title: Isolation of lipids from photosystem I complex and its characterization with high performance liquid chromatography/electrospray ionization mass spectrometry.
abstract: A method for simultaneous analysis of lipids extracted from photosystem I complex was developed with high performance liquid chromatography/electrospray ionization mass spectrometry. The photosystem I complex was firstly solubilized and separated using deoxycholate polyacrylamide gel electrophoresis method after ultrasonic treatment of the sample (leaves of pea, Pisum sativum L.). The Photosystem I complexes were electrophoretically eluted from the deoxycholate polyacrylamide gel electrophoresis bands containing them, and the electron transport activity of the eluent measured as confirmation. Lipids, which were isolated from the complex having photosystem I activity, were separated and characterized with high performance liquid chromatography/electrospray ionization mass spectrometry. Five lipids, monogalactosyldiacylglycerol, digalactosyldiacylglycerol, phosphatidylglycerol, sulphoquinovosyldiacylglycerol and phosphaditylcholine were found combining with photosystem I complex. Different species of these lipids were found in the ESI mass spectra and the compositions of the acyl groups in them were determined.
authors.affiliation: Key Laboratory of Genetics and Breeding of Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University, Beijing 100083, PR China.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Yao
authors.forename: Yujie
authors.initials: Y
authors.lastname: Shi
authors.forename: Rongfu
authors.initials: R
authors.lastname: Gao
authors.forename: Guifeng
authors.initials: G
authors.lastname: Zhang
authors.forename: Rumin
authors.initials: R
authors.lastname: Zhang
authors.forename: Caixia
authors.initials: C
authors.lastname: Zheng
authors.forename: Bingjiu
authors.initials: B
authors.lastname: Xu
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004591:Electrophoresis, Polyacrylamide Gel; D008055:Lipids / Q000302:isolation & purification*; D018532:Pisum sativum / Q000737:chemistry; D045331:Photosystem I Protein Complex / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D008055:Lipids; D045331:Photosystem I Protein Complex