title: Isolation and characterization of a French bean hemagglutinin with antitumor, antifungal, and anti-HIV-1 reverse transcriptase activities and an exceptionally high yield.
abstract: A dimeric 64-kDa hemagglutinin was isolated with a high yield from dried Phaseolus vulgaris cultivar "French bean number 35" seeds using a chromatographic protocol that involved Blue-Sepharose, Q-Sepharose, and Superdex 75. The yield was exceptionally high (1.1g hemagglutinin per 100g seed), which is around 10-85 times higher than other Phaseolus cultivars. Its N-terminal sequence resembled those of other Phaseolus hemagglutinins. The hemagglutinating activity of the hemagglutinin was stable in the pH range 6-8, and in the temperature range 0 degrees C-50 degrees C. It inhibited HIV-1 reverse transcriptase with an IC50 of 2microM. It suppressed mycelial growth in Valsa mali with an IC50 of 10microM. It inhibited proliferation of hepatoma HepG2 cells and breast cancer MCF-7 cells with an IC50 of 100 and 2microM, respectively. It had no antiproliferative effect on normal embryonic liver WRL68 cells.
authors.affiliation: Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China. b021770@mailserv.cuhk.edu.hk
authors.forename: S K
authors.initials: SK
authors.lastname: Lam
authors.forename: T B
authors.initials: TB
authors.lastname: Ng
mesh_terms: D000935:Antifungal Agents / Q000302:isolation & purification / Q000494:pharmacology*; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D001203:Ascomycota / Q000187:drug effects / Q000254:growth & development; D001943:Breast Neoplasms / Q000188:drug therapy; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D005260:Female; D054303:HIV Reverse Transcriptase / Q000037:antagonists & inhibitors*; D015497:HIV-1; D006388:Hemagglutinins / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D056945:Hep G2 Cells; D022781:Hepatocytes / Q000187:drug effects; D006801:Humans; D020128:Inhibitory Concentration 50; D008113:Liver Neoplasms / Q000188:drug therapy; D025282:Mycelium / Q000187:drug effects; D027805:Phaseolus / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D037121:Plant Lectins / Q000302:isolation & purification / Q000494:pharmacology* / Q000627:therapeutic use; D018894:Reverse Transcriptase Inhibitors / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D012639:Seeds; D012685:Sepharose / Q000031:analogs & derivatives
chemical_list: D000935:Antifungal Agents; D000972:Antineoplastic Agents, Phytogenic; D006388:Hemagglutinins; D010936:Plant Extracts; D037121:Plant Lectins; D018894:Reverse Transcriptase Inhibitors; C029483:Blue-Sepharose; D012685:Sepharose; C514824:reverse transcriptase, Human immunodeficiency virus 1; D054303:HIV Reverse Transcriptase