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Article
Isolation of a mannose-binding and IgE- and IgM-reactive lectin from the seeds of Artocarpus integer
Journal of Immunological Methods (1997)
  • Onn Haji Hashim, University of Malaya
Abstract
A mannose-binding lectin, termed champedak lectin-M, was isolated from an extract of the crude seeds of champedak (Artocarpus integer). On gel filtration chromatography, the lectin eluted in a single peak at elution volumes corresponding to 64 kDa, SDS-PAGE showed the mannose-binding lectin to be composed of 16.8 kDa polypeptides with some of the polypeptides being disulphide-linked to give dimers. When tested with all isotypes of immunoglobulins, champedak lectin-M demonstrated a selective strong interaction with human IgE and IgM, and a weak interaction with IgA2, The binding interactions of lectin-M were metal ion independent. The lectin was also shown to interact with horseradish peroxidase, ovalbumin, porcine thyroglobulin, human alpha(1)-acid glycoprotein, transferrin and alpha(1)-antitrypsin. It demonstrated a binding preference to Man alpha 1-3Man ligands in comparison to Man alpha 1-6Man or Man alpha 1-2Man. (C) 1997 Elsevier Science B.V.
Keywords
  • Lectin; IgE; IgM; Mannose; Artocarpus integer
Publication Date
1997
Citation Information
Onn Haji Hashim. "Isolation of a mannose-binding and IgE- and IgM-reactive lectin from the seeds of Artocarpus integer" Journal of Immunological Methods Vol. 209 Iss. 2 (1997)
Available at: http://works.bepress.com/onn_hajihashim/3/