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A Toolkit to Enable Hydrocarbon Conversion in Aqueous Environments
Published on: October 2, 2012
Substrate specificity of O-alkylglycerol monooxygenase (E.C. 1.14.16.5), solubilized from rat liver microsomes
1Max-Planck-Institut für biophysikal, Chemie Am Fassberg, Goettingen, Federal Republic of Germany.
Abstract:
Synthetic alkyl lysophospholipids (ALP) show antineoplastic activity. In the present discussion, the cytotoxicity of ALP is attributed to their accumulation in tumor cells. Some neoplastic cell species, in contrast to normal cells, cannot metabolize ALP because of a lack of O-alkylglycerol monooxygenase (AGMO) activity. To understand the metabolic fate of ether lipids and ether-linked phospholipids, AGMO substrate specificity studies were undertaken. Thirty-five different natural and synthetic ether lipids and their metabolites (including a thioether) were tested as substrates for AGMO. The study revealed that the potent cytostatic substance, 1-O-octadecyl-2-O-methyl-rac-glycero-3-phosphocholine is not a substrate for AGMO. Therefore, its selective toxicity to tumor cells cannot be based on the differences in direct detoxification of 1-O-octadecyl-2-O-methyl-rac-glycero-3-phosphocholine by AGMO in normal and malignant cells. However, 1-O-octadecyl-2-O-methyl-rac-glycerol, which can be formed by phospholipase C hydrolysis, is a good substrate for AGMO.
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