Abstract
Abstract: In brain, phosphatidylethanolamine can be synthesized from free ethanolamine either by a pathway involving the formation of CDP‐ethanolamine and its transfer to diglyceride, or by base‐exchange of ethanolamine with existing phospholipids. Although de novo synthesis from serine has also been demonstrated, the metabolic pathway involved is not known. The enzyme phosphatidylserine decarboxylase appears to be involved in the synthesis of much of the phosphatidylethanolamine in liver, but the significance of this route in brain has been challenged. Our in vitro studies demonstrate the existence of phosphatidylserine decarboxylase activity in rat brain and characterize some of its properties. This enzyme is localized in the mitochondrial fraction, whereas the enzymes involved in base‐exchange and the cytidine pathway are localized to microsomal membranes. Parallel in vivo studies showed that after the intracranial injection of L‐[G‐3H] serine, the specific activity of phosphatidylserine was greater in the microsomal fractions than in the mitochondrial fraction, whereas the opposite was true for phosphatidylethanolamine. When L‐[U‐14C]serine and [13H]ethanolamine were simultaneously injected, the 14C/3H ratio in mitochondrial phosphatidylethanolamine was 10 times that in microsomal phosphatidylethanolamine. The results demonstrate that serine is incorporated into the base moiety of phosphatidylethanolamine primarily through the decarboxylation of phosphatidylserine in brain mitochondria. A minimal value of 7% for the contribution of phosphatidylserine decarboxylase to whole‐brain phosphatidylethanolamine synthesis can be estimated from the in vivo data.
References
49
Referenced
42
10.1111/j.1471-4159.1966.tb04276.x
10.1007/978-1-4899-7321-4_13
{'key': 'e_1_2_1_4_1', 'first-page': '377', 'volume-title': 'Form and Function of Phospholipids', 'author': 'Ansell G. B.', 'year': '1973'}
/ Form and Function of Phospholipids by Ansell G. B. (1973)10.1016/S0021-9258(18)70226-3
/ J. Bioi. Chem / Phosphorus assay in column chromatog‐raphy by Bartlett G. R. (1959)10.1111/j.1471-4159.1976.tb12283.x
10.1083/jcb.89.3.579
{'key': 'e_1_2_1_8_1', 'first-page': '222', 'article-title': 'Identification and properties of methyltransferases that synthesize phosphatidylcholine in rat brain synaptosomes', 'volume': '13', 'author': 'Blusztajn J. K.', 'year': '1982', 'journal-title': 'Trans. Am. Soc. Neurochem'}
/ Trans. Am. Soc. Neurochem / Identification and properties of methyltransferases that synthesize phosphatidylcholine in rat brain synaptosomes by Blusztajn J. K. (1982){'key': 'e_1_2_1_9_1', 'first-page': '518', 'article-title': 'The choline cycle: Evidence for biosynthesis of choline from serine and methionine in rat brain', 'volume': '8', 'author': 'Blusztajn J. K.', 'year': '1982', 'journal-title': 'Soc. Neurosci. Abst'}
/ Soc. Neurosci. Abst / The choline cycle: Evidence for biosynthesis of choline from serine and methionine in rat brain by Blusztajn J. K. (1982)10.1016/0006-8993(79)90447-5
10.1016/0006-3002(60)90470-4
{'key': 'e_1_2_1_12_1', 'first-page': '156', 'article-title': 'Topographic localization of phospholipid synthesis on brain microsomes', 'volume': '12', 'author': 'Butler M.', 'year': '1981', 'journal-title': 'Trans. Am. Soc. Neurochem'}
/ Trans. Am. Soc. Neurochem / Topographic localization of phospholipid synthesis on brain microsomes by Butler M. (1981)10.1016/0005-2744(67)90223-9
10.1111/j.1471-4159.1980.tb11229.x
10.1016/S0022-2275(20)39421-9
10.1016/S0021-9258(19)42640-9
/ J. Biol. Chem / Purification and properties of phosphatidylserine decarboxylase from Escherichia coli by Dowhan W. (1974)10.1016/0005-2787(65)90025-0
10.1016/S0021-9258(18)64849-5
10.1111/j.1471-4159.1974.tb12212.x
10.1042/bj1600195
10.1016/S0022-2275(20)39503-1
/ J. Lipid Res / Resolution of intact phosphatidylinositols by argentation thin‐layer chromatography by Holub B. J. (1971)10.1007/978-1-4615-7748-5_9
10.1007/978-1-4684-0955-0_5
10.1016/S0022-2275(20)39380-9
/ J. Lipid Res / Base exchange reactions of the phospholipids in rat brain particles by Kanfer J. N. (1972)10.1016/S0021-9258(18)91247-0
/ J. Biol. Chem / Metabolism and function of bacterial lipids by Kanfer J. (1964)10.1016/S0021-9258(19)50785-2
10.1007/BF00964414
10.1016/S0021-9258(19)52451-6
10.1016/S0021-9258(17)40228-6
/ J. Biol. Chem / Metabolism of glycerophospholipids in myelin and microsomes in rat brain by Miller S. L. (1977){'key': 'e_1_2_1_30_1', 'first-page': '1', 'volume-title': 'Phospholipids in the Nervous System', 'author': 'Mozzi R.', 'year': '1982'}
/ Phospholipids in the Nervous System by Mozzi R. (1982)10.1007/BF02531385
10.1111/j.1471-4159.1971.tb00004.x
10.1111/j.1471-4159.1979.tb04573.x
10.1016/0005-2760(81)90034-5
10.1016/S0022-2275(20)41714-6
/ J. Lipid Res / Enzymic synthesis of ether types of choline and ethanolamine phosphoglycerides by microsomal fractions from rat brain and liver by Radominska‐Pyrek A. (1977)10.1016/S0021-9258(19)68751-X
/ J. Biol. Chem / Evidence for distinct subcellular sites of opiate receptors. Demonstration of opiate receptors in smooth microsomal fractions isolated from rat brain by Roth B. L. (1981)10.1083/jcb.32.2.415
10.1016/0009-3084(70)90014-9
10.1515/bchm2.1968.349.2.1400
{'key': 'e_1_2_1_40_1', 'first-page': '173', 'volume-title': 'Phospholipids in the Nervous System', 'author': 'Toffano G.', 'year': '1982'}
/ Phospholipids in the Nervous System by Toffano G. (1982)10.1016/0005-2760(74)90168-4
10.1111/j.1471-4159.1972.tb01456.x
10.1016/S0021-9258(19)40807-7
/ J. Biol. Chem / Action of the highly purified, membrane‐bound enzyme phosphatidylserine decarboxylase Escherichia coli toward phosphatidylserine in mixed micelles and erythrocyte ghosts in the presence of surfactant by Warner T. G. (1975)10.1016/0006-8993(76)90225-0
10.1016/S0021-9258(18)67875-5
10.1016/S0021-9258(18)64504-1
/ J. Biol. Chem / Studies on the conversion in vitro of serine to ethanolamine by rat liver and brain by Wilson J. D. (1960)10.1016/0006-2952(63)90215-6
10.1016/S0021-9258(17)32826-0
/ J. Biol. Chem / Regulation of phospholipid metabolism in differentiating cells from rat brain cerebral hemispheres in culture by Yavin E. (1977)10.1139/o74-119
10.1007/BF02532893
Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 5, 2006, 10:01 a.m.) |
Deposited | 1 year, 10 months ago (Oct. 19, 2023, 9:18 p.m.) |
Indexed | 1 month, 2 weeks ago (July 11, 2025, 6:48 a.m.) |
Issued | 42 years, 3 months ago (May 1, 1983) |
Published | 42 years, 3 months ago (May 1, 1983) |
Published Online | 18 years, 10 months ago (Oct. 5, 2006) |
Published Print | 42 years, 3 months ago (May 1, 1983) |
@article{Butler_1983, title={The Role of Phosphatidylserine Decarboxylase in Brain Phospholipid Metabolism}, volume={41}, ISSN={1471-4159}, url={http://dx.doi.org/10.1111/j.1471-4159.1983.tb00844.x}, DOI={10.1111/j.1471-4159.1983.tb00844.x}, number={5}, journal={Journal of Neurochemistry}, publisher={Wiley}, author={Butler, Madeline and Morell, Pierre}, year={1983}, month=may, pages={1445–1454} }