Journal of Lipid Research, Vol 25, 1214-1221, Copyright © 1984 by Lipid Research, Inc.
Studies on the inhibition of pancreatic and microbial lipases by soybean proteins
Y Gargouri, R Julien, G Pieroni, R Verger and L Sarda
A protein, molecular weight 70,000 that inhibits pancreatic lipase has been
isolated from soybean seeds. Inhibition is not reversed by colipase unless
bile salts are added to the assay system. Inhibitory properties of the
purified protein are very similar to those of serum albumin or
alpha-lactoglobulin. It has been confirmed that, during intestinal
lipolysis of dietary fats, bile salts play an essential role for the
activation of the lipase-colipase system in the presence of inhibitory
proteins. The purified soybean lipase inhibitory protein was shown to be
highly surface-active and able to penetrate monomolecular films of various
glycerides and phospholipids at high surface pressure. Inhibition of
pancreatic lipase by proteins is related to their capacity to interact with
lipids and to modify the quality of the substrate-water interface. The
protein isolated from soybeans inhibits pancreatic and Rh. delemar lipase
in contrast to the Rh. arrhizus enzyme.