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聚阿拉伯半乳糖(Arabinogalactan,AG)是分枝杆菌细胞壁的主要组成成分,对于维持分枝杆菌细胞壁的完整具有重要意义。AG由衔接双糖、聚阿拉伯糖及聚半乳糖组成,连接方式各异、结构复杂。AG的合成是以UDP-GlcNAc、dTDP-Rha、UDP-Galf、多聚异戊二烯磷酸阿拉伯糖(DPA)为糖基供体,其中参与糖基供体形成及AG合成的酶是研发抗结核新药的作用靶点,而由此研发出的新药对治疗结核病具有高度专一性且对人类无毒性副作用。
Arabinogalactan (AG) is the main component of mycobacterial cell wall, which is of great significance for maintaining the integrity of mycobacterial cell wall. AG consists of linked disaccharide, poly-arabinose and polygalactose, with different connection modes and complicated structures. The synthesis of AG is based on UDP-GlcNAc, dTDP-Rha, UDP-Galf and polyisoprepyl phosphate arabinose (DPA) as glycosyl donors. Among them, enzymes involved in glycosyl donor formation and AG synthesis are R The target of new tuberculosis drugs, and thus developed a new drug for the treatment of tuberculosis is highly specific and non-toxic side effects to humans.