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• W1507489898 abstract "A lectin in the fruiting bodies of Psathyrella velutina was purified by affinity chromatography on a chitin column and subsequent ion-exchange chromatography. P. velutina lectin (PVL) tends to aggregate irreversibly in buffered saline, but the addition of glycerol (10%, v/v) to lectin solutions was found to prevent aggregate formation. PVL is assumed to occur as a monomer of a polypeptide of Mr = 40,000 as determined by gel filtration and by gel electrophoresis in the presence of sodium dodecyl sulfate. PVL is specific for N-acetylglucosamine (GlcNAc). It was determined by equilibrium dialysis to have four binding sites/polypeptide molecule showing an average intrinsic association constant of K0 = 6.4 x 10(3) M-1 toward this sugar. The binding specificity of the lectin was studied by hemagglutination inhibition assays and by avidin-biotin-mediated enzyme immunoassays using various GlcNAc-containing saccharides. The results indicate that methyl N-acetyl beta-glucosaminide was a slightly better inhibitor than the corresponding alpha-anomer. PVL binds well to oligosaccharides bearing nonreducing terminal beta-GlcNAc linked 1----6 or 1----3 but poorly to those having a 1----4 linkage, such as N-acetylated chito-oligosaccharides. It also binds to the subterminal GlcNAc moiety when it is substituted at the C-6 position but does not interact with the moiety when substituted either at C-3 or C-4. Thus, these results show that PVL is quite different in its binding specificity from other GlcNAc-binding lectins of higher plants since they bind preferentially to beta-GlcNAc in 1----4 linkage and they have a high affinity for chitin oligosaccharides." @default.
• W1507489898 created "2016-06-24" @default.
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• W1507489898 date "1989-01-01" @default.
• W1507489898 modified "2023-10-06" @default.
• W1507489898 title "Purification and properties of an N-acetylglucosamine-specific lectin from Psathyrella velutina mushroom" @default.
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• W1507489898 doi "https://doi.org/10.1016/s0021-9258(17)31239-5" @default.
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