutathione. It also plays a role in the transfer of gamma-glutamyl moiety to amino acids and peptides.
Analysis Note
Crude
Other Notes
One unit will liberate 1.0 μmole of p-nitroaniline from L-γ-glutamyl-p-nitroanilide per min at pH 8.5 at 25°C.