PMID- 17681288 OWN - NLM STAT- MEDLINE DCOM- 20080102 LR - 20071015 IS - 0009-3084 (Print) IS - 0009-3084 (Linking) VI - 150 IP - 2 DP - 2007 Dec TI - The lipid composition of the unicellular green alga Chlamydomonas reinhardtii and the diatom Cyclotella meneghiniana investigated by MALDI-TOF MS and TLC. PG - 143-55 AB - The lipid composition of algae is crucial for numerous structural and physiological aspects, e.g. the integrity of the photosynthetic complexes and the functionality of membrane-embedded processes as the photosynthetic electron transport in thylakoids or the mitochondrial respiration. In this paper the lipid composition of the organic extracts of the green alga Chlamydomonas reinhardtii and the diatom Cyclotella meneghiniana are compared by using matrix-assisted laser desorption and ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) in combination with thin-layer chromatography (TLC). The combined methods enable quantitative evaluation of the individual lipid classes as well as the determination of the relative acyl compositions. It will be shown that both algae differ in (a) the lipid classes, (b) the relative contribution of the individual lipid classes and (c) the acyl compositions. Differences in the acyl composition concern particularly the mono- and digalactosyl diacylglycerols. Glycerol-trimethylhomoserine and phosphatidylethanolamine are exclusively detected in the C. reinhardtii extracts, whereas phosphatidylcholine is a characteristic lipid of C. meneghiniana. Furthermore, the proportion of the acidic lipids sulfoquinovosyl-diacylglycerol and phosphatidylglycerol is significantly higher in the diatom than in C. reinhardtii. FAU - Vieler, Astrid AU - Vieler A AD - University of Leipzig, Faculty of Biosciences, Pharmacy and Psychology, Institute of Biology I, Johannisallee 21-23, D-04103 Leipzig, Germany. FAU - Wilhelm, Christian AU - Wilhelm C FAU - Goss, Reimund AU - Goss R FAU - Suss, Rosmarie AU - Suss R FAU - Schiller, Jurgen AU - Schiller J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070703 PL - Ireland TA - Chem Phys Lipids JT - Chemistry and physics of lipids JID - 0067206 RN - 0 (Ions) RN - 0 (Lipids) RN - 1406-65-1 (Chlorophyll) RN - 36-88-4 (Carotenoids) SB - IM MH - Animals MH - Biochemistry/*methods MH - Carotenoids/chemistry MH - Chlamydomonas reinhardtii/*metabolism MH - Chlorophyll/chemistry MH - Chromatography, Thin Layer/*methods MH - Diatoms/*metabolism MH - Ions MH - Lipids/*chemistry MH - Models, Chemical MH - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/*methods EDAT- 2007/08/08 09:00 MHDA- 2008/01/03 09:00 CRDT- 2007/08/08 09:00 PHST- 2007/02/27 00:00 [received] PHST- 2007/06/26 00:00 [revised] PHST- 2007/06/28 00:00 [accepted] PHST- 2007/08/08 09:00 [pubmed] PHST- 2008/01/03 09:00 [medline] PHST- 2007/08/08 09:00 [entrez] AID - S0009-3084(07)00386-6 [pii] AID - 10.1016/j.chemphyslip.2007.06.224 [doi] PST - ppublish SO - Chem Phys Lipids. 2007 Dec;150(2):143-55. doi: 10.1016/j.chemphyslip.2007.06.224. Epub 2007 Jul 3.