Glycoprotein Nature of Lipolytic Acyl Hydrolases in Potato Tubers and Leaves
The leaves and tubers of potatoes contain high levels of lipolytic acyl hydrolase activities (1, 2, 3). These enzymes are capable of hydrolyzing all endogenous phospholipids and galactolipids. It was recently reported that all of the lipolytic acyl hydrolase activity in potato tubers is associated with a glycoprotein fraction called “patatin” which comprises about 30% of the soluble protein in tubers (4). This study was undertaken in order to verify whether this finding was valid for other varieties of potatoes (in ref 4 Kennebec was the only variety studied). In addition, experiments were also conducted to determine whether the lipolytic enzymes in potato leaves were also associated with patatin or other glycoproteins.
KeywordsPotato Tuber DEAE Cellulose Hydrolase Activity Lipolytic Enzyme Phospholipase Activity
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- 3.R. A. Moreau, Regulation of phospholipase activity in potato leaves by protein phosphorylation-dephosphorylation, Plant Science (in press).Google Scholar