Cloning of E. coli K-12 orf8 (wbbI) and over-expression of the corresponding enzyme as a maltose-binding fusion protein provided recombinant WbbI β-1,6-galactofuranosyltransferase activity. Challenged with synthetic acceptor analogues in the presence of UDP-galactofuranose as a donor, WbbI showed a modest preference for pyranoside acceptor substrates of the α-D-gluco-configuration but it also possessed the ability to turn-over acceptor analogues.
克隆大肠杆菌K-12 orf8 (wbbI)并以
麦芽糖结合融合蛋白的形式过度表达相应的酶,提供了
重组WbbIδ-1,6-半
乳糖呋喃糖基转移酶的活性。在有
UDP-半
乳糖呋喃糖作为供体的情况下,用合成的受体类似物进行挑战,WbbI 对δ-
D-葡萄糖构型的
吡喃糖苷受体底物表现出适度的偏好,但它也具有翻转受体类似物的能力。