sn-Glycerol-3-phosphate acyltransferase activity in particulate preparations from anaerobic, light-grown cells of Rhodopseudomonas spheroides. Involvement of acyl thiolester derivatives of acyl carrier protein in the synthesis of complex lipids. Lueking, D. R. & Goldfine, H. The Journal of Biological Chemistry, 250(21):8530–8535, November, 1975. abstract bibtex Crude particulate preparations obtained from anaerobic, light-grown cells of Rhodopseudomonas spheroides have been shown to possess a significant level of sn-glycerol-3-phosphate acyltransferase (EC 2.3.1.15) activity. In contrast to the enzyme from Escherichia coli, the R. spheroides glycerophosphate acyltransferase has a high specificity for acyl thiolester derivatives of acyl carrier protein (ACP) as acyl donors for the reaction. Only limited , nonlinear glycerophosphate incorporation into lipid occurs when acyl coenzyme A (CoA) derivatives are employed as acyl substrate. With oleyl-ACP as substrate, maximal enzyme activity was observed at 40 degrees, over a broad pH range (6.0 to 8.5) and did not require a divalent metal cation. The presence of dithiothreitol stimulated enzyme-activity 15 to 20%. When oleyl-ACP or palmityl-ACP was employed as sole acyl group donor, the major products recoverable from the reaction mixtures were lysophosphatidic acid, phosphatidic acid, and monoglyceride. Althouh oleyl-ACP and palmityl-ACP gave comparable maximal velocities in the initial acylation of glycerophosphate, the formation of phosphatidic acid occurred preferentially with the unsaturated acyl-ACP derivative.
@article{lueking_sn-glycerol-3-phosphate_1975,
title = {sn-{Glycerol}-3-phosphate acyltransferase activity in particulate preparations from anaerobic, light-grown cells of {Rhodopseudomonas} spheroides. {Involvement} of acyl thiolester derivatives of acyl carrier protein in the synthesis of complex lipids},
volume = {250},
issn = {0021-9258},
abstract = {Crude particulate preparations obtained from anaerobic, light-grown cells of Rhodopseudomonas spheroides have been shown to possess a significant level of sn-glycerol-3-phosphate acyltransferase (EC 2.3.1.15) activity. In contrast to the enzyme from Escherichia coli, the R. spheroides glycerophosphate acyltransferase has a high specificity for acyl thiolester derivatives of acyl carrier protein (ACP) as acyl donors for the reaction. Only limited , nonlinear glycerophosphate incorporation into lipid occurs when acyl coenzyme A (CoA) derivatives are employed as acyl substrate. With oleyl-ACP as substrate, maximal enzyme activity was observed at 40 degrees, over a broad pH range (6.0 to 8.5) and did not require a divalent metal cation. The presence of dithiothreitol stimulated enzyme-activity 15 to 20\%. When oleyl-ACP or palmityl-ACP was employed as sole acyl group donor, the major products recoverable from the reaction mixtures were lysophosphatidic acid, phosphatidic acid, and monoglyceride. Althouh oleyl-ACP and palmityl-ACP gave comparable maximal velocities in the initial acylation of glycerophosphate, the formation of phosphatidic acid occurred preferentially with the unsaturated acyl-ACP derivative.},
language = {eng},
number = {21},
journal = {The Journal of Biological Chemistry},
author = {Lueking, D. R. and Goldfine, H.},
month = nov,
year = {1975},
pmid = {387},
keywords = {Acyltransferases, Anaerobiosis, Bacteriochlorophylls, Glycerophosphates, Hydrogen-Ion Concentration, Kinetics, Light, Rhodobacter sphaeroides, Temperature},
pages = {8530--8535}
}
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In contrast to the enzyme from Escherichia coli, the R. spheroides glycerophosphate acyltransferase has a high specificity for acyl thiolester derivatives of acyl carrier protein (ACP) as acyl donors for the reaction. Only limited , nonlinear glycerophosphate incorporation into lipid occurs when acyl coenzyme A (CoA) derivatives are employed as acyl substrate. With oleyl-ACP as substrate, maximal enzyme activity was observed at 40 degrees, over a broad pH range (6.0 to 8.5) and did not require a divalent metal cation. The presence of dithiothreitol stimulated enzyme-activity 15 to 20%. When oleyl-ACP or palmityl-ACP was employed as sole acyl group donor, the major products recoverable from the reaction mixtures were lysophosphatidic acid, phosphatidic acid, and monoglyceride. 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In contrast to the enzyme from Escherichia coli, the R. spheroides glycerophosphate acyltransferase has a high specificity for acyl thiolester derivatives of acyl carrier protein (ACP) as acyl donors for the reaction. Only limited , nonlinear glycerophosphate incorporation into lipid occurs when acyl coenzyme A (CoA) derivatives are employed as acyl substrate. With oleyl-ACP as substrate, maximal enzyme activity was observed at 40 degrees, over a broad pH range (6.0 to 8.5) and did not require a divalent metal cation. The presence of dithiothreitol stimulated enzyme-activity 15 to 20\\%. When oleyl-ACP or palmityl-ACP was employed as sole acyl group donor, the major products recoverable from the reaction mixtures were lysophosphatidic acid, phosphatidic acid, and monoglyceride. 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