gamma-Glutamyl transpeptidase: catalytic, structural and functional aspects

Area of Science:

• Biochemistry
• Enzymology
• Mammalian Physiology

Background:

• Gamma-glutamyl transpeptidase (GGT) plays a key role in the metabolism of glutathione, a crucial cellular antioxidant.
• The enzyme catalyzes the transfer of gamma-glutamyl groups and the hydrolysis of glutathione, impacting amino acid and peptide homeostasis.

Purpose of the Study:

• To provide a comprehensive review of gamma-glutamyl transpeptidase (GGT).
• To detail the enzyme's tissue distribution, catalytic mechanisms, and structural characteristics.
• To highlight recent discoveries regarding the physiological functions of GGT.

Main Methods:

• Literature review of existing research on GGT.
• Analysis of studies on enzyme kinetics and inhibition.
• Examination of structural biology data and physiological investigations.

Main Results:

• GGT exhibits diverse tissue distribution and specific cellular localization in mammals.
• Detailed characterization of GGT's catalytic activities, including substrate specificity and inhibition patterns.
• Insights into GGT's structural features and their relation to function.
• Emerging evidence on the physiological significance of GGT in various biological processes.

Conclusions:

• Gamma-glutamyl transpeptidase is a multifunctional enzyme with significant roles in mammalian physiology.
• Understanding GGT's properties and functions is crucial for various fields, including medicine and biochemistry.
• Further research continues to uncover the complex involvement of GGT in health and disease.