Catalyzes a reversible epimerization of GDP-D-mannose that precedes the committed step in the biosynthesis of vitamin C (L-ascorbate), resulting in the hydrolysis of the highly energetic glycosyl-pyrophosphoryl linkage. Able to catalyze 2 distinct epimerization reactions and can release both GDP-L-galactose and GDP-L-gulose from GDP-mannose.

Belongs to the NAD(P)-dependent epimerase/dehydratase family.

378 amino acids

MGSSEKNGTAYGEYTYAELEREQYWPSEKLRISITGAGGFIGSHIARRLKSEGHYIIASDWKKNEHMTEDMFCHEFHLVDLRVMDNCLKVTNGVDHVFNLAADMGGMGFIQSNHSVIMYNNTMISFNMLEAARINGVKRFFYASSACIYPEFKQLETNVSLKESDAWPAEPQDAYGLEKLATEELCKHYTKDFGIECRVGRFHNIYGPFGTWKGGREKAPAAFCRKAQTSTDRFEMWGDGLQTRSFTFIDECVEGVLRLTKSDFREPVNIGSDEMVSMNEMAEIILSFEDRELPIHHIPGPEGVRGRNSDNTLIKEKLGWAPTMKLKDGLRFTYFWIKEQIEKEKTQGVDIAGYGSSKVVSTQAPVQLGSLRAADGKE

42.8 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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