A Revised Structure for the Glycolipid Terminus of Escherichia coli K5 Heparosan Capsular Polysaccharide.

A Revised Structure for the Glycolipid Terminus of Escherichia coli K5 Heparosan Capsular Polysaccharide.
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DOI:
10.3390/biom10111516
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发表时间:
2020-11-06
期刊:
影响因子:
5.5
通讯作者:
Linhardt RJ
Linhardt RJ
中科院分区:
生物学2区
文献类型:
--
作者:
Yan L;Fu L;Xia K;Chen S;Zhang F;Dordick JS;Linhardt RJ

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采用核磁共振(NMR)谱法和质谱法测定了肝磷脂多糖(CPS)的结构。先前在糖脂受体结构分配上的错误,从肝磷脂延伸而来,已被纠正。肝磷脂聚糖CPS的结构为GlcNAc α-1,[4GlcA β-1,4GlcNAc α-1,]n4GlcA β-1,[4Kdo β-2,7Kdo β-2,]0或14Kdo β-2,7Kdo β-2,4Kdo β-2,7Kdo β-2,4Kdo β-2,4Kdo β-2,4Kdo β-2,4Kdo β-1 (C16:0或C18:0)(其中,当CPS为100 kDa时n为~250)。
The structure of heparosan capsular polysaccharide (CPS) has been determined using enzymatic digestion with nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry. Previous errors in the assignment of the glycolipid acceptor structure, from which heparosan is extended, have been corrected. The structure of heparosan CPS is GlcNAc α-1,[4GlcA β-1,4GlcNAc α-1,]n4GlcA β-1,[4Kdo β-2,7Kdo β-2,]0 or 14Kdo β-2,7Kdo β-2,4Kdo β-2,7Kdo β-2,4Kdo β-2,7Kdo β-2,4Kdo β-PG-I (C16:0 or C18:0) (where n is ~250 for a CPS of 100 kDa).
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