The enzyme, found in a number of methanogenic archaeal genera, is involved in the biosynthesis of cyclic 2,3-bisphosphoglycerate, a thermoprotectant. Activity is stimulated by potassium ions.
Biosynthesis of cyclic 2,3-diphosphoglycerate. Isolation and characterization of 2-phosphoglycerate kinase and cyclic 2,3-diphosphoglycerate synthetase from Methanothermus fervidus.