Phosphomutases are enzymes that facilitate the transfer of phosphate groups within a molecule. They play a crucial role in the metabolism of carbohydrates and nucleotides by converting one phosphate ester into another, which is essential for various biochemical processes. These enzymes are classified into two main types: phosphoglycerate mutase and nucleoside diphosphate mutase. Phosphomutases are important in regulating energy production and cellular signaling, making them vital for maintaining cellular function and overall metabolic health.