产品内容
本酶催化的反应为GDP-beta-L-Colitose + beta-D-Galactopyranosyl-(1->3)-N-Acetyl-D-Glucosamine = GDP + alpha-L-Colitosyl-(1->2)-beta-D-Galactosyl-(1->3)-N-Acetyl-D-Glucosamine,系统名称为GDP-beta-L-Colitose:beta-D-Galactopyranosyl-(1->3)-N-Acetyl-D-Glucosamine L-Colitosyltransferase (Configuration-Inverting),该酶已从细菌大肠杆菌 Escherichia coli O55:H7 中得到表征,参与O-抗原的生物合成。该反应涉及异头构型翻转,不需要任何金属离子。该酶对受体高度专一,只识别乳酰-N-二糖,但可接受GDP-L-岩藻糖作为供体,活性与GDP-β-L-colitose几乎相同。