PMID: 9428661Jan 15, 1998Paper

Characterization and optimization of phospholipase A2 catalyzed synthesis of phosphatidylcholine

Biochimica Et Biophysica Acta
D EggerP Adlercreutz

Abstract

The phospholipase A2 (PLA2) catalyzed synthesis and hydrolysis of phosphatidylcholine (PC) was studied in a water activity controlled organic medium. The aim of the study was to find the conditions most favorable for the synthetic reaction. To do this, the impact of various parameters such as water activity, substrate concentration and temperature on enzyme activity and equilibrium yield was determined. The PC to lysophosphatidylcholine (LPC) ratio at equilibrium increases with decreasing water activity and increasing fatty acid concentration, as can be expected from the law of mass action of an esterification reaction. The enzyme activity on the other hand decreases under conditions that favor the esterification. The best yield in the synthetic reaction is 60% at a water activity of 0.11 and an oleic acid concentration of 1.8 M. That is to our knowledge the highest yield ever reported in this reaction. Both the hydrolysis and synthesis reaction follow Michaelis-Menten kinetics, the apparent Km values are the same for PC and LPC, namely 4.9 mM. Vmax is 82.5 and 10.4 nmol h(-1) mg(-1) for the hydrolysis and synthesis reaction, respectively. Studies on PLA2 at water activity controlled conditions resulted in a more complete under...Continue Reading

References

Oct 1, 1977·Proceedings of the National Academy of Sciences of the United States of America·C M GuptaH G Khorana
Apr 30, 1990·Biochemical and Biophysical Research Communications·P PernasG Bereziat
Aug 20, 1994·Biotechnology and Bioengineering·I SvenssonB Mattiasson

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Citations

Jul 5, 2003·Analytical Biochemistry·M JiménezM Pérez-Gilabert
Feb 5, 2000·Chemistry and Physics of Lipids·M PerssonP Adlercreutz
Feb 26, 2000·Enzyme and Microbial Technology·J SoB Kim
Mar 4, 1999·Journal of Applied Microbiology·A GubermanM Florin-Christensen
Oct 18, 2012·Biotechnology Progress·Angélica A OchoaEduardo J Vernon-Carter
Aug 26, 2014·Enzyme and Microbial Technology·Gabriele LuxRenate Ulbrich-Hofmann
Nov 11, 2006·Biotechnology and Bioengineering·Anna E V PeterssonBo Mattiasson
Mar 4, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Aleksandra LeśniarekWitold Gładkowski

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