Silencing of a Pseudo-nitzschia arenysensis lipoxygenase transcript leads to reduced oxylipin production and impaired growth
| Autor: | Angelo Fontana, Giovanna Romano, Maria Luisa Chiusano, Ida Orefice, Luca Ambrosino, Maria Immacolata Ferrante, Valeria Sabatino, Pina Marotta, Giuliana d'Ippolito |
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| Přispěvatelé: | Sabatino, Valeria, Orefice, Ida, Marotta, Pina, Ambrosino, Luca, Chiusano, Maria Luisa, D'Ippolito, Giuliana, Romano, Giovanna, Fontana, Angelo, Ferrante, Maria Immacolata |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
0106 biological sciences
Physiology In silico Lipoxygenase Oxylipin Pseudo-nitzschia arenysensi Plant Science 01 natural sciences Transcriptome 03 medical and health sciences biosynthesi Downregulation and upregulation RNA interference algal growth Gene silencing Oxylipins Gene 030304 developmental biology Diatoms 0303 health sciences Pseudo-nitzschia arenysensis biology Chemistry RNA-interference diatom gene function Biochemistry biology.protein lipids (amino acids peptides and proteins) biosynthesis 010606 plant biology & botany |
| Zdroj: | New phytologist Sep 17 (2021): 1–14. doi:10.1111/nph.17739 info:cnr-pdr/source/autori:Sabatino, Valeria; Orefice, Ida; Marotta, Pina; Ambrosino, Luca; Chiusano, Maria Luisa; d'Ippolito, Giuliana; Romano, Giovanna; Fontana, Angelo; Ferrante, Maria Immacolata/titolo:Silencing of a Pseudo-nitzschia arenysensis lipoxygenase transcript leads to reduced oxylipin production and impaired growth/doi:10.1111%2Fnph.17739/rivista:New phytologist (Print)/anno:2021/pagina_da:1/pagina_a:14/intervallo_pagine:1–14/volume:Sep 17 |
| DOI: | 10.1111/nph.17739 |
| Popis: | Because of their importance as chemical mediators, the presence of a rich and varied family of lipoxygenase (LOX) products, collectively named oxylipins, has been investigated thoroughly in diatoms, and the involvement of these products in important processes such as bloom regulation has been postulated. Nevertheless, little information is available on the enzymes and pathways operating in these protists. Exploiting transcriptome data, we identified and characterized a LOX gene, PaLOX, in Pseudo-nitzschia arenysensis, a marine diatom known to produce different species of oxylipins by stereo- and regio-selective oxidation of eicosapentaenoic acid (EPA) at C12 and C15. PaLOX RNA interference correlated with a decrease of the lipid-peroxidizing activity and oxylipin synthesis, as well as with a reduction of growth of P. arenysensis. In addition, sequence analysis and structure models of the C-terminal part of the predicted protein closely fitted with the data for established LOXs from other organisms. The presence in the genome of a single LOX gene, whose downregulation impairs both 12- and 15-oxylipins synthesis, together with the in silico 3D protein modelling suggest that PaLOX encodes for a 12/15S-LOX with a dual specificity, and provides additional support to the correlation between cell growth and oxylipin biosynthesis in diatoms. |
| Databáze: | OpenAIRE |
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