Abstract
A new lipase from seeds of Pachira aquatica was purified to homogeneity by SDS-PAGE obtaining an enzyme with a molecular weight of approximately 55 kDa. The purified lipase exhibited maximum activity at 40°C and pH 8.0, for an incubation time of 90 min. Concerning temperature stability, at the range from 4 to 50°C, it retained approximately 47% of its original activity for 3 h. The enzyme activity increased in the presence of Ca++ and Mg++, but was inhibited by Hg++, Mn++, Zn++, Al+++ and various oxidizing and reducing agents. The lipase was highly stable in the presence of organic solvents, and its activity was stimulated by methanol. The values of K m and V max were 1.65 mM and 37.3 μmol mL−1 min−1, respectively, using p-nitrophenylacetate as substrate. The enzyme showed preference for esters of long-chain fatty acids, but demonstrated significant activity against a wide range of substrates.
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Polizelli, P.P., Facchini, F.D.A., Cabral, H. et al. A New Lipase Isolated from Oleaginous Seeds from Pachira aquatica (Bombacaceae). Appl Biochem Biotechnol 150, 233–242 (2008). https://doi.org/10.1007/s12010-008-8145-z
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DOI: https://doi.org/10.1007/s12010-008-8145-z