Literature DB >> 10861220

The role of phosphatidylcholine in fatty acid exchange and desaturation in Brassica napus L. leaves.

J P Williams1, V Imperial, M U Khan, J N Hodson.   

Abstract

The role of phosphatidylcholine (PC) in fatty acid exchange and desaturation was examined and compared with that of monogalactosyldiacylglycerol (MGDG) in Brassica napus leaves using (14)C-labelling in vivo. Data are presented which indicate that in the chloroplast newly formed saturated (palmitic acid, 16:0) and monounsaturated (oleic acid, 18:1) fatty acid is incorporated into MGDG and desaturated in situ. In the non-plastidic compartments, however, newly formed fatty acid is exchanged with polyunsaturated fatty acid in PC, the probable major site of subsequent desaturation. The unsaturated fatty acid is released to the acyl-CoA pool, which is then used to synthesize diacylglycerol (DAG) containing a high level of unsaturated fatty acid. This highly unsaturated DAG may be the source for the biosynthesis of other cellular glycerolipids. The generally accepted pathway in which PC is synthesized from molecular species of DAG containing 16:0 and 18:1 followed by desaturation of the 18:1 to linoleic (18:2) and linolenic (18:3) acids is questioned.

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Year:  2000        PMID： 10861220      PMCID： PMC1221129          DOI： 10.1042/0264-6021:3490127

Source DB:  PubMed          Journal:  Biochem J        ISSN： 0264-6021            Impact factor:   3.857


  11 in total

1.  A re-examination in vivo of the phosphatidylcholine-galactolipid metabolic relationship during plant lipid biosynthesis.

Authors:  S Mongrand; J J Bessoule; C Cassagne
Journal:  Biochem J       Date:  1997-11-01       Impact factor: 3.857

2.  The removal of water and nonlipid contaminants from lipid extracts.

Authors:  J P Williams; P A Merrilees
Journal:  Lipids       Date:  1970-04       Impact factor: 1.880

3.  Synthesis of phosphatidylcholine in the chloroplast envelope after import of lysophosphatidylcholine from endoplasmic reticulum membranes.

Authors:  J J Bessoule; E Testet; C Cassagne
Journal:  Eur J Biochem       Date:  1995-03-01

4.  Low temperature-induced fatty acid desaturation in Brassica napus: thermal lability of the process.

Authors:  J P Williams; K Williams; M U Khan
Journal:  Biochim Biophys Acta       Date:  1992-04-08

5.  Effect of Growth Temperature on the Biosynthesis of Chloroplastic Galactosyldiacylglycerol Molecular Species in Brassica napus Leaves.

Authors:  G Johnson; J P Williams
Journal:  Plant Physiol       Date:  1989-11       Impact factor: 8.340

6.  Galactolipid Synthesis in Vicia faba Leaves: II. Formation and Desaturation of Long Chain Fatty Acids in Phosphatidylcholine, Phosphatidylglycerol, and the Galactolipids.

Authors:  J P Williams; G R Watson; S P Leung
Journal:  Plant Physiol       Date:  1976-02       Impact factor: 8.340

7.  Turnover of the glycerolipids of pumpkin leaves. The importence of phosphatidylcholine.

Authors:  P G Roughan
Journal:  Biochem J       Date:  1970-03       Impact factor: 3.857

8.  Metabolism of exogenous long-chain fatty acids by spinach leaves.

Authors:  P G Roughan; G A Thompson; S H Cho
Journal:  Arch Biochem Biophys       Date:  1987-12       Impact factor: 4.013

9.  The role of the acyl-CoA pool in the synthesis of polyunsaturated 18-carbon fatty acids and triacylglycerol production in the microsomes of developing safflower seeds.

Authors:  S Stymne; A K Stobart; G Glad
Journal:  Biochim Biophys Acta       Date:  1983-07-12

10.  Labelling studies in vivo on the metabolism of the acyl and glycerol moieties of the glycerolipids in the developing maize leaf.

Authors:  C R Slack; P G Roughan; N Balasingham
Journal:  Biochem J       Date:  1977-02-15       Impact factor: 3.857
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  21 in total

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Journal:  Arabidopsis Book       Date:  2010-06-11

2.  Acyl-Trafficking During Plant Oil Accumulation.

Authors:  Guanqun Chen; Helen K Woodfield; Xue Pan; John L Harwood; Randall J Weselake
Journal:  Lipids       Date:  2015-10-12       Impact factor: 1.880

3.  Acyl-CoA:Lysophosphatidylethanolamine Acyltransferase Activity Regulates Growth of Arabidopsis.

Authors:  Katarzyna Jasieniecka-Gazarkiewicz; Ida Lager; Anders S Carlsson; Katharina Gutbrod; Helga Peisker; Peter Dörmann; Sten Stymne; Antoni Banaś
Journal:  Plant Physiol       Date:  2017-04-13       Impact factor: 8.340

4.  The phosphatidylcholine diacylglycerol cholinephosphotransferase is required for efficient hydroxy fatty acid accumulation in transgenic Arabidopsis.

Authors:  Zhaohui Hu; Zhonghai Ren; Chaofu Lu
Journal:  Plant Physiol       Date:  2012-02-27       Impact factor: 8.340

5.  Rapid kinetic labeling of Arabidopsis cell suspension cultures: implications for models of lipid export from plastids.

Authors:  Henrik Tjellström; Zhenle Yang; Doug K Allen; John B Ohlrogge
Journal:  Plant Physiol       Date:  2011-11-29       Impact factor: 8.340

6.  Acyl editing and headgroup exchange are the major mechanisms that direct polyunsaturated fatty acid flux into triacylglycerols.

Authors:  Philip D Bates; Abdelhak Fatihi; Anna R Snapp; Anders S Carlsson; John Browse; Chaofu Lu
Journal:  Plant Physiol       Date:  2012-08-29       Impact factor: 8.340

7.  Metabolically Distinct Pools of Phosphatidylcholine Are Involved in Trafficking of Fatty Acids out of and into the Chloroplast for Membrane Production.

Authors:  Nischal Karki; Brandon S Johnson; Philip D Bates
Journal:  Plant Cell       Date:  2019-09-11       Impact factor: 11.277

8.  Engineering salt-tolerant Brassica plants: characterization of yield and seed oil quality in transgenic plants with increased vacuolar sodium accumulation.

Authors:  H X Zhang; J N Hodson; J P Williams; E Blumwald
Journal:  Proc Natl Acad Sci U S A       Date:  2001-10-16       Impact factor: 11.205

9.  14C-Tracing of Lipid Metabolism.

Authors:  Hari Kiran Kotapati; Philip D Bates
Journal:  Methods Mol Biol       Date:  2021

10.  Metabolic interactions between the Lands cycle and the Kennedy pathway of glycerolipid synthesis in Arabidopsis developing seeds.

Authors:  Liping Wang; Wenyun Shen; Michael Kazachkov; Guanqun Chen; Qilin Chen; Anders S Carlsson; Sten Stymne; Randall J Weselake; Jitao Zou
Journal:  Plant Cell       Date:  2012-11-13       Impact factor: 11.277
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