Interaction of N-linked glycans, having multivalent GlcNAc termini, with GM3 ganglioside
Interaction of N-linked glycans, having multivalent GlcNAc termini, with GM3 ganglioside
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DOI：
10.1007/s10719-006-9001-4
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发表时间：
2006-11
影响因子：
3
通讯作者：
Seon-Joo Yoon;K. Nakayama;N. Takahashi;H. Yagi;N. Utkina;Helen Ying Wang;Koichi Kato;M. Sadílek;S. Hakomori
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文献类型：
--
作者：
Seon-Joo Yoon;K. Nakayama;N. Takahashi;H. Yagi;N. Utkina;Helen Ying Wang;Koichi Kato;M. Sadílek;S. Hakomori
GM3 ganglioside interacts specifically with complex-type N-linked glycans having multivalent GlcNAc termini, as shown for (1) and (2) below. (1) Oligosaccharides (OS) isolated from ConA-non-binding N-linked glycans of ovalbumin, whose structures were identified as penta-antennary complex-type with bisecting GlcNAc, having five or six GlcNAc termini (OS B1, B2), or bi-antennary complex-type having two GlcNAc termini (OS I). OS I is a structure not previously described. (2) Multi-antennary complex-type N-linked OS isolated from fetuin, treated by sialidase followed by β-galactosidase, having three or four GlcNAc termini exposed. These OS, conjugated to phosphatidylethanolamine (PE), showed clear interaction with3H-labeled liposomes containing GM3, when various doses of OS-PE conjugate were adhered by drying to multi-well polystyrene plates. Interaction was clearly observed only with liposomes containing GM3, but not LacCer, Gb4, or GalNAcα1-3Gb4 (Forssman antigen). GM3 interaction with PE conjugate of OS B1 or B2 was stronger than that with PE conjugate of OS I. GM3 interacted clearly with PE conjugate of N-linked OS from desialylated and degalactosylated fetuin, but not native fetuin. No binding was observed to cellobiose-PE conjugate, or to OS-PE conjugate lacking GlcNAc terminus. Thus, GM3, but not other GSL liposomes, interacts with various N-linked OS having multiple GlcNAc termini, in general. These findings suggest that the concept of carbohydrate-to-carbohydrate interaction can be extended to interaction of specific types of N-linked glycans with specific GSLs. Natural occurrence of such interaction to define cell biological phenomena is under investigation.
