What does glutathione S transferase do?
Glutathione S-transferases (GSTs) are a family of Phase II detoxification enzymes that function to protect cellular macromolecules from attack by reactive electrophiles. Specifically, GSTs catalyse the conjugation of glutathione (GSH) to a wide variety of endogenous and exogenous electrophilic compounds (Figure 1).
How is glutathione S transferase activity calculated?
The GST activity is determined by measuring the rate of produced conjugation between reduced glutathione and CDNB, which is proportional to the increase in absorbance at 340nm over time (ΔOD340nm/min).
Where is glutathione S transferase found?
cytosol
The glutathione transferases (GSTs; also known as glutathione S-transferases) are major phase II detoxification enzymes found mainly in the cytosol. In addition to their role in catalysing the conjugation of electrophilic substrates to glutathione (GSH), these enzymes also carry out a range of other functions.
What is GST activity?
Glutathione-S-transferases (GSTs) are a group of enzymes that are important in the detoxication of many different xenobiotics in mammals. GST activity was found to be present in plants,1 insects,2 yeast,3 bacteria,4 and in most mammalian tissues, especially in the liver, which plays a key role in detoxification.
Is glutathione S transferase a protein?
The glutathione S-transferases (GSTs) are an abundant family of dimeric proteins that have the capacity to conjugate glutathione (GSH) with a variety of compounds containing electrophilic centers.
What is the function of GST in mammalian cells?
GST is a multifunctional enzyme, involved in detoxification processes. This role is achieved by catalytic conjugation of glutathione with a large number of electrophilic toxins and carcinogens. In mammals, GST is found in all tissues and organs.
What is the difference between reduced glutathione and glutathione?
The key difference between liposomal glutathione and reduced glutathione is that liposomal glutathione is an active form of glutathione that exists encapsulated inside a lipid molecule in order to enhance the absorption, while reduced glutathione is an active form of glutathione that does not undergo encapsulation.
What is glutathione Wikipedia?
Glutathione (GSH) is an antioxidant in plants, animals, fungi, and some bacteria and archaea. Glutathione is capable of preventing damage to important cellular components caused by reactive oxygen species such as free radicals, peroxides, lipid peroxides, and heavy metals.
What is the cofactor for glutathione reductase?
NADPH
Glutathione reductase (GR) catalyzes the reduction of oxidized glutathione (GSSG) to reduced glutathione (GSH) using NADPH as the reducing cofactor, and thereby maintains a constant GSH level in the system.
