Abstract
To elucidate the mechanism underlying the hydrolysis of the GalNAcβ1→4Gal linkage in ganglioside GM2 [GalNAcβ1→4(NeuAcα2→3)Galβ1→4Glcβ1→1′ Cer] by β-hexosaminidase A (Hex A) with GM2 activator protein, we designed and synthesized two kinds of GM2 linkage analogues—6′-NeuAc-GM2 and α-GalNAc-GM2. In this paper, the efficient and systematic synthesis of these GM2 analogues was described. The highlight of our synthesis process is that the key intermediates, newly developed sialyllactose derivatives, were efficiently prepared in sufficient quantities; these derivatives directly served as highly reactive glycosyl acceptors and coupled with GalNTroc donors to furnish the assembly of GM2 tetrasaccharides in large quantities.
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Acknowledgements
This work was financially supported in part by MEXT of Japan (Grant-in-Aid for Scientific Research to H.I., no. 16580086 and M.K., no. 1701007) CREST of JST (Japan Science and Technology Agency) and National Institutes of Health Grant R01NS009626 (to Y.-T. L.). The authors are thankful to the referees for their valuable comments.
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Komori, T., Ando, T., Imamura, A. et al. Design and efficient synthesis of novel GM2 analogues with respect to the elucidation of the function of GM2 activator. Glycoconj J 25, 647–661 (2008). https://doi.org/10.1007/s10719-008-9117-9
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DOI: https://doi.org/10.1007/s10719-008-9117-9