erythrina variegata/carbohydrate

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Defining the carbohydrate specificities of Erythrina corallodendron lectin (ECorL) as polyvalent Galbeta1-4GlcNAc (II) > monomeric II > monomeric Gal and GalNAc.

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BACKGROUND Erythrina corallodendron lectin (ECorL) is one of the potent applied lectins. In previous studies, the carbohydrate specificities of this lectin were limited to monosaccharides, simple oligosaccharides and several clusters. However, the polyvalent factor has not been

Redefinition of the carbohydrate specificity of Erythrina corallodendron lectin based on solid-phase binding assays and molecular modeling of native and recombinant forms obtained by site-directed mutagenesis.

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Binding of the N-acetyllactosamine-specific lectin from Erythrina corallodendron (ECorL) to four glycosphingolipids has been tested using the microtiter well assay. The role of several amino acids in the binding site region was studied by combining binding assays and molecular modeling for native

Purification and partial characterization of alpha-D-mannosidase from Erythrina indica seeds.

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Alpha-D-Mannosidase (EC: 3.2.1.24), a glycoprotein with 8.6% carbohydrate was purified (26 fold purification) to homogeneity from Erythrina indica seeds, by gel filtration on Bio-Gel P-100 and affinity chromatography on Con-A CL Seralose. The enzyme had the molecular mass of 124 kDa and 127 kDa by

Purification, some properties of a D-galactose-binding leaf lectin from Erythrina indica and further characterization of seed lectin.

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Lectin from a leaf of Erythrina indica was isolated by affinity chromatography on Lactamyl-Seralose 4B. Lectin gave a single band in polyacrylamide gel electrophoresis (PAGE). In SDS-gel electrophoresis under reducing and non-reducing conditions Erythrina indica leaf lectin (EiLL) split into two

Effect of glycosylation on the structure of Erythrina corallodendron lectin.

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The three-dimensional structure of the recombinant form of Erythrina corallodendron lectin, complexed with lactose, has been elucidated by X-ray crystallography at 2.55 A resolution. Comparison of this non-glycosylated structure with that of the native glycosylated lectin reveals that the tertiary

Expression of Erythrina corallodendron lectin in Escherichia coli.

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The cDNA of the Erythrina corallodendron lectin (ECorL) has been expressed in Escherichia coli. For this purpose, an NcoI site was inserted into the cDNA coding for the lectin precursor [Arango, R., Rozenblatt, S. & Sharon, N. (1990) FEBS Lett. 264, 109-112] immediately before the codon GTG

Structural requirements for the binding of oligosaccharides to immobilized lectin of Erythrina variegata (Linn) var. orientalis.

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The structural requirements for the interaction of asparagine-linked oligosaccharide moieties of glycoproteins with Erythrina variegata agglutinin (EVA) were investigated by means of affinity chromatography on an EVA-Sepharose column. Some of the branched poly-N-acetyllactosamine-type

Mutational studies of the amino acid residues in the combining site of Erythrina corallodendron lectin.

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High-resolution X-ray crystallography of the complex of the Gal/GalNAc-specific Erythrina corallodendron lectin with lactose identified the amino acid side chains that form contacts with the galactose moiety of the disaccharide. The contribution of these amino acids to the binding of different

Modification of the sugar specificity of a plant lectin: structural studies on a point mutant of Erythrina corallodendron lectin.

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A mutant of Erythrina corallodendron lectin was generated with the aim of enhancing its affinity for N-acetylgalactosamine. A tyrosine residue close to the binding site of the lectin was mutated to a glycine in order to facilitate stronger interactions between the acetamido group of the sugar and

Expression of Gal beta 1-4GlcNAc sequences by human gastrointestinal neoplasms and their precursors as detected by Erythrina cristagalli and Erythrina corallodendron lectins.

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Lectins from Erythrina cristagalli (EGA) and Erythrina corallodendron (ECorA) are well-known to detect type 2 chain oligosaccharides (Gal beta 1-4GlcNAc). These carbohydrate moieties are the biosynthetic precursors of various ABH and Lewis blood group antigens and are therefore also related to

Common architecture of the primary galactose binding sites of Erythrina corallodendron lectin and heat-labile enterotoxin from Escherichia coli in relation to the binding of branched neolactohexaosylceramide.

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The heat-labile enterotoxin from Escherichia coli (LT) is responsible for so-called traveller's diarrhea and is closely related to the cholera toxin (CT). Toxin binding to GM1 at the epithelial cell surface of the small intestine initiates the subsequent diarrheal disease. However, LT has a broader

Carbohydrate specificity and salt-bridge mediated conformational change in acidic winged bean agglutinin.

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Structures of two crystal forms of the dimeric acidic winged bean agglutinin (WBAII) complexed with methyl-alpha-D-galactose have been determined at 3.0 A and 3.3 A resolution. The subunit structure and dimerisation of the lectin are similar to those of the basic lectin from winged bean (WBAI) and

Carbohydrate specificity and quaternary association in basic winged bean lectin: X-ray analysis of the lectin at 2.5 A resolution.

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The structure of basic Winged Bean Agglutinin (WBAI) with two dimeric molecules complexed with methyl-alpha-D-galactopyranoside in the asymmetric unit, has been determined by the molecular replacement method and refined with 2.5 A X-ray intensity data. The polypeptide chain of each monomer has the

Studies on lectins. XLVII. Some properties of D-galactose binding lectins isolated from the seeds of Butea frondosa, Erythrina indica and Momordica charantia.

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The lectins from the seeds of Butea frondosa, Erythrina indica and Momordica charantia were isolated by affinity chromatography on O-alpha-D-galactosyl polyacrylamide gels. The Butea frondosa lectin has sedimentation coefficient S20,W = 6.7 S, its molecular weight is 141 000 and it consists of

Molecular dynamics simulations of oligosaccharides and their conformation in the crystal structure of lectin-carbohydrate complex: importance of the torsion angle psi for the orientation of alpha 1,6-arm.

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The conformation of the heptasaccharide Man-alpha 1,6-(Man-alpha 1,3)(Xyl-beta 1,2)-Man-beta 1,4-GlcNAc2-beta 1,4-(L- Fuc-alpha 1,3)-GlcNAc1, the carbohydrate moiety of Erythrina corallodendron lectin (EcorL), the hexasaccharide Man-alpha 1,6-(Man-alpha 1,3) (GlcNAc-beta 1,4)-Man-beta

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