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A lectin from the Asian horseshoe crab Tachypleus tridentatus: purification, specificity and interaction with tumour cells. 1994

E Fischer, and N Q Khang, and G Letendre, and R Brossmer
Institut für Biochemie II, Universität Heidelberg, Germany.

A lectin from the haemolymph of the Asian horseshoe crab Tachypleus tridentatus was purified to homogeneity by affinity chromatography on Sepharose 4B-bound N-acetylneuraminic acid. The specificity of this lectin was studied by haemagglutination inhibition with sialic acid analogues, N-acetylhexosamines and glycoproteins. For the interaction with the agglutinin the N-acetyl group and the glyceryl side chain of N-acetylneuraminic acid are important, while presence of an aglycon, specially an alpha-glycosidically linked lactose increases affinity to the lectin. The strongest glycoprotein inhibitors were ovine as well as bovine submaxillary mucin and Collocalia mucin, all being O-chain glycoproteins but carrying completely different carbohydrate chains. The majority of N-chain proteins were inactive. As the lectin agglutinates human erythrocytes, but not the murine lymphoma lines Eb and ESb or the human colon carcinoma HT 29, these cancer cells apparently lack the 'Tachypleus tridentatus agglutinin-receptor' which is present on red cells and O-chain glycoproteins.

UI MeSH Term Description Entries
D007785 Lactose A disaccharide of GLUCOSE and GALACTOSE in human and cow milk. It is used in pharmacy for tablets, in medicine as a nutrient, and in industry. Anhydrous Lactose,Lactose, Anhydrous
D008811 Mice, Inbred DBA An inbred strain of mouse. Specific substrains are used in a variety of areas of BIOMEDICAL RESEARCH such as DBA/1J, which is used as a model for RHEUMATOID ARTHRITIS. Mice, DBA,Mouse, DBA,Mouse, Inbred DBA,DBA Mice,DBA Mice, Inbred,DBA Mouse,DBA Mouse, Inbred,Inbred DBA Mice,Inbred DBA Mouse
D009005 Monosaccharides Single chain carbohydrates that are the most basic units of CARBOHYDRATES. They are typically colorless crystalline substances with a sweet taste and have the same general formula CnH2nOn. Monosaccharide,Simple Sugar,Simple Sugars,Sugar, Simple,Sugars, Simple
D009439 Neuraminidase An enzyme that catalyzes the hydrolysis of alpha-2,3, alpha-2,6-, and alpha-2,8-glycosidic linkages (at a decreasing rate, respectively) of terminal sialic residues in oligosaccharides, glycoproteins, glycolipids, colominic acid, and synthetic substrate. (From Enzyme Nomenclature, 1992) Sialidase,Exo-alpha-Sialidase,N-Acylneuraminate Glycohydrolases,Oligosaccharide Sialidase,Exo alpha Sialidase,Glycohydrolases, N-Acylneuraminate,N Acylneuraminate Glycohydrolases,Sialidase, Oligosaccharide
D011975 Receptors, Mitogen Glycoprotein molecules on the surface of B- and T-lymphocytes, that react with molecules of antilymphocyte sera, lectins, and other agents which induce blast transformation of lymphocytes. Lectin Receptors,Mitogen Receptors,Receptors, Lectin,Mitogen Receptor,Receptor, Mitogen
D004912 Erythrocytes Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN. Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D006023 Glycoproteins Conjugated protein-carbohydrate compounds including MUCINS; mucoid, and AMYLOID glycoproteins. C-Glycosylated Proteins,Glycosylated Protein,Glycosylated Proteins,N-Glycosylated Proteins,O-Glycosylated Proteins,Glycoprotein,Neoglycoproteins,Protein, Glycosylated,Proteins, C-Glycosylated,Proteins, Glycosylated,Proteins, N-Glycosylated,Proteins, O-Glycosylated
D006385 Hemagglutination Inhibition Tests Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination. Hemagglutination Inhibition Test,Inhibition Test, Hemagglutination,Inhibition Tests, Hemagglutination,Test, Hemagglutination Inhibition,Tests, Hemagglutination Inhibition
D006458 Hemolymph The blood/lymphlike nutrient fluid of some invertebrates. Hemolymphs
D006737 Horseshoe Crabs An arthropod subclass (Xiphosura) comprising the North American (Limulus) and Asiatic (Tachypleus) genera of horseshoe crabs. Crabs, Horseshoe,Limulus,Limulus polyphemus,Tachypleus,Xiphosura,Crab, Horseshoe,Horseshoe Crab,Xiphosuras

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