REGULATORY ENZYMES OF GLYCOLYSIS PATHWAY AND RELATED DEFICIENCIES

Abstract

The tricarboxylic acid (TCA) cycle, which is in control of change glucose into utilized energy, is hindered by hypoxia, or low oxygen levels. As a result, glycolysis becomes the primary metabolic pathway in these conditions. Typically, glycolysis enzymes are dispersed throughout the cytoplasm. However, recent studies have uncovered a fascinating phenomenon: when exposed to hypoxic stress, yeast and Caenorhabditis elegans neurons form glycolytic bodies, which are biomolecular condensates that separate from the surrounding environment. These condensates, known as G bodies, enhance glucose utilization and may function as specialized compartments, or "metabolons," to increase energy production. Furthermore, glycolysis enzymes interact with each other and associate with cell membranes in various organisms and tissues. Ongoing research is shedding light on the physiological significance of this compartmentalization. Absolutely! The activity of the glycolytic pathway is regulated by three major control points involving specific enzymes. These essential enzymes are: The first step in glycolysis is facilitated by hexokinase, which converts glucose into glucose 6-phosphate. The regulation of glycolysis heavily relies on phosphofructokinase (PFK), the most vital enzyme in this process. PFK plays a key role in catalyzing the formation of fructose-1,6-bisphosphate, a highly unstable sugar molecule containing two phosphate groups. Playing a crucial role in the last stage of the process, pyruvate kinase facilitates the conversion of phosphoenolpyruvate into pyruvate. Furthermore, the activity of PFK is influenced by ATP inhibition and AMP and fructose-2,6-bisphosphate (F2,6BP) activation, which contribute to the regulation of glycolysis and gluconeogenesis. These enzymes work together to ensure the production of energy is optimized and can adjust according to the specific requirements of the cell.