Characterization of jacalin, the human IgA and IgD binding lectin from jackfruit.
The lectin jacalin from the jackfruit Artocarpus heterophyllus reacts by precipitation and western blotting with human IgA1 and IgD but not with IgA2 (nor IgG and IgM). However, it weakly binds IgA2 as shown by affinity chromatography and competitive ELISA. Predominantly reactive carbohydrates are D-galactose and N-acetyl D-galactosamine. Jacalin has an apparent Mr of about 54,000 and is probably made up of three non-glycosylated and one glycosylated non-covalently linked subunits. Its electrophoretic properties and amino acid and carbohydrate composition are indicated.
Aucouturier
P
P
Laboratory of Immunology and Immunopathology (CNRS UA 1172), Poitiers, France.
Mihaesco
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E
Mihaesco
C
C
Preud'homme
J L
JL
D000596:Amino Acids / Q000032:analysis; D002846:Chromatography, Affinity; D004587:Electrophoresis, Agar Gel; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007122:Immunoelectrophoresis; D007070:Immunoglobulin A / Q000276:immunology*; D007072:Immunoglobulin D / Q000276:immunology*; D037102:Lectins / Q000276:immunology*; D008970:Molecular Weight; D037121:Plant Lectins
D000596:Amino Acids; D007070:Immunoglobulin A; D007072:Immunoglobulin D; D037102:Lectins; D037121:Plant Lectins; C043696:jacalin