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Pyruvate kinase is the enzyme involved in the last step of glycolysis.It catalyzes the transfer of a phosphate group from phosphoenolpyruvate (PEP) to adenosine diphosphate (ADP), yielding one molecule of pyruvate and one molecule of ATP. [1]
Phosphoenolpyruvate (2-phosphoenolpyruvate, PEP) is the carboxylic acid derived from the enol of pyruvate and phosphate. It exists as an anion. PEP is an important intermediate in biochemistry. It has the highest-energy phosphate bond found (−61.9 kJ/mol) in organisms, and is involved in glycolysis and gluconeogenesis.
In enzymology, a pyruvate, water dikinase (EC 2.7.9.2) is an enzyme that catalyzes the chemical reaction. ATP + pyruvate + H 2 O AMP + phosphoenolpyruvate + phosphate. The 3 substrates of this enzyme are ATP, pyruvate, and H 2 O, whereas its 3 products are AMP, phosphoenolpyruvate, and phosphate.
The anhydride linkage in 1,3 bisphosphoglycerate is unstable and has a high energy. 1,3-bisphosphogylcerate kinase requires ADP to carry out its reaction yielding 3-phosphoglycerate and ATP. In the final step of glycolysis, pyruvate kinase transfers a phosphoryl group from phosphoenolpyruvate to ADP, generating ATP and pyruvate.
PEP (phosphoenol pyruvate) group translocation, also known as the phosphotransferase system or PTS, is a distinct method used by bacteria for sugar uptake where the source of energy is from phosphoenolpyruvate (PEP). It is known to be a multicomponent system that always involves enzymes of the plasma membrane and those in the cytoplasm.
3.9 Conversion of 2-phosphoglycerate to phosphoenolpyruvate. ... of enzymes called hexokinases to form ... from 1,3-bisphosphoglycerate to ADP by ...
Substrate-level phosphorylation exemplified with the conversion of ADP to ATP. Substrate-level phosphorylation is a metabolism reaction that results in the production of ATP or GTP supported by the energy released from another high-energy bond that leads to phosphorylation of ADP or GDP to ATP or GTP (note that the reaction catalyzed by creatine kinase is not considered as "substrate-level ...
Phosphoenolpyruvate carboxykinase (ATP) (EC 4.1.1.49, phosphopyruvate carboxylase (ATP), phosphoenolpyruvate carboxylase, phosphoenolpyruvate carboxykinase, phosphopyruvate carboxykinase (adenosine triphosphate), PEP carboxylase, PEP carboxykinase, PEPCK (ATP), PEPK, PEPCK, phosphoenolpyruvic carboxylase, phosphoenolpyruvic carboxykinase, phosphoenolpyruvate carboxylase (ATP), phosphopyruvate ...