Interconversion of 3- and 2-phosphoglycerate with 2,3-bisphosphoglycerate as the primer of the reaction. Can also catalyze the reaction of EC 220.127.116.11 (synthase) and EC 18.104.22.168 (phosphatase), but with a reduced activity.
In mammalian tissues there are two types of phosphoglycerate mutase isozymes: type-M in muscles and type-B in other tissues.
Belongs to the phosphoglycerate mutase family. BPG-dependent PGAM subfamily.