Abstract
A panel of O-acetylated N-glycolylneuraminic acid oligosaccharides has been prepared by diversification of common synthetic precursors by regioselective de- O-acetylation by coronaviral hemagglutinin-esterase (HE) combined with C7-to-C9 acetyl ester migration. The resulting compound library was printed on streptavidin-coated glass slides to give a microarray to investigate receptor binding specificities of viral envelope glycoproteins, including spike proteins and HEs from animal and human coronaviruses. It was found that the binding patterns of the viral proteins for N-glycolylated sialosides differ considerable from those of the previously synthesized N-acetylated counterparts. Generally, the spike proteins tolerate N-glycolyl modification, but selectivities differ among viruses targeting different hosts. On the other hand, the lectin domain of the corresponding HEs showed a substantial decrease or loss of binding of N-glycolylated sialosides. MD simulations indicate that glycolyl recognition by HE is mediated by polar residues in a loop region (109-119) that interacts with the 5- N-glycolyl moiety. Collectively, the results indicate that coronaviruses have adjusted their receptor fine specificities to adapt to the sialoglycome of their host species.
Original language | English |
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Pages (from-to) | 1041-1050 |
Number of pages | 10 |
Journal | ACS Infectious Diseases |
Volume | 8 |
Issue number | 5 |
Early online date | 13 Apr 2022 |
DOIs | |
Publication status | Published - 2022 |
Bibliographical note
Funding Information:The research was supported by TOP-PUNT grant 718.015.003 of The Netherlands Organization for Scientific Research (G.-J.B.); the Human Frontier Science Program Organization (HFSP) grant LT000747/2018-C (L.U.); ECHO Grant 711.011.006 of the Council for Chemical Sciences of The Netherlands Organization for Scientific Research (R.J.d.G.); and China Scholarship Council 2014-03250042 (Y.L.).
Publisher Copyright:
© 2022 American Chemical Society.
Keywords
- acetylated N-glycolylneuraminic acid oligosaccharides
- coronaviral glycoproteins
- receptor binding
- sialoglycomes
- spike proteins