alexa Are glucocerebrosides the predominant sphingolipids in plant plasma membranes?
Chemical Engineering

Chemical Engineering

Journal of Analytical & Bioanalytical Techniques

Author(s): Sperling P, Franke S, Lthje S, Heinz E

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Abstract Long-chain sphingobases have been analyzed in various fractions prepared from different organs (leaf, root, storage tissue) from five dicotyledoneous plants (Arabidopsis thaliana, Brassica oleracea, Nicotiana tabacum, Pisum sativum, Spinacia oleracea). The resulting sphingobase profiles from cerebrosides and plasma membranes (PMs) show large qualitative and quantitative differences. Assuming that cerebrosides from all cellular membranes have similar sphingobase profiles, these data suggest that cerebrosides, considered to be characteristic glycolipids of plant PMs and specified by large proportions of sphingobases with an 8Z-double bond motif, do not represent the major sphingolipids of PMs. The fraction of unidentified complex sphingolipids, containing mainly 8E-phytosphingenine, exceeds the cerebroside proportion in PMs by several factors and may be as abundant as diacylglycerol-based phospholipids. These results are discussed with respect to the distribution of various lipids between the bilayer halves of plant PM. This article was published in Plant Physiol Biochem and referenced in Journal of Analytical & Bioanalytical Techniques

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