Protein
GDP-mannose 3,5-epimerase 1
Organism
Oryza sativa subsp. indica
Function
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 (By similarity).
Similarity
Belongs to the NAD(P)-dependent epimerase/dehydratase family.
Sequence
MGSSEKNGTAYGEYTYAELEREQYWPSEKLRISITGAGGFIGSHIARRLKSEGHYIIASDWKKNEHMTEDMFCHEFHLVDLRVMDNCLKVTNSVDHVFNLAADMGGMGFIQSNHSVIMYNNTMISFNMLEAARINGVKRFFYASSACIYPEFKQLETNVSLKESDAWPAEPQDAYGLEKLATEELCKHYTKDFGIECRVGRFHNIYGPFGTWKGGREKAPAAFCRKAQTSTDRFEMWGDGLQTRSFTFIDECVEGVLRLTKSDFREPVNIGSDEMVSMNEMAEIILSFEDRELPIHHIPGPEGVRGRNSDNTLIKEKLGWAPTMKLKDGLRFTYFWIKEQIEKEKTQGVDIAGYGSSKVVSTQAPVQLGSLRAADGKE