Glycerol 3-Phosphatase (GPP) Activity Assay Kit, 50T/24S

Enzyme Function and Biological Significance: Glycerol 3-Phosphatase (GPP), also known as Glycerol-3-phosphate phosphatase, is a key metabolic enzyme that catalyzes the hydrolysis of glycerol 3-phosphate into glycerol. This reaction is critical for regulating cellular levels of glycerol 3-phosphate, a central intermediate in glucose metabolism, lipid metabolism, and energy metabolism. Beyond its primary role, GPP has been shown to exhibit additional phosphatase activities in vitro, including acting on 2-phosphoglycolate, tyrosine-proteins, and nucleotide phosphates such as ADP, ATP, GDP, and GTP—though the physiological relevance of these secondary activities remains under investigation.
Research Application Context: The activity of GPP directly influences glycerol production in cells, making it a vital target for studies in metabolic biology, particularly in fields like lipid metabolism research (e.g., investigating lipid imbalance-related conditions) and cellular physiology. Accurate quantification of GPP activity is essential for understanding normal cellular metabolic processes, as well as abnormal changes associated with cellular dysfunction. This kit is designed to support such research by providing a reliable method to measure GPP activity in various biological samples.
Assay Principle Foundation: The GPP Activity Assay Kit leverages the biochemical properties of the enzyme and downstream colorimetric reactions for detection. Specifically, GPP catalyzes the release of inorganic phosphate from glycerol 3-phosphate; the generated inorganic phosphate then reacts with ammonium molybdate under acidic conditions to form ammonium phosphomolybdate. After reduction, this complex converts to blue phosphomolybdate (phosphomolybdenum blue), which exhibits a characteristic absorption peak. By measuring the absorbance change of this blue product, researchers can indirectly determine the activity of GPP in the sample.