Immunopurification and characterization of a rape (Brassica napus L.) seedling lipase

  • H Belguith
  • S Fattouch
  • T Jridi
  • Hamida J Ben


Lipase or triacylglycerol acylhydrolase (E.C. was purified to homogeneity from rapeseed-germinated cotyledons (Brassica napus L.). The purification scheme involved homogenization, centrifugation, ultracentrifugation and affinity chromatography using polyclonal antibodies raised against porcine pancreatic lipase. The purified rapeseed lipase was homogenous and did not contain contaminating proteins detectable by SDS-PAGE and HPLC analysis. The specific activity of the purified preparation was increased about 1950 times, with an overall yield of 35%. The rapeseed lipase was found to be a cytosoluble, glycosylated and heat-labile serine-hydrolase. It was monomeric with a molecular mass of 38 kDa and a pH of 6.6. The purification method used in the present work is rapid, simple, and yields highly purified lipase. It may therefore be applicable in the purification of other uncharacterized plant lipases.

Keywords: Brassica napus L., immuno-affinity, lipase, purification, triacylglycerol acyl hydrolase

African Journal of Biotechnology Vol. 12(21), pp. 3224-3234

Author Biographies

H Belguith
Department of Biology, Faculty of Science, Bizerte, Tunisia
S Fattouch
Biological Engineering Laboratory, INSAT, Tunis, Tunisia.
T Jridi
Department of Biology, Faculty of Science, Bizerte, Tunisia
Hamida J Ben
Department of Biology, Faculty of Science, Bizerte, Tunisia

Journal Identifiers

eISSN: 1684-5315