ECB-ART-41608
Bioorg Med Chem
2010 Jun 01;1811:3720-5. doi: 10.1016/j.bmc.2010.03.062.
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Synthesis and binding analysis of unique AG2 pentasaccharide to human Siglec-2 using NMR techniques.
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Siglec-2 is a mammalian sialic acid binding protein expressed on B-cell surfaces and is involved in the modulation of B-cell mediated immune response. We synthesized a unique starfish ganglioside, AG2 pentasaccharide Galfbeta(1-3)Galpalpha(1-4)Neu5Acalpha(2-3)Galpbeta(1-4)Glcp, and found that the synthetic pentasaccharide binds to human Siglec-2 by performing (1)H NMR experiments. Saturation transfer difference NMR experiments indicated that the C7-C9 side-chain and the acetamide moiety of the central sialic acid residue were located in the binding face of human Siglec-2. We determined the binding epitope of AG2 pentasaccharide to human Siglec-2, as the Galpalpha(1-4)Neu5Acalpha(2-3)Galp unit.
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Genes referenced: LOC115919910 LOC593824