GMP

GDP-甘露糖焦磷酸化酶(GMP)

在抗坏血酸代谢途径中, GMP 基因起着至关重要的作用。它编码 GDP - D - 甘露糖焦磷酸化酶，这是一种催化甘露糖 - 1 - 磷酸和 GTP 转化为 GDP - D - 甘露糖的酶。这种转化是抗坏血酸生物合成的关键步骤。GDP-D-甘露糖作为重要的中间体，通过一系列反应进一步转化为其他物质，最终导致抗坏血酸的合成。此外，GMP 基因的过表达可以提高抗坏血酸的含量，正向调节其积累。

GDP-mannosepyrophosphorylase,GMPase(GMP)

In the ascorbic acid metabolic pathway, the GMP gene plays a crucial role. It encodes GDP - D - mannose pyrophosphorylase, an enzyme that catalyzes the conversion of mannose - 1 - phosphate and GTP to GDP - D - mannose. This conversion is a key step in ascorbic acid biosynthesis. GDP - D - mannose serves as a vital intermediate, which is further transformed into other substances through a series of reactions, eventually leading to the synthesis of ascorbic acid. Moreover, the overexpression of the GMP gene can increase the content of ascorbic acid, positively regulating its accumulation.