Poplar catkin: A natural biomaterial for highly specific and efficient enrichment of sialoglycopeptides

Poplar catkin: A natural biomaterial for highly specific and efficient enrichment of sialoglycopeptides
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杨花序:一种高度特异性、高效富集唾液酸糖肽的天然生物材料

DOI:
10.1016/j.cclet.2017.02.001
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发表时间:
2017-05
期刊:
Chinese Chemical Letter
影响因子:
--
通讯作者:
Zhi-Li Li
Zhi-Li Li
中科院分区:
其他
文献类型:
--
作者:
Xiao-Dong Wang;Yu-Jie Liu;Fen-Jie Li;Zhi-Li Li

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唾液酸作为与蛋白质和脂类相连的大分子糖链的末端实体,参与多种不同的病理生理过程。唾液酸糖共轭化合物的结构特征是理解它们的生物学功能所必需的。然而,唾液酸偶联物的全面唾液酸化分析仍然是一个挑战。在这项研究中,我们使用了一种天然的生物材料--白杨树的杨柳絮,开发了一种新型的捕获微尖,用于选择性和高效地富集唾液酸肽,而不会损失唾液酸残基和唾液糖肽中的水分子。扫描电子显微镜、傅里叶变换红外光谱分析以及Mäule和Wiesner染色分析表明,杨柳絮外层的主要成分是丁香基和愈创木基木素,它们在从复杂的多肽混合物中富集唾液酸肽起着关键作用。
Sialic acids as terminal entities of larger glycans linked to proteins and lipids are involved in multiple different pathological and physiological processes. Structural characterisation of sialoglycoconjugates is required to understand their biological function. However, a comprehensive sialylation analysis of sialoglycoconjugates has remained challenges. In this study, we employ a natural biomaterial, poplar catkin derived from white poplar tree (Populus tomentosaCarr.), to develop a novel capturing microtip for selective and efficient enrichment of sialoglycopeptides, without losses of sialic acid residues and water molecules from sialoglycopeptides. Scanning electron microscopy and Fourier-transform infrared spectroscopy analysis, along with Mäule and Wiesner staining assays, indicated that the main components on the outer layer of the poplar catkin are syringyl and guaiacyl lignins which play a key role in enriching sialoglycopeptides from complex peptide mixture.
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