Sequencing the Dermatan Sulfate Chain of Decorin.

Sequencing the Dermatan Sulfate Chain of Decorin.
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DOI:
10.1021/jacs.7b10164
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发表时间:
2017-11-22
影响因子:
15
通讯作者:
Linhardt RJ
Linhardt RJ
中科院分区:
化学1区
文献类型:
--
作者:
Yu Y;Duan J;Leach FE 3rd;Toida T;Higashi K;Zhang H;Zhang F;Amster IJ;Linhardt RJ

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Glycomics代表了经济学分析的最后前沿之一,也是最具挑战性的领域。糖基化发生在内质网和高尔基细胞器中,其控制既不是很好的理解,也不是基于蛋白质组或基因组分析的预测。蛋白质多聚糖(PG)及其糖胺多聚糖(GAG)侧链是结构最复杂的一类糖共轭化合物。此前,我们实验室解决了比库宁PG的硫酸软骨素链结构。目前的研究检查了更复杂的结构的皮肤素硫酸粘附素PG的Gag链。利用复杂的分离方法,然后结合组成分析、结构域映射和串联质谱分析,并结合改进的遗传算法进行分析,确定了核心蛋白皮肤素硫酸酯链的结构基序。这是具有突出结构基序的Gag的第二个例子,表明这类糖共轭化合物的结构可变性比预期的要简单一些。
Glycomics represents one of the last frontiers and most challenging in omic analysis. Glycosylation occurs in the endoplasmic reticulum and the Golgi organelle and its control is neither well-understood nor predictable based on proteomic or genomic analysis. One of the most structurally complex classes of glycoconjugates is the proteoglycans (PGs) and their glycosaminoglycan (GAG) side chains. Previously, our laboratory solved the structure of the chondroitin sulfate chain of the bikunin PG. The current study examines the much more complex structure of the dermatan sulfate GAG chain of decorin PG. By utilizing sophisticated separation methods followed by compositional analysis, domain mapping, and tandem mass spectrometry coupled with analysis by a modified genetic algorithm approach, the structural motif for the decorin dermatan sulfate chain was determined. This represents the second example of a GAG with a prominent structural motif, suggesting that the structural variability of this class of glycoconjugates is somewhat simpler than had been expected.
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