Sequence determination of synthesized chondroitin sulfate dodecasaccharides

Glycobiology
Tatsumasa ShioiriNobuo Sugiura

Abstract

Chondroitin sulfate (CS) is a linear acidic polysaccharide composed of repeating disaccharide units of glucuronic acid and N-acetyl-d-galactosamine. The polysaccharide is modified with sulfate groups at different positions by a variety of sulfotransferases. CS chains exhibit various biological and pathological functions by interacting with cytokines and growth factors and regulating their signal transduction. The fine structure of the CS chain defines its specific biological roles. However, structural analysis of CS has been restricted to disaccharide analysis, hampering the understanding of the structure-function relationship of CS chains. Here, we chemo-enzymatically synthesized CS dodecasaccharides having various sulfate modifications using a bioreactor system of bacterial chondroitin polymerase mutants and various CS sulfotransferases. We developed a sequencing method for CS chains using the CS dodecasaccharides. The method consists of (i) labeling a reducing end with 2-aminopyridine (PA), (ii) partial digestion of CS with testicular hyaluronidase, followed by separation of PA-conjugated oligosaccharides with different chain lengths, (iii) limited digestion of these oligosaccharides with chondroitin lyase AC II into disacch...Continue Reading

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Citations

Jul 7, 2020·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Yuefan SongRobert J Linhardt
Mar 27, 2019·Analytical and Bioanalytical Chemistry·Kemal Solakyildirim
Jul 22, 2017·Angewandte Chemie·Jine LiJian Liu
Aug 28, 2020·Frontiers in Cellular Neuroscience·Rowan K HusseinHerbert M Geller
Jan 12, 2021·Frontiers in Cell and Developmental Biology·Wenshuang WangFuchuan Li

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