(2R)-3-phosphoglycerate + ATP = (2R)-3-phospho-glyceroyl phosphate + ADP Carbohydrate degradation; glycolysis; pyruvate from D-glyceraldehyde 3-phosphate: step 2/5. Monomer. Expressed in roots, leaves and inflorescence. Accumulates in developing seeds 5 days after flowering (DAF). Repressed by glucose-hexokinase treatment (PubMed:16199612). Induced by heat stress (e.g. 37 degrees Celsius) (PubMed:17085506, PubMed:18055584). Accumulates in response to 3-oxo-octanoyl-homoserine lactone treatment (3OC8-HSL), a bacterial quorum-sensing signal (PubMed:22995300). Regulated by light (PubMed:24884362). Belongs to the phosphoglycerate kinase family.