title: A homotetrameric agglutinin with antiproliferative and mitogenic activities from haricot beans.
abstract: A homotetrameric agglutinin with a molecular mass of 130 kDa was isolated from seeds of the haricot bean. The agglutinin was isolated using a procedure that involved ion exchange chromatography on DEAE-cellulose, affinity chromatography on Affi-gel blue gel and gel filtration by fast protein liquid chromatography on Superdex 200. Haricot bean agglutinin was adsorbed on DEAE-cellulose and Affi-gel blue gel. The hemagglutinating activity of the agglutinin was stable up to 40 degrees C. It underwent a 40% decline when the temperature was raised to 50 degrees C and a complete loss when the temperature was further increased to 80 degrees C. The hemagglutinating activity exhibited a time-dependent loss in activity when the agglutinin was incubated at 100 degrees C for different durations. No activity was discernible when the agglutinin was left at 100 degrees C for 1 min. The activity also underwent a decline in the presence of 500 mM FeCl(3) and CaCl(2). Haricot bean agglutinin manifested a weaker mitogenic activity than concanavalin A toward mouse splenocytes. It exhibited antiproliferative activity toward the tumor cell lines M1 [leukemia], HepG2 [hepatoma] and L1210 [leukemia] cells.
authors.affiliation: Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
authors.forename: Jack
authors.initials: J
authors.lastname: Ho Wong
authors.forename: T B
authors.initials: TB
authors.lastname: Ng
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D007887:Fabaceae / Q000737:chemistry* / Q000166:cytology; D006388:Hemagglutinins / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D051379:Mice; D008810:Mice, Inbred C57BL; D008934:Mitogens / Q000494:pharmacology*; D037121:Plant Lectins / Q000737:chemistry* / Q000494:pharmacology; D013154:Spleen / Q000166:cytology / Q000187:drug effects; D013696:Temperature
chemical_list: D006388:Hemagglutinins; D008934:Mitogens; D037121:Plant Lectins