Monitoring phosphatidic acid formation in intact phosphatidylcholine bilayers upon phospholipase D catalysis

Chunming Liu, Da Huang, Tinglu Yang, Paul S. Cremer

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have monitored the production of the negatively charged lipid, 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidic acid acid (POPA), in supported lipid bilayers via the enzymatic hydrolysis of 1-palmitoyl-2-oleoyl-sn-glycero- 3-phosphocholine (PC), a zwitterionic lipid. Experiments were performed with phospholipase D (PLD) in a Ca2+ dependent fashion. The strategy for doing this involved using membrane-bound streptavidin as a biomarker for the charge on the membrane. The focusing position of streptavidin in electrophoretic-electroosmotic focusing (EEF) experiments was monitored via a fluorescent tag on this protein. The negative charge increased during these experiments due to the formation of POPA lipids. This caused the focusing position of streptavidin to migrate toward the negatively charged electrode. With the use of a calibration curve, the amount of POPA generated during this assay could be read out from the intact membrane, an objective that has been otherwise difficult to achieve because of the lack of unique chromophores on PA lipids. On the basis of these results, other enzymatic reactions involving the change in membrane charge could also be monitored in a similar way. This would include phosphorylation, dephosphorylation, lipid biosynthesis, and additional phospholipase reactions.

Original languageEnglish (US)
Pages (from-to)1753-1759
Number of pages7
JournalAnalytical chemistry
Volume86
Issue number3
DOIs
StatePublished - Feb 4 2014

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Phospholipase D
Phosphatidic Acids
Phosphatidylcholines
Catalysis
Streptavidin
Lipids
Monitoring
Membranes
Acids
Phosphorylation
Lipid bilayers
Enzymatic hydrolysis
Phospholipases
Experiments
Biosynthesis
Biomarkers
Chromophores
Assays
Calibration
Electrodes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

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abstract = "We have monitored the production of the negatively charged lipid, 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidic acid acid (POPA), in supported lipid bilayers via the enzymatic hydrolysis of 1-palmitoyl-2-oleoyl-sn-glycero- 3-phosphocholine (PC), a zwitterionic lipid. Experiments were performed with phospholipase D (PLD) in a Ca2+ dependent fashion. The strategy for doing this involved using membrane-bound streptavidin as a biomarker for the charge on the membrane. The focusing position of streptavidin in electrophoretic-electroosmotic focusing (EEF) experiments was monitored via a fluorescent tag on this protein. The negative charge increased during these experiments due to the formation of POPA lipids. This caused the focusing position of streptavidin to migrate toward the negatively charged electrode. With the use of a calibration curve, the amount of POPA generated during this assay could be read out from the intact membrane, an objective that has been otherwise difficult to achieve because of the lack of unique chromophores on PA lipids. On the basis of these results, other enzymatic reactions involving the change in membrane charge could also be monitored in a similar way. This would include phosphorylation, dephosphorylation, lipid biosynthesis, and additional phospholipase reactions.",
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Monitoring phosphatidic acid formation in intact phosphatidylcholine bilayers upon phospholipase D catalysis. / Liu, Chunming; Huang, Da; Yang, Tinglu; Cremer, Paul S.

In: Analytical chemistry, Vol. 86, No. 3, 04.02.2014, p. 1753-1759.

Research output: Contribution to journalArticle

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