Summary: Mannosylglycerate synthase (EC 2.4.1.269) is an enzyme with system name GDP-mannose:D-glycerate 2-alpha-D-mannosyltransferase. This enzyme catalyses the following chemical reaction: GDP-mannose + D-glycerate ↔ GDP + 2-O-(alpha-D-mannopyranosyl) -D-glycerate. Depending on conditions mannosylglycerate synthase is more or less specific for the GDP-mannose and D-glycerate.