UDP-glucose 4-epimerase
(重定向自UDP galactose epimerase)


![Intermediates and enzymes in the Leloir pathway of galactose metabolism.[1]](/uploads/202502/18/Leloir_pathway2441.png)
The enzyme UDP-glucose 4-epimerase (EC5.1.3.2), also known as UDP-galactose 4-epimerase or GALE, is a homodimeric epimerase found in bacterial, fungal, plant, and mammalian cells. This enzyme performs the final step in the Leloir pathway of galactose metabolism, catalyzing the reversible conversion of UDP-galactose to UDP-glucose. GALE tightly binds nicotinamide adenine dinucleotide (NAD+), a co-factor required for catalytic activity.