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• W2108438052 endingPage "669" @default.
• W2108438052 startingPage "659" @default.
• W2108438052 abstract "DC-SIGN (dendritic cell-specific ICAM-3 grabbing non-integrin) and Langerin are homologous C-type lectins expressed as cell-surface receptors on different populations of dendritic cells (DCs). DC-SIGN interacts with glycan structures on HIV-1, facilitating virus survival, transmission and infection, whereas Langerin, which is characteristic of Langerhans cells (LCs), promotes HIV-1 uptake and degradation. Here we describe a comprehensive comparison of the glycan specificities of both proteins by probing a synthetic carbohydrate microarray comprising 275 sugar compounds using the bacterially produced and fluorescence-labeled, monomeric carbohydrate-recognition domains (CRDs) of DC-SIGN and Langerin. In this side-by-side study DC-SIGN was found to preferentially bind internal mannose residues of high-mannose-type saccharides and the fucose-containing blood-type antigens H, A, B, Le(a), Le(b) Le(x), Le(y), sialyl-Le(a) as well as sulfatated derivatives of Le(a) and Le(x). In contrast, Langerin appeared to recognize a different spectrum of compounds, especially those containing terminal mannose, terminal N-acetylglucosamine and 6-sulfogalactose residues, but also the blood-type antigens H, A and B. Of the Lewis antigens, only Le(b), Le(y), sialyl-Le(a) and the sialyl-Le(x) derivative with 6'-sulfatation at the galactose (sialyl-6SGal Le(x)) were weakly bound by Langerin. Notably, Ca(2+)-independent glycan-binding activity of Langerin could not be detected either by probing the glycan array or by isothermal titration calorimetry of the CRD with mannose and mannobiose. The precise knowledge of carbohydrate specificity of DC-SIGN and Langerin receptors resulting from our study may aid the future design of microbicides that specifically affect the DC-SIGN/HIV-1 interaction while not compromising the protective function of Langerin." @default.
• W2108438052 created "2016-06-24" @default.
• W2108438052 creator A5025735412 @default.
• W2108438052 creator A5060151985 @default.
• W2108438052 date "2011-05-02" @default.
• W2108438052 modified "2023-10-18" @default.
• W2108438052 title "Comparative analysis reveals selective recognition of glycans by the dendritic cell receptors DC-SIGN and Langerin" @default.
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• W2108438052 doi "https://doi.org/10.1093/protein/gzr016" @default.
• W2108438052 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21540232" @default.
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