Enzymic reactions of fatty acid hydroperoxides in extracts of potato tuber. I. Comparison 9D- and 13L-hydroperoxy-octadecadienoic acids as substrates for the formation of a divinyl ether derivative.
1. 9-D-Hydroperoxy-octadeca-trans-10, cis-12-dienoic acid (formed from linoleic acid by potato lipoxygenase) is enzymically converted to a divinyl ether derivative (colneleic acid) by extracts of potato tuber. 2. the isomeric 13-L-hydroperoxide (formed from linoleic acid by soyabean lipoxygenase) is not a substrate for this enzyme system. 3. the enzyme reaction was not dependent on oxygen and was unaffected by metal chelators and thiol reagents. 4. studies with 18O-labelled substrate indicate that the ether oxygen atom in colneleic acid is not derived from the oxygens of the hydroperoxide group.
D004987:Ethers / Q000031:analogs & derivatives; D005231:Fatty Acids, Unsaturated / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D006880:Hydroxy Acids / Q000378:metabolism*; D007536:Isomerism; D007700:Kinetics; D008041:Linoleic Acids / Q000378:metabolism; D008084:Lipoxygenase; D010545:Peroxides / Q000378:metabolism*; D010944:Plants / Q000201:enzymology / Q000378:metabolism*
D004987:Ethers; D005231:Fatty Acids, Unsaturated; D006880:Hydroxy Acids; D008041:Linoleic Acids; D010545:Peroxides; D008084:Lipoxygenase