Acetone powder from dormant seeds of Ricinus communis L: Lipase activity and presence of toxic and allergenic compounds

Author： Cavalcanti Elisa   Maciel Fábio   Villeneuve Pierre   Lago Regina   Machado Olga   Freire Denise  

Publisher： Humana Press, Inc

ISSN： 0273-2289

Source： Applied Biochemistry and Biotechnology, Vol.137, Iss.1, 2007-12, pp. : 57-65

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Abstract

The influence of several factors on the hydrolytic activity of lipase, present in the acetone powder from dormant castor seeds (Ricinus communis) was evaluated. The enzyme showed a marked specificity for short-chain substrates. The best reaction conditions were an acid medium, Triton X-100 as the emulsifying agent and a temperature of 30°C. The lipase activity of the acetone powder of different castor oil genotypes showed great variability and storage stability of up to 90%. The toxicology analysis of the acetone powder from genotype Nordestina BRS 149 showed a higher ricin (toxic component) content, a lower 2S albumin (allergenic compound) content, and similar allergenic potential compared with untreated seeds.

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