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  • Title: Lipoxygenase-1 from soybean seed inhibiting the activity of pancreatic lipase.
    Author: Satouchi K, Hirano K, Fujino O, Ikoma M, Tanaka T, Kitamura K.
    Journal: Biosci Biotechnol Biochem; 1998 Aug; 62(8):1498-503. PubMed ID: 9757555.
    Abstract:
    There are some similar characteristics in protein nature between the lipase inhibitor from soybean seed and soybean lipoxygenase-1 (LOX-1). Thus, the inhibiting protein for pancreatic lipase was prepared from defatted soybean meal by the procedure for the isolation of LOX-1 [Axelrod et al., Methods in Enzymology, 71, 441-451 (1981)]. The LOX-1 from soybean seed dose-dependently inhibited the release of fatty acid from a soybean oil emulsion, and the concentration of LOX-1 to cause half inhibition of the lipase activity was 3.2 x 10(-7) M. The LOX-1 obtained from E. coli transfected with a plasmid carrying the soybean LOX-1 gene also inhibited the lipase activity. However, the lipase-inhibiting activity by the LOX-1 was not affected by the presence of nordihydroguaiaretic acid, an inhibitor for LOX, in the reaction mixture. These results show that the soybean LOX-1 inhibits lipase activity regardless of its lipoxygenase activity.
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