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Carbohydrate binding properties of the envelope glycoproteins of human immunodeficiency virus type 1

Here, we confirm and extend our previous findings on human immunodeficiency virus type 1 (HIV-1) envelope glycoproteinN-acetylglucosaminyl binding properties. We show the occurrence of saturable, temperature, pH, and calcium dependent carbohydrate-specific interactions between recombinant precursor gp160 (rgp160) and two affinity matrices:d-mannose-divinylsulfone-agarose, and natural glycoprotein, fetuin, also coupled to agarose. Binding of rgp160 to the matrices was inhibited by soluble mannosyl derivatives, α-d-Man₁₇-BSA and mannan, by β-d-GlcNAc₄₇-BSA and by glycopeptides from Pronase-treated porcine thyroglobulin, which produces oligomannose and complex N-linked glycans. Glycopeptides from Endoglycosidase H-treated thyroglobulin partially inhibited rgp160 binding, as did the asialo-agalacto-tetraantennary precursor oligosaccharide of human α₁-acid glycoprotein for binding to fetuin-agarose. β-d-Glucan and β-d-Gal₁₇-BSA had no or only limited effect. Also, surface unit rgp120 specifically interacted with fetuin-agarose and soluble fetuin, but in the latter case with a twofold reduced affinity relative to rgp160. After affinity chromatography, rgp160 was specifically retained by the two matrices and eluted by mannan in both cases, while rgp120 was not retained by fetuin-agarose but only eluted as a significantly retarded peak, which confirms its specific but weak interaction. Thus, rgp160 interacts with both oligomannose type, and the mannosyl core of complex type N-linked glycans, and its gp120 region plays a role in this interaction. Because fetuin and asialofetuin inhibit to nearly the same extent, the binding of rgp160 or rgp120 to fetuin-agarose, interaction with sialic acid or β-d-galactosyl structures of complex N- or O-linked glycans can be ruled out. Specific rgp160 and rgp120 binding to ap-aminophenyl-β-d-GlcNAc-agarose matrix, which was inhibited by β-d-GlcNAc₄₇-BSA and by fetuin, confirms that HIV-1 envelope glycoproteins can also specifically interact with theN-acetylglucosaminyl core of oligosaccharide structures.

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1. Laboratoire de Biologie Cellulaire, Faculté de Médecine Paris-Nord, 93012, Bobigny, France

   M. Haidar, N. Seddiki & L. Gattegno

2. CNRS URA 1463, CERVI, Hôpital de la Pitié-Salpêtrière, 75651, Paris Cedex 13, France

   J. C. Gluckman

1. M. Haidar
2. N. Seddiki
3. J. C. Gluckman
4. L. Gattegno

Haidar, M., Seddiki, N., Gluckman, J.C. et al. Carbohydrate binding properties of the envelope glycoproteins of human immunodeficiency virus type 1. Glycoconjugate J 9, 315–323 (1992). https://doi.org/10.1007/BF00731092

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• Received: 04 March 1992

• Revised: 04 August 1992

• Issue Date: December 1992

• DOI: https://doi.org/10.1007/BF00731092

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