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GrainGenes Reference Report: PSL-84-137

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Reference	PSL-84-137
Title	Plant microsomal phospholipases exhibit preference for phosphatidylcholine with oxygenated acyl groups
Journal	Plant Science
Year	1992
Volume	84
Pages	137-144
Author	Banas A Johansson I Stymne S
Abstract	Microsomal preparations from developing rape (Brassica napus) embryos, young wheat (Triticum aestivum) roots and ripening avocado (Persea americana) mesocarp metabolized added sn-2-[14C]ricinoleoyl phosphatidylcholine (PC) and sn-2-[14C]linoleoyl- hydroperoxide-PC into [14C]fatty acids, [14C]diacylglycerols and [14C]phosphatidic acids at a higher rate than added sn-2-[14C]oleoyl PC and sn-2-[14C]linoleoyl-PC substrates, thereby demonstrating a specificity of plant microsomal phospholipases towards PC with oxygenated acyl groups The release of [14C]fatty acids was, in rape and wheat membranes, largely independent of addition of Ca2+ or EGTA whereas the production of [14C]diacylglycerols and [14C]phosphatidic acids was strongly inhibited by EGTA but this inhibition was relieved by excess of Ca2+. The relative preference of the different lipases for hydroxylated and peroxidated acyl groups differed widely between the different species.
Keyword	[ Hide all but 1 of 12 ] brassica napus enzyme activity lipid-metabolism mesocarp microsomes persea-americana phosphatidylcholines phospholipase-a2 phospholipase-c phospholipase-d phosphoric-diester-hydrolases triticum aestivum

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