Member of MYB3R- and R2R3- type MYB- encoding genes. Essential for plant innate immunity. Interacts with MOS4 and PRL1. The mRNA is cell-to-cell mobile.
Catalyzes the interconversion of 2-phosphoglycerate (2-PGA) and 3-phosphoglycerate (3-PGA) (PubMed:21813794). Required for guard cell function (e.g. blue light-, abscisic acid- (ABA), and low CO(2)-regulated stomatal movements) and fertility (e.g. pollen grains production) (PubMed:21813794).