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Mar. Drugs 2014, 12(1), 368-384; doi:10.3390/md12010368

Oxylipin Diversity in the Diatom Family Leptocylindraceae Reveals DHA Derivatives in Marine Diatoms

1
Stazione Zoologica Anton Dohrn, Villa Comunale, Naples 80121, Italy
2
CNR-Institute Biomolecular Chemistry, Via Campi Flegrei 34, Pozzuoli (Naples) 80078, Italy
*
Author to whom correspondence should be addressed.
Received: 18 November 2013 / Revised: 20 December 2013 / Accepted: 23 December 2013 / Published: 17 January 2014
(This article belongs to the Special Issue Metabolites in Diatoms)
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Abstract

Marine planktonic organisms, such as diatoms, are prospective sources of novel bioactive metabolites. Oxygenated derivatives of fatty acids, generally referred to as oxylipins, in diatoms comprise a highly diverse and complex family of secondary metabolites. These molecules have recently been implicated in several biological processes including intra- and inter-cellular signaling as well as in defense against biotic stressors and grazers. Here, we analyze the production and diversity of C20 and C22 non-volatile oxylipins in five species of the family Leptocylindraceae, which constitute a basal clade in the diatom phylogeny. We report the presence of species-specific lipoxygenase activity and oxylipin patterns, providing the first demonstration of enzymatic production of docosahexaenoic acid derivatives in marine diatoms. The differences observed in lipoxygenase pathways among the species investigated broadly reflected the relationships observed with phylogenetic markers, thus providing functional support to the taxonomic diversity of the individual species. View Full-Text
Keywords: oxylipins; diatoms; Leptocylindrus; lipoxygenase pathways; eicosapentaenoic acid; docosahexaenoic acid oxylipins; diatoms; Leptocylindrus; lipoxygenase pathways; eicosapentaenoic acid; docosahexaenoic acid
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Nanjappa, D.; d'Ippolito, G.; Gallo, C.; Zingone, A.; Fontana, A. Oxylipin Diversity in the Diatom Family Leptocylindraceae Reveals DHA Derivatives in Marine Diatoms. Mar. Drugs 2014, 12, 368-384.

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