15S-lipoxygenase metabolism in the marine diatom Pseudo-nitzschia delicatissima (Articolo in rivista)

Type
Label
  • 15S-lipoxygenase metabolism in the marine diatom Pseudo-nitzschia delicatissima (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1111/j.1469-8137.2009.02887.x (literal)
Alternative label
  • G. d'Ippolito; N. Lamari; M. Montresor; G. Romano; A. Cutignano; A. Gerecht; G. Cimino; A. Fontana (2009)
    15S-lipoxygenase metabolism in the marine diatom Pseudo-nitzschia delicatissima
    in New phytologist (Print); WILEY-BLACKWELL PUBLISHING, INC, MALDEN (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. d'Ippolito; N. Lamari; M. Montresor; G. Romano; A. Cutignano; A. Gerecht; G. Cimino; A. Fontana (literal)
Pagina inizio
  • 1064 (literal)
Pagina fine
  • 1071 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 183 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-Istituto di Chimica Biomolecolare, Via Campi Flegrei 34, I-80078 Pozzuoli, Napoli, Italy; Phytoplankton Ecology and Evolution, Stazione Zoologica \"Anton Dohrn\", Villa Comunale I-80121 Napoli, Italy; Functional and Evolutionary Ecology, Stazione Zoologica \"Anton Dohrn\", Villa Comunale, I-80121 Napoli, Italy (literal)
Titolo
  • 15S-lipoxygenase metabolism in the marine diatom Pseudo-nitzschia delicatissima (literal)
Abstract
  • o In recent years, oxylipins (lipoxygenase-derived oxygenated fatty acid products) have been reported in several bloom-forming marine diatoms. Despite increasing attention on the ecophysiological role of these molecules in marine environments, their biosynthesis is largely unknown in these microalgae. o Biochemical methods, including tandem mass spectrometry, nuclear magnetic resonance and radioactive probes were used to identify structures, enzymatic activities and growth-dependent modulation of oxylipin biosynthesis in the pennate diatom Pseudo-nitzschia delicatissima. o Three major compounds, 15S-hydroxy-(5Z,8Z,11Z,13E,17Z)-eicosapentaenoic acid (15S-HEPE), 15-oxo 5Z,9E,11E,13E-pentadecatetraenoic acid and 13,14-threo-13R-hydroxy-14S,15S-trans-epoxyeicosa-5Z,8Z,11Z,17Z-tetraenoic acid (13,14- HEpETE), were produced by three putative biochemical pathways triggered by eicosapentaenoic acid-dependent 15S lipoxygenase. Oxylipin production increases along the growth curve, with remarkable changes that precede the demise of the culture. At least one of the compounds, namely 15-oxoacid, is formed only in the stationary phase immediately before the collapse of the culture. o Synthesis and regulation of phyco-oxylipins seem to correspond to a signaling mechanism that governs adaptation of diatoms along the growth curve until bloom termination. Factors triggering the process are unknown but synthesis of 15-oxoacid, constrained within a time-window of a few days just before the collapse of the culture, implies the involvement of a physiological control not directly dependent on distress or death of diatom cells. (literal)
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