Abstract
The free sterols and phospholipids of the demospongeAplysina fistularis were isolated and analyzed. The free sterols consisted mainly of the unusual 26-methylated sterols aplysterol (53%) and 24(28)-dehydroaplysterol (7%) together with 7 commonly occurring sterods. The major phospholipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylinositol, phosphatidylethanolamine, phosphatidylserine and diphosphatidylglycerol. The major fatty acyl components of the phospholipids consisted of 85% C14−C20 acids, including the unprecedented 2,6,10-trimethyl-5-tetradecenoic acid and 11-methyloctadecanoic acid. The remaining 15% were C27−C30 demospongic acids, including 2 novel acids tentatively assigned the structures 5,9,23-octacosatrienoic acid and 5,9,23-nonacosatrienoic acid, and 3 novel acids proven to be 5,9,21-octacosatrienoic acid, Z,Z-20-methyl-5,9-hexacosadienoic acid and Z,Z-22-methyl-5,9-octacosadienoic acid. The biosyntheses of the novel demospongic acids are proposed to occur by chain elongation of monoenoic or branched precursors followed by desaturation. The large quantities of typically bacterial phospholipids and fatty acids found implied the presence of bacteria in the sponge, in agreement with microscopic studies. Analysis of the phospholipid-bound fatty acids in a sponge cell-enriched fraction indicated that the demospongic acids, including the 2 branched structures, were the major acids of the sponge cells. The presence inA. fistularis of demospongic acids containing membrane disordering groups—methyl branches or double bonds—on the ω7 carbon is proposed to be due to the need by the sponge for membranes possessing fluidity near the middle of the phospholipid bilayer. It is also proposed that the C26 methyl group of aplysterol causes disordering of the phospholipid bilayer in the same region, and thus also evolved in response to this need.
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Abbreviations
- PC:
-
phosphatidylcholine
- PG:
-
phosphatidylglycerol
- PI:
-
phosphatidylinositol
- PE:
-
phosphatidylethanolamine
- PS:
-
phosphatidylserine
- DPG:
-
diphosphatidylglycerol
- BHT:
-
butylated hydroxytoluene
References
Harel, Z., and Djerassi, C. (1980) Lipids 15, 694–696.
Berquist, P.R. (1980), N.Z. J. Zool. 7, 443–503.
Djerassi, C., Theobald, N., Kokke, W.C.M.C., Pak, C.S., and Carlson, R.M.K. (1979) Pure Appl. Chem. 51, 1815–1828.
Djerassi, C. (1981) Pure Appl. Chem. in press.
Goad, L.J. (1978) in Marine Natural Products: Chemical and Biological Perspectives (Scheuer, P.J., ed.) Vol. II, pp. 75–172, Academic Press, New York, NY.
Sjostrand, U., and Bohlin, L. (1981) in Handbook of Marine Science (Baker, J.T., and Murphy, V., eds.) Vol. 3, CRC Press, Cleveland, OH, in press.
Carlson, R.M.K., Tarchini, C., and Djerassi, C. (1980) in Frontiers of Bioorganic Chemistry and Molecular Biology (Ananchenko, S.N., ed.) pp. 211–224, Pergamon Press, New York, NY.
Bloch, K. (1981) in Membranes and Transport, Plenum Press, New York, NY, in press.
Suckling, K.E., Blair, H.A.F., Boyd, G.S., Craig, I.F., and Malcolm, B.R. (1979) Biochim. Biophys. Acta 551, 10–21.
De Rosa, M., Minale, L., and Sodano, G. (1973) Comp. Biochem. Physiol. 46B, 823–837.
Nelson, G.J. (1975) in Analysis of Lipids and Lipoproteins (Perkins, E.G., ed.) pp. 1–22, American Oil Chemists' Society, Champaign, IL.
Privett, O.S., Dougherty, K.A., Erdahl, W.L., and Stolyhwo, A. (1973) J. Am. Oil Chem. Soc. 50, 516–520.
Idler, D.R., and Safe, L.M. (1972) Steroids 19, 315–324.
Skipski, V.P., and Barclay, M. (1969) Methods Enzymol. 14, 530–598.
Kates, M. (1972) in Laboratory Techniques in Biochemistry and Molecular Biology (Work, T.S., and Work, E., eds.) Vol. 3, pt. II, pp. 347–353, North-Holland, New York, NY.
Skipski, V.P., Peterson, R.F., and Barclay, M. (1964) Biochem. J. 90, 374–378.
Barlett, G.R. (1959) J. Biol. Chem. 234, 466–468.
Carreau, J.P., and Dubacq, J.P. (1978) J. Chrom. 151, 384–390.
Ackman, R.G. (1972) Prog. Chem. Fats Other Lipids 12, 167–284.
Andersson, B.A. (1978) Prog. Chem. Fats Other Lipids 16, 279–308.
Hill, E.E., Husbands, D.R., and Lands, W.E.M. (1968) J. Biol. Chem. 243, 4440–4451.
Stein, R.A., and Nicolaides, N. (1962) J. Lipid Res. 3, 476–478.
Corey, E.J., Gilman, N.W., and Ganem, B.E. (1968) J. Am. Chem. Soc. 90, 5616–5617.
Place, P., Roumestant, M.-L., and Gore, J. (1976) Bull. Soc. Chim. Fr. 169–176.
Gokhale, P.D., Dalavoy, V.S., Prakasa Rao, A.S.O., Nayak, U.R., and Dev, S. (1974) Synthesis 718–719.
Ratcliffe, R., and Rodehurst, R. (1970) J. Org. Chem. 35, 4000–4002.
Morrison, W.R., and Smith, L.M. (1964) J. Lipid Res. 5, 600–608.
Weibel, E.R. (1969) Int. Rev. Cytol. 26, 235–302.
Fischmeister, I. (1963) Arkiv. Kemi 20, 353–367.
Ghosh, D., Williams, M.A., and Tinoco, J. (1973) Biochim. Biophys. Acta 291, 351–362.
Boon, J.J., de Leeuw, J.W., Hoek, G.J. v.d., and Vosjan, J.M. (1977) J. Bacteriol. 129, 1183–1191.
Frost, D.J., and Gunstone, F.D. (1975) Chem. Phys. Lipids 15, 53–85.
Dyer, J.R. (1965) in Applications of Absorption Spectroscopy of Organic Compounds, p. 99, Prentice-Hall, Englewood Cliffs, NJ.
Dyer, J.R. (1965) in Applications of Absorption Spectroscopy of Organic Compounds, pp. 30–31, Prentice-Hall, Englewood Cliffs, NJ.
Berquist, P.R., Hofheinz, W., and Oesterhelt, G. (1980) Biochem. Syst. Ecol. 8, 423–435.
Joseph, J.D. (1979) Prog. Lipid Res. 18, 1–30.
Lehinger, A.L. (1975) Biochemistry, 2nd ed., p. 674, Worth Publishers, New York, NY.
Kates, M. (1964) Adv. Lipid Res. 2, 17–90.
Salton, M.R.J. (1971) Biomembranes 1, 1–65.
Sara, M., and Vacelet, J. (1973) Trait. Zool. T. III, F. 1, 462–576.
Vacelet, J. (1975) J. Micros. Biol. Cell. 23, 271–288.
Morris, R.J., and Culkin F. (1976) Oceanogr. Mar. Biol. Ann. Rev. 14, 391–433.
Kaneda, T. (1977) Bacteriol. Rev. 41, 391–418.
Lennarz, W.J. (1966) Adv. Lipid Res. 4, 175–225.
Campbell, I.M., and Naworal, J. (1969) J. Lipid Res. 10, 593–598.
Egge, H., Murawski, U., Chatranon, W., and Zilliken, F. (1971). Z. Naturforsch. B. 26, 893–901.
Ballio, A., and Barcellona, S. (1971) Gazz. Chim. Ita. 101, 635–636.
Ackman, R.G., and Hooper, S.N. (1968) Comp. Biochem. Physiol. 24, 549–565.
Schlenk, H. (1972) Fed. Proc. 31, 1430–1435.
Madrigal, R.V., and Smith, C.R. (1975) Lipids 10, 502–504.
Litchfield, C., Greenberg, A.J., Noto, G., and Morales, R.W. (1976) Lipids 11, 567–570.
Sargent, J.R. (1976) in Biochemical and Biophysical Perspectives in Marine Biology (Malins, D.C., and Sargent, J.R., eds.) Vol. 3, pp. 149–212, Academic Press, New York, NY.
Litchfield, C., Tyszkiewicz, J., and Dato, V. (1980) Lipids 15, 200–202.
Morales, R.W., and Litchfield, C. (1976) Biochim. Biophys. Acta 431, 206–216.
Litchfield, C., and Marcantonio, E.E. (1978) Lipids 13, 199–202.
Morales, R.W., and Litchfield, C. (1977) Lipids 12, 570–576.
Silvius, J.R., and McElhaney, R.N. (1980) Chem. Phys. Lipids 26, 67–77.
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For part 1, see ref. 1.
Phylum porifera, class demospongia, subclass ceractinomorpha, order verongida, family aplysinidae (2). Formerly known asVerongia thiona de Laubenfels.
Major diagnostic fragments from peak 23:M+ 471 (2.9%); m/z 442 (C26, 0.2%); m/z 428 (C25, 0.2%); m/z 414 (C24, 0.1%); m/z 400 (C23, 0.3%); (absence of C22 peak); m/z 374 (C21, 0.2%); m/z 360 (C20, 0.2%); m/z 234 (C11, 1.0%); m/z 220 (C10, 0.7%); m/z 206 (C9, 0.5%); m/z 194 (C8, 0.4%); m/z 180 (C7, 24.9%); m/z 166 (C6, 1.2%); m/z 152 (C5, 0.8%); m/z 140 (C4, 1.3%); m/z 126 (C3, 18.7%).
Major diagnostic fragments from peak 25:M+ 485 (0.9%); m/z 456 (C27, 0.1%); (absence of C26, C25 peaks); m/z 414 (C24, 0.3%); m/z 400 (C23, 0.1%); m/z 402 (C23, 0.1%); (absence of C22 peak); m/z 374 (C21, 0.1%); m/z 360 (C20, 0.1%); m/z 234 (C11, 0.5%); m/z 220 (C10, 0.3%); m/z 206 (C9, 0.1%); m/z 194 (C8, 0.2%); m/z 180 (C7, 18.0%); m/z 166 (C6); m/z 152 (C5), m/z 140 (C4); m/z 126 (C3, 15.0%).
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Walkup, R.D., Jamieson, G.C., Ratcliff, M.R. et al. Phospholpid studies of marine organisms: 2.1 Phospholipids, phospholipid-bound fatty acids and free sterols of the spongeAplysina fistularis (Pallas) formafulva (Pallas) (=Verongia thiona)2. Isolation and structure elucidation of unprecedented branched fatty acids. Lipids 16, 631–646 (1981). https://doi.org/10.1007/BF02535058
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DOI: https://doi.org/10.1007/BF02535058