Abstract
Subcellular fractionation by differential centrifugation was performed on two previously unstudied marine sponges (Reniera sp. andPseudaxinyssa sp.) that represent both major subclasses of the Demospongiae. Long chain fatty acids (LCFA) with 24–30 carbon units were found as major constituents of cell membrane isolates of both sponges. Most LCFA were polyunsaturated and were constituents of the phospholipids, which are typical membrane lipids, and in particular the amino-phospholipids. The LCFA composition of phospholipids from whole sponge tissue was shown to provide a reliable indication of the LCFA composition of cell membrane phospholipids in the sponges studied. An unusual triply branched C16 isoprenoid fatty acid, 4,8,12-trimethyltridecanoic acid, also was identified as a cell membrane acid in the spongePseudaxinyssa sp.
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Abbreviations
- BHT:
-
butylated hydroxytoluene
- EDTA:
-
ethylenediamine tetraacetic acid
- FAME:
-
fatty acid methyl ester
- LCFA:
-
long chain fatty acid
- LCPUFA:
-
long chain polyunsaturated fatty acid
- LCUFA:
-
long chain unsaturated fatty acid
- PC:
-
phosphatidylcholine
- PE:
-
phosphatidylethanolamine
- PS:
-
phosphatidylserine
- PUFA:
-
polyunsaturated fatty acid
- TMTD:
-
4,8,12-trimethyltridecanoic acid
- UFA:
-
unsaturated fatty acid
- A:
-
archaeocytes
- CC:
-
choanocyte chambers
- ECL:
-
equivalent chain length
- EM:
-
electron microscopy
- F:
-
flagella
- FSW:
-
filtered seawater
- GC:
-
gas chromatography
- GC-MS:
-
gas chromatography-mass spectrometry
- MV:
-
microvilli
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Part 16 of “Phospholipid Studies of Marine Organisms.” For Part 15 in this series see Dasgupta, A., Ayanoglu, E., Tomer, K.B., and Djerassi, C. (1987)Chem. Phys. Lipids 43, 101–111.
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Lawson, M.P., Thompson, J.E. & Djerassi, C. Cell membrane localization of long chain C24−C30 fatty acids in two marine demosponges. Lipids 23, 741–749 (1988). https://doi.org/10.1007/BF02536215
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DOI: https://doi.org/10.1007/BF02536215