Fucosylation of complex glycosphingolipids by recombinant fucosyltransferase-VII.

Fucosylation of complex glycosphingolipids by recombinant fucosyltransferase-VII.
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重组岩藻糖基转移酶-VII 对复杂鞘糖脂进行岩藻糖基化。

DOI:
10.1006/bbrc.1997.7254
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发表时间:
1997
影响因子:
3.1
通讯作者:
Holmes,EH
Holmes,EH
中科院分区:
生物学4区
文献类型:
--
作者:
Stroud,MR;Holmes,EH

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岩藻糖基转移酶VII(FucT-VII)是已知的5种α1→ 3岩藻糖基转移酶之一,能够将岩藻糖转移到乳糖胺聚糖中N-乙酰葡糖胺残基的C-3位。先前的研究表明,FucT-VII具有非常有限的特异性,仅能够岩藻糖基化末端α2→ 3唾液酸化的碳水化合物底物,导致唾液酸化刘易斯×(sLex)表位的合成。虽然FucT-VII在髓系来源的细胞中表达,但HL 60细胞的单唾液酸神经节苷脂部分仅含有内部和/或多重岩藻糖基化聚乳糖胺结构;未检测到单岩藻糖基化sLexderivatives。我们现在报告,通过FucT-VII对唾液酸去甲己糖基神经酰胺的作用形成的最终产物的结构这表明在HL 60细胞中发现的所有岩藻糖基化的单唾液酸化神经节苷脂的生物合成都是通过将糖脂(具有多个岩藻糖基化位点的鞘糖脂底物)延长至单岩藻糖基sLexand岩藻糖基化限制于末端GlcNAc-V来实现的。(包括E-选择素结合组分)涉及至少一个额外的α1→ 3岩藻糖基转移酶。
Fucosyltransferase VII (FucT-VII) is one of five known α1→3fucosyltransferases capable of transferring fucose to the C-3 position ofN-acetylglucosamine residues found in lactosamine based glycans. Previous studies have indicated that FucT-VII has a very restricted specificity, capable of fucosylating only terminally α2→3sialylated carbohydrate substrates, resulting in the synthesis of the sialyl Lewis × (sLex) epitope. Although FucT-VII is expressed in cells of myeloid origin, the monosialylganglioside fraction of HL60 cells contains only internally and/or multiply fucosylated polylactosamine structures; no monofucosylated sLexderivatives are detected. We now report that the structure of the final product formed by the action of FucT-VII on sialynorhexaosylceramide (a glycosphingolipid substrate having multiple fucosylation sites) is extended monofucosyl sLexand fucosylation is restricted to the terminal GlcNAc-V. This indicates that the biosynthesis of all fucosylated monosialylated gangliosides found in HL60 cells (including the E-selectin binding fractions) involves at least one additional α1→3fucosyltransferase.
DOI: --
发表时间: 1994-06
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由人α1→3岩藻糖基转移酶催化的岩藻糖转移至延长链新乳糖系列糖脂的GlcNAc残基的特异性:脂质环境对骨髓酶形式的影响。
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影响因子: 3.9
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影响因子: 6.8
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发表时间: 1996
期刊: Biochemistry
影响因子: 2.9
作者:
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