Glycerate-3-phosphate

Interconversion of glycerate-3-phosphate and glycerate-2-phosphate, catalyzed by phosphoglyceromutase. The reaction closely resembles that catalyzed by 0 II c— cr 1 0 II c—cr 0 II c—cr 1... 

C-3 of glycerate-2-phosphate. The resulting phosphate bisphosphate phosphate... 

Glycerate-3-phosphate, glycerate-2-phosphate, and phos-phoenolpyruvate (PEP) make up another equilibrium group of metabolites that, like the hexose phosphates or the triose phosphates, function as a single metabolic pool (see fig. 12.13). 

The first interconversion between glycerate-3-phos-phate and glycerate-2-phosphate is similar to the reaction catalyzed by phosphoglucomutase (fig. 12.22). The enzyme is transiently phosphorylated in the course of the reaction. The second interconversion in the three-carbon pool is between glycerate-2-phosphate and phosphoenolpyruvate. This reaction is catalyzed by enolase and entails a dehydration (see fig. 12.13). 

The interconversions of the phosphorylated three-carbon acids—phosphenolpyruvate, glycerate-2-phosphate, and glycerate-3-phosphate—have already been discussed in this chapter. This pool is linked to the fructose-1,6-bisphos-... 

An intermediate in the interconversion of glycerate-3-phosphate to glycerate-2-phosphate is glycerate-2,3-bisphosphate. Where have we encountered this bisphosphate before ... 

Dehydration of 2-phosphoglycerate. Enolase catalyzes the dehydration of glycerate-2-phosphate to form PEP ... 

Glycerate-1,3-bisphosphate Glycerate-3 Phosphate Glycerate-2-phosphate... 

---