3fosfoglyserlaattia

3-phosphoglycerate, also known as glycerate-3-phosphate or simply 3PG, is an intermediate in glycolysis. It is a three-carbon molecule that is phosphorylated at the third carbon atom. In the glycolytic pathway, 3-phosphoglycerate is formed from 2-phosphoglycerate and is then converted to 2-phosphoglycerate. This step is catalyzed by the enzyme phosphoglycerate mutase. The overall process of glycolysis involves the breakdown of glucose into pyruvate, and 3-phosphoglycerate plays a crucial role in this sequence of reactions.

Beyond glycolysis, 3-phosphoglycerate is also a key intermediate in the Calvin cycle, the light-independent reactions of photosynthesis. In this cycle, it is produced from ribulose-1,5-bisphosphate and carbon dioxide, and then further processed into glyceraldehyde-3-phosphate. This highlights its significance in both energy metabolism in animals and carbon fixation in plants. The molecule's structure consists of a glycerol backbone with a phosphate group attached to the third carbon and a carboxyl group at the first carbon. Its presence links central carbon metabolism pathways.