Mannosyl/N-acetyl-beta-D-glucosaminyl binding properties of the envelope glycoprotein of human immunodeficiency virus type 2.
We have recently demonstrated that human immunodeficiency virus type 1 (HIV-1) recombinant envelope glycoprotein precursor gp160 (rgp160) behaves as a mannosyl/N-acetylglucosaminyl (GlcNAc) binding protein. If such a carbohydrate-binding property were of biological relevance it should be shared by other related primate immunodeficiency viruses such as HIV-2. The present study confirms this hypothesis and extends these findings by showing that HIV-2 recombinant gp140 (rgp140) specifically interacts with three affinity matrices substituted by synthetic or natural carbohydrate structures: D-mannose-divinylsulphone-agarose, para-aminophenyl-beta-D-GlcNAc-agarose and the natural glycoprotein, bovine fetuin, also coupled to agarose. Binding of rpg140 to the matrices was inhibited by alpha-D-Man17-BSA (where BSA is bovine serum albumin), beta-D-GlcNAc47-BSA and fetuin, and by glycopeptides derived from pronase-treated porcine thyroglobulin. Glycopeptides obtained after endoglycosidase H treatment of thyroglobulin had a limited inhibitory effect, whereas beta-D-Gal17-BSA and beta-D-glucan had no effect. These results indicate that, like HIV-1 envelope glycoprotein, HIV-2 rgp140 interacts with high-mannose and with the mannosyl core of complex-type N-linked glycans, as well as with the N-acetylglucosaminyl core of oligosaccharidic structures.
D000117:Acetylglucosamine / Q000378:metabolism; D000595:Amino Acid Sequence; D001665:Binding Sites; D050260:Carbohydrate Metabolism; D015686:Gene Products, env / Q000737:chemistry / Q000378:metabolism*; D015498:HIV-2 / Q000378:metabolism*; D066298:In Vitro Techniques; D008358:Mannose / Q000378:metabolism; D008969:Molecular Sequence Data; D011498:Protein Precursors / Q000737:chemistry / Q000378:metabolism*; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D000509:alpha-Fetoproteins / Q000378:metabolism; D054299:env Gene Products, Human Immunodeficiency Virus
D015686:Gene Products, env; D011498:Protein Precursors; D011994:Recombinant Proteins; D000509:alpha-Fetoproteins; D054299:env Gene Products, Human Immunodeficiency Virus; C066315:gp140 envelope protein, Human immunodeficiency virus 2; D008358:Mannose; D000117:Acetylglucosamine