Parallel Glyco-SPOT Synthesis of Glycopeptide Libraries.

Parallel Glyco-SPOT Synthesis of Glycopeptide Libraries.
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DOI:
10.1016/j.chembiol.2020.06.007
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发表时间:
2020-09-17
影响因子:
8.6
通讯作者:
Cummings RD
Cummings RD
中科院分区:
生物学1区
文献类型:
--
作者:
Mehta AY;Veeraiah RKH;Dutta S;Goth CK;Hanes MS;Gao C;Stavenhagen K;Kardish R;Matsumoto Y;Heimburg-Molinaro J;Boyce M;Pohl NLB;Cummings RD

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Glycan recognition is typically studied using free glycans, but glycopeptide presentations represent more physiological conditions for glycoproteins. To facilitate studies of glycopeptide recognition, we developed Glyco-SPOT synthesis, which enables the parallel production of diverse glycopeptide libraries at microgram scales. The method employs a closed system for prolonged reactions required for coupling Fmoc-protected glycoamino acids, including O-, N-and S-linked glycosides, and release conditions to prevent side reactions. To optimize reaction conditions and sample reaction progress, we devised a biopsy testing method. We demonstrate the efficient utilization of such micro-scale glycopeptide libraries to determine the specificity of glycan-recognizing antibodies (e.g. CTD110.6) using microarrays, enzyme specificity on-array and in solution (e.g. ST6GalNAc1, GCNT1 and T-Synthase), and binding kinetics using fluorescence polarization. We demonstrated that the glycosylation on these peptides can be expanded using glycosyltransferases both in-solution and on-array. This technology will promote the discovery of biological functions of peptide modifications by glycans. Mehta et al. demonstrate a new method called Glyco-SPOT synthesis, to generate microgram quantities of glycopeptides with various O-, N- and S- linked glycoamino acids in parallel. The libraries produced are utilized for high-throughput microarray analysis, studying enzyme reactions, measuring binding affinities and as mass spectrometry standards.
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