Chemoenzymatic synthesis of GD3 oligosaccharides and other disialyl glycans containing natural and non-natural sialic acids.
Chemoenzymatic synthesis of GD3 oligosaccharides and other disialyl glycans containing natural and non-natural sialic acids.
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GD3寡糖和其他含有天然和非天然唾液酸的混合物的化学酶合成。
DOI:
10.1021/ja907750r
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发表时间:
2009-12-30
影响因子:
15
通讯作者:
Chen, Xi
中科院分区:
文献类型:
--
作者:
Yu, Hai;Cheng, Jiansong;Ding, Li;Khedri, Zahra;Chen, Yi;Chin, Sharlene;Lau, Kam;Tiwari, Vinod Kumar;Chen, Xi
In order to understand the biological importance of naturally occurring sialic acid variations on disialyl structures in nature, we developed an efficient two-step multi-enzyme approach for the synthesis of a series of GD3 ganglioside oligosaccharides and other disialyl glycans containing a terminal Siaα2–8Sia component with different natural and non-natural sialic acids. In the first step, α2–3- or α2–6-linked monosialylated oligosaccharides were obtained using a one-pot three-enzyme approach. These compounds were then used as acceptors for the α2–8-sialyltransferase activity of a recombinant truncated multi-functional Campylobacter jejuni sialyltransferase CstII mutant, CstIIΔ32I53S, to produce disialyl oligosaccharides. The α2–8-sialyltransferase activity of CstIIΔ32I53S has promiscuous donor substrate specificity and can tolerate various substitutions at C-5 or C-9 of the sialic acid in CMP-sialic acid, while its acceptor substrate specificity is relatively restricted. The terminal sialic acid residues in the acceptable monosialylated oligosaccharide acceptors are restricted to Neu5Ac, Neu5Gc, KDN, and some of their C-9 modified forms but not their C-5 derivatives. The disialyl oligosaccharides obtained are valuable probes for their biological studies.
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影响因子:
2
作者:
Adachi, M;Tanaka, H;Takahashi, T
通讯作者:
Takahashi, T
影响因子:
2.1
作者:
ADLAM, C;KNIGHTS, JM;LINDON, JC
通讯作者:
LINDON, JC
影响因子:
3
作者:
Aalto, J;Pelkonen, S;Finne, J
通讯作者:
Finne, J
影响因子:
3.1
作者:
Blixt, O;Vasiliu, D;Wakarchuk, W
通讯作者:
Wakarchuk, W
影响因子:
4.8
作者:
Gilbert, M;Brisson, JR;Wakarchuk, WW
通讯作者:
Wakarchuk, WW