- Revealing Functional Significance of Interleukin-2 Glycoproteoforms Enabled by Expressed Serine Ligation
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Naturally occurring interleukin-2 (IL-2) is a pleiotropic glycoprotein that regulates immune responses by controlling the differentiation and homeostasis of T cells. Non-glycosylated IL-2 has been used in clinical settings for three decades. However, the function of the O-glycan of native IL-2 remains elusive. Herein, to stress this issue, we report a highly efficient semi-synthesis of homogeneous glycosylated IL-2 with various glycoproteoforms on a multi-milligram scale. The glycopeptide fragment was prepared by chemical synthesis and then merged with recombinant fragment via a serine ligation to generate the desired glycoprotein in a single operation. Biological evaluation of the homogenous glycoprotein library reveals that the activity of IL-2 in activating individual T cell subset is glycan dependent, thus highlighting the possibility of further improving current clinical medicine.
- Cao, Qi,Li, Bin,Liu, Jiazhi,Liu, Lizhen,Liu, Xinnan,Shao, Hong,Tao, Houchao,Wang, Can,Wang, Ping,Xue, Dongxiang,Ye, Farong,Yu, Biao,Zhao, Hongbo,Zhao, Jie
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- Stereoselective synthesis of sialylated tumor-associated glycosylamino acids
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Suitably protected sialyl TN and 2,6-sialyl T tumor-associated carbohydrate antigen-derived amino acids have been prepared stereoselectively using an oxazolidinone-derived sialoside donor. These glycosylamino acids can be employed directly in t
- Corcilius, Leo,Payne, Richard J.
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p. 5794 - 5797
(2013/12/04)
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- Synthesis of glycopeptide sequences of repeating units of the mucins MUC 2 and MUC 3 containing oligosaccharide side-chains with core 1, core 2, core 3, core 4 and core 6 structure
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An efficient synthesis of glycosylamino acid building blocks containing core 1, core 2, core 3, core 4 or core 6 mucin core oligosaccharide structures linked O-glycosidically to threonine has been developed. These building blocks 6, 10, 16, 24 and 30 can be used directly for coupling reactions in a glycopeptide synthesis. In a multiple-column solid-phase synthesis, they have been used to prepare different series of glycopeptides. Decapeptide sequences have been synthesized from repeating units of the mucins MUC 2 and MUC 3 in which different threonine residues are each systematically glycosylated with an oligosaccharide of core 1, core 2, core 3, core 4 or core 6 structure. Glycopeptides are substrates for the study of the biosynthesis of the saccharide side-chains of mucins.
- Mathieux, Nathalie,Paulsen, Hans,Meldal, Morten,Bock, Klaus
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p. 2359 - 2368
(2007/10/03)
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