产品内容
本酶催化的反应为(1) 2 GDP-alpha-D-Mannose + [alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->2)-alpha-D-Man-(1->2)]N-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-GlcNAc-Diphospho-Ditrans,octacis-Undecaprenol = 2 GDP + alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-[alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->2)-alpha-D-Man-(1->2)]N-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-GlcNAc-Diphospho-Ditrans,octacis-Undecaprenol;;(2) 2 GDP-alpha-D-Mannose + alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-[alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->2)-alpha-D-Man-(1->2)]N-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-GlcNAc-Diphospho-Ditrans,octacis-Undecaprenol = 2 GDP + [alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->2)-alpha-D-Man-(1->2)]N+1-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-GlcNAc-Diphospho-Ditrans,octacis-Undecaprenol，系统名称为GDP-alpha-D-Mannose:alpha-D-Man-(1->2)-alpha-D-Man-(1->2)-[alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->2)-alpha-D-Man-(1->2)]N-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-Man-(1->3)-alpha-D-GlcNAc-Diphospho-Ditrans,octacis-Undecaprenol 2,3-alpha-Mannosyltransferase (Configuration-Retaining)，该酶参与大肠杆菌 O9a 血清型膜外叶中多甘露糖 O-多糖的生物合成。该酶由两个结构域组成，分别负责 1->2 和 1->3 连接。
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