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  • Title: Isolation and characterization of receptor sialoglycoprotein for hemagglutinating virus of Japan (Sendai virus) from bovine erythrocyte membrane.
    Author: Suzuki Y, Suzuki T, Matsumoto M.
    Journal: J Biochem; 1983 Jun; 93(6):1621-33. PubMed ID: 6309760.
    Abstract:
    Sialoglycoprotein which exhibits inhibitory activity for hemagglutination by Hemagglutinating Virus of Japan (HVJ, Sendai virus) was isolated from the membrane of bovine erythrocytes. Purification steps for this sialoglycoprotein included extraction with lithium diiodosalicylate, phenol partition, precipitation with ethanol, and chromatography on a phosphocellulose column and an SDS-Sepharose CL-4B column. Purified sialoglycoprotein (GP-2) has high specific activity for inhibiting the hemagglutination with HVJ, and a lesser activity for that with Newcastle disease virus, but it does not inhibit the hemagglutination by influenza A virus. Inhibitory activity of GP-2 on hemagglutination by HVJ is 2,500-fold higher than that of fetuin. Liposomes containing a 10,000-fold larger amount of ganglioside mixture of bovine erythrocytes and those containing a 5,000-fold larger amount of each ganglioside of bovine erythrocytes, N-glycolylneuraminosyl-lactosyl ceramide, sialosyllacto-N-neotetraosyl- and sialosyl-lacto-N-norhexaosyl ceramide, had no inhibitory activity toward hemagglutination with HVJ. GP-2 (mol. wt. 250 K daltons) behaved homogeneously in SDS-polyacrylamide gel electrophoresis. It contained 70% carbohydrate and 30% protein, by weight. N-Acetylgalactosamine, N-acetylglucosamine, galactose, sialic acid (N-glycolylneuraminic acid, 96%; N-acetylneuraminic acid, 4%) were identified as carbohydrate components, in molar ratios of 1.0:4.0:5.2:2.9. All the oligosaccharides of GP-2 appeared to be linked to polypeptide chains by alkali-labile O-glycosidic linkages. Sialidase treatment of GP-2 and conversion of sialic acid residue of the glycoprotein to C8 and C7 analogues resulted in the loss of the inhibitory activity on hemagglutination by HVJ. Oligosaccharides isolated by gel filtration after treatment of GP-2 with alkaline borohydride had also lost the ability to inhibit the hemagglutination by HVJ. The above results indicate that isolated sialoglycoprotein is the endogenous receptor in bovine erythrocyte membrane specific to HVJ, and the hydroxy group linked to the 9-carbon atom of sialic acid and probably also the hydrophobic protein moiety are important for the recognition of HVJ attachment.
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