Abstract
CD22 (Siglec-2) is a B-cell surface inhibitory protein capable of selectively recognising sialylated glycans, thus dampening autoimmune responses against self-antigens. Here we have characterised the dynamic recognition of complex-type N-glycans by human CD22 by means of orthogonal approaches including NMR spectroscopy, computational methods and biophysical assays. We provide new molecular insights into the binding mode of sialoglycans in complex with h-CD22, highlighting the role of the sialic acid galactose moieties in the recognition process, elucidating the conformational behaviour of complex-type N-glycans bound to Siglec-2 and dissecting the formation of CD22 homo-oligomers on the B-cell surface. Our results could enable the development of additional therapeutics capable of modulating the activity of h-CD22 in autoimmune diseases and malignancies derived from B-cells.
| Original language | English |
|---|---|
| Pages (from-to) | 129-140 |
| Number of pages | 12 |
| Journal | ChemBioChem |
| Volume | 21 |
| Issue number | 1-2 |
| Early online date | 16 May 2019 |
| DOIs | |
| Publication status | Published - 15 Jan 2020 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Keywords
- molecular recognition
- N-glycans
- NMR spectroscopy
- sialic acids
- Siglecs
ASJC Scopus subject areas
- Biochemistry
- Molecular Medicine
- Molecular Biology
- Organic Chemistry
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