An increase in the membrane lipids recycling by PDAT overexpression stimulates the accumulation of triacylglycerol in Nannochloropsis gaditana

Overview
TitleAn increase in the membrane lipids recycling by PDAT overexpression stimulates the accumulation of triacylglycerol in Nannochloropsis gaditana
AuthorsFattore N, Bucci F, Bellan A, Bossi S, Maffei ME, Morosinotto T
TypeJournal Article
Journal NameJournal of biotechnology
VolumeN/A
IssueN/A
Year2022
Page(s)N/A
CitationFattore N, Bucci F, Bellan A, Bossi S, Maffei ME, Morosinotto T. An increase in the membrane lipids recycling by PDAT overexpression stimulates the accumulation of triacylglycerol in Nannochloropsis gaditana. Journal of biotechnology. 2022 Aug 02.

Abstract

Oleaginous microalgae represent potential feedstocks for the sustainable production of lipids thanks to their ability to accumulate triacylglycerols (TAGs). TAG accumulation in several algal species is strongly induced under specific conditions such as nutrient deprivation and high light which, however, also negatively impact growth. Genetic modification of lipogenic pathways can potentially enhance TAG accumulation without negatively affecting growth, avoiding the trade-off between biomass and lipids productivity. In this study, the phospholipid: diacylglycerol acyltransferase (PDAT), an enzyme involved in membrane lipid recycling, was overexpressed in the seawater alga Nannochloropsis gaditana. PDAT overexpression induced increased TAG content in actively growing algae cultures while no effects were observed in conditions naturally stimulating strong lipid accumulation such as high light and nitrogen starvation. The increase of TAG content was confirmed also in a strain cultivated in industrially relevant conditions even though PDAT overexpression, if too strong, the gene overexpression becomes detrimental for growth in the longer term. Results overall suggest that genetic modulation of the PDAT gene represents a promising strategy to increase microalgae lipids content by minimizing negative effects on biomass productivity.

Properties
Additional details for this publication include:
Property NameValue
Journal CountryNetherlands
Publication TypeJournal Article
Language Abbreng
LanguageEnglish
CopyrightCopyright © 2022 Elsevier B.V. All rights reserved.
DOI10.1016/j.jbiotec.2022.07.007
Elocation10.1016/j.jbiotec.2022.07.007
PIIS0168-1656(22)00173-0
Journal AbbreviationJ Biotechnol
Publication Date2022 Aug 02
eISSN1873-4863
ISSN1873-4863
Publication ModelPrint-Electronic
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PMID: PubMedPMID:35931238